Patent US5839016A successfully refreshed from Google Patents.
Patent US5136375A successfully refreshed from Google Patents.
US5136375A
Expired / Lapsed
US
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Spectrum compatible-HDTV data transmission system
Assignee: Zenith Electronics LLC
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Filing: 1990-07-17
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Granted: 1992-08-04
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Expires: 2010-07-17
Abstract
Abstract A spectrum compatible HDTV data transmission system includes an adaptive delta modulator for producing 12-bit packets comprising direction and slope components of successive groups of three samples of removed low frequency video siganl. The 12-bit packets are compressed by a lookup table to four-bit output codes prioritized according to the statistical likelihood of occurrence of the 12-bit packet in a typical video signal. The 15 most likely to occur 12-bit packets are mapped to four-bit output codes 1-15 and the remaining 4080 12-bit packets are mapped to a common four-bit linking code. The next 255 most likely to occur of the remaining 4080 12-bit packets are further mapped to eight-bit output codes. All of the remaining 12-bit packets are mapped to the common remaining state of the eight-bit output codes. The compressed output codes are correlated with the constellation states of a quadrature modulator, with the constellation states requiring the least transmission power corresponding to the most likely to occur of the four-bit output codes. The output codes are multiplexed with the high frequency video before application to the quadrature modulator. The output of the modulator is transmitted at RF frequencies.
Inventors
- 👤 Richard W. Citta
- 👤 Dennis M. Mutzabaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:06
CPC Classifications
H; H04; H04N; H04N19/00; H04N21/00; H04N21/40; H04N21/41; H04N21/426; H04N7/00; H04N7/015; H04N19/30
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
107 words
A method of operating a video signal transmitted system comprising the steps of: separating said video signal into first components having a relatively high transmission power requirement and second components having a relatively low transmission power requirement; encoding said first components into a plurality of data packets; compressing said data packets into a plurality of compressed codes based upon the likelihood of occurrence of said data packets in said video signal; and supplying said compressed codes to a modulator having a multi-state constellation with the most likely to occur of said compressed codes being modulated according to the state of said constellation requiring the least transmission power.
Claim 2
Independent Claim
107 words
A method of operating a video signal transmitted system comprising the steps of: separating said video signal into first components having a relatively high transmission power requirement and second components having a relatively low transmission power requirement; encoding said first components into a plurality of data packets; compressing said data packets into a plurality of compressed codes based upon the likelihood of occurrence of said data packets in said video signal; and supplying said compressed codes to a modulator having a multi-state constellation with the most likely to occur of said compressed codes being modulated according to the state of said constellation requiring the least transmission power.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein said encoding step comprises sampling said first components and developing said data packets from contiguous groups of sampled first components.
Claim 4
Dependent Claim
31 words
The method of claim 2 wherein said modulator is a quadrature modulator and wherein said compressing step further comprises correlating said data packets and said compressed codes with a lockup table.
Claim 5
Dependent Claim
31 words
The method of claim 3 wherein said data packets are in the form of 12-bit words and wherein said 12-bit words are mapped by said lockup table to four-bit compressed codes.
Claim 6
Dependent Claim
36 words
The method of claim 4 wherein said lockup table maps the majority of said 12-bit words to a common four-bit linking code and a unique eight-bit output code in order of their decreasing likelihood of occurrence.
Claim 7
Independent Claim
157 words
A method of operating a video signal transmission system comprising the steps of: separating said video signal into first components having a relatively high transmission power requirement and second components having a relatively low transmission power requirement; sampling said first components and developing 12-bit word data packets from contiguous groups of samples; compressing said data packets into a plurality of four-bit compressed codes based upon their likelihood of occurrence in said video signal by correlating said data packets and said compressed codes with a lockup table, said lockup table mapping the majority of said 12-bit words to a common four-bit linking code and a unique eight-bit output code in order of their decreasing likelihood of occurrence in said video signal; and supplying said compressed codes to a quadrature modulator having a multi-state constellation with the most likely to occur of said compressed codes being modulated according to the state of said constellation requiring the least transmission power.
Claim 8
Independent Claim
157 words
A method of operating a video signal transmission system comprising the steps of: separating said video signal into first components having a relatively high transmission power requirement and second components having a relatively low transmission power requirement; sampling said first components and developing 12-bit word data packets from contiguous groups of samples; compressing said data packets into a plurality of four-bit compressed codes based upon their likelihood of occurrence in said video signal by correlating said data packets and said compressed codes with a lockup table, said lockup table mapping the majority of said 12-bit words to a common four-bit linking code and a unique eight-bit output code in order of their decreasing likelihood of occurrence in said video signal; and supplying said compressed codes to a quadrature modulator having a multi-state constellation with the most likely to occur of said compressed codes being modulated according to the state of said constellation requiring the least transmission power.
Claim 9
Dependent Claim
99 words
A video signal transmission system comprising: means for developing a first signal comprising substantially high frequency video information and a second signal comprising substantially low frequency video information; means for developing samples of said low frequency video information; means for grouping said samples into 12-bit data packets; means for comprising said 12-bit data packets into four-bit compressed codes; and means for applying said four-bit compressed codes to a quadrature modulator having a plurality of constellation states such that the constellation state requiring the lowest transmission power corresponds to the four-bit compressed code having the greatest statistical probability of occurrence.
Claim 10
Dependent Claim
99 words
A video signal transmission system comprising: means for developing a first signal comprising substantially high frequency video information and a second signal comprising substantially low frequency video information; means for developing samples of said low frequency video information; means for grouping said samples into 12-bit data packets; means for comprising said 12-bit data packets into four-bit compressed codes; and means for applying said four-bit compressed codes to a quadrature modulator having a plurality of constellation states such that the constellation state requiring the lowest transmission power corresponds to the four-bit compressed code having the greatest statistical probability of occurrence.
Claim 11
Dependent Claim
22 words
The system of claim 7 wherein said 12-bit data packets comprise delta modulation components defining the direction and slope of said samples.
Claim 12
Dependent Claim
21 words
The system of claim 8 wherein said data packets comprise three successive samples of two-bit direction and two-bit slope modulation components.
Claim 13
Dependent Claim
24 words
The system of claim 9 wherein said compressing means include a lookup table for mapping said 12-bit data packets to said four-bit compressed codes.
Claim 14
Dependent Claim
33 words
The system of claim 10, further including: multiplexer means having inputs coupled to said applying means and to said means for developing said first signal and an output coupled to said quadrature modulator.
Claim 15
Dependent Claim
151 words
A video signal transmission system comprising: means for developing a first signal comprising substantially high frequency video information and a second signal comprising substantially low frequency video information; means for developing samples of said low frequency video information; means for delta modulating said samples into a two-bit direction component and a two-bit slope component; means for grouping said delta modulation components of three successive samples into 12-bit data packets; means for compressing said 12-bit data packets into four-bit compressed codes, said compressing means including a lookup table for mapping said 12-bit data packets to said four-bit compressed codes; a quadrature modulator having a plurality of constellation states with the constellation state requiring the lowest transmission power corresponding to the four-bit compressed code having the greatest statistical probability of occurrence; and multiplexer means having inputs of said four-bit compressed codes and said first signal and an output coupled to said quadrature modulator.
Claim 16
Dependent Claim
151 words
A video signal transmission system comprising: means for developing a first signal comprising substantially high frequency video information and a second signal comprising substantially low frequency video information; means for developing samples of said low frequency video information; means for delta modulating said samples into a two-bit direction component and a two-bit slope component; means for grouping said delta modulation components of three successive samples into 12-bit data packets; means for compressing said 12-bit data packets into four-bit compressed codes, said compressing means including a lookup table for mapping said 12-bit data packets to said four-bit compressed codes; a quadrature modulator having a plurality of constellation states with the constellation state requiring the lowest transmission power corresponding to the four-bit compressed code having the greatest statistical probability of occurrence; and multiplexer means having inputs of said four-bit compressed codes and said first signal and an output coupled to said quadrature modulator.
Claim 17
Dependent Claim
147 words
A video signal transmission system comprising: at a transmitter; means for developing a first signal comprising substantially high frequency video information and a second signal comprising substantially low frequency video information; means for developing samples of said low frequency video information; means for grouping said samples into 12-bit data packets; means for compressing said 12-bit data packets into four-bit compressed codes; means for applying said four-bit compressed codes to a quadrature modulator having a plurality of constellation states such that the constellation state requiring the lowest transmission power corresponds to the four-bit compressed code having the greatest statistical probability of occurrence; at a receiver; means for receiving and demodulating said four-bit compressed codes; means for expanding said four-bit compressed codes to said 12-bit data packets; means for recovering said samples from said 12-bit data packets; and means for reconstructing said low frequency video information from said samples.
Claim 18
Dependent Claim
147 words
A video signal transmission system comprising: at a transmitter; means for developing a first signal comprising substantially high frequency video information and a second signal comprising substantially low frequency video information; means for developing samples of said low frequency video information; means for grouping said samples into 12-bit data packets; means for compressing said 12-bit data packets into four-bit compressed codes; means for applying said four-bit compressed codes to a quadrature modulator having a plurality of constellation states such that the constellation state requiring the lowest transmission power corresponds to the four-bit compressed code having the greatest statistical probability of occurrence; at a receiver; means for receiving and demodulating said four-bit compressed codes; means for expanding said four-bit compressed codes to said 12-bit data packets; means for recovering said samples from said 12-bit data packets; and means for reconstructing said low frequency video information from said samples.
Claim 19
Dependent Claim
59 words
The system of claim 13 wherein said 12-bit data packets comprise three successive samples of two-bit direction and two-bit slope delta modulation components and wherein said compressing means and said expanding means include lookup tables for mapping said 12-bit data packets to said four-bit compressed codes and for mapping said four-bit compressed codes to said 12-bit data packets, respectively.
Claim 20
Dependent Claim
58 words
The system of claim 13, further including: at the transmitter: multiplexer means having inputs coupled to said applying means and to said means for developing said first signal and an output coupled to said quadrature modulator; at the receiver: means for demodulating said first signal; and means for combining said first signal and said reconstructed low frequency signal.
Claim 21
Independent Claim
47 words
A method of transmitting video components of a television signal, comprising: entropy-encoding said video components; and transmitting said entropy-encoded video components such that video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently.
Claim 22
Independent Claim
47 words
A method of transmitting video components of a television signal, comprising: entropy-encoding said video components; and transmitting said entropy-encoded video components such that video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently.
Claim 23
Dependent Claim
47 words
The method of claim 16 wherein said entropy-encoding of said video components comprises: sampling and digitizing said video components and formatting the resulting signal into coded packets of video information; and classifying the coded packets in accordance with their expected frequency of occurrence in said television signal.
Claim 24
Dependent Claim
20 words
The method of claim 17 wherein said coded packets comprise scene information related to a predetermined plurality of picuture elements.
Claim 25
Independent Claim
63 words
A method of transmitting video components of a television signal comprising: separating out from said television signal video components having a relatively high power content; entropy-encoding said separated out video components; and transmitting said entropy-encoded components such that the video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently.
Claim 26
Independent Claim
63 words
A method of transmitting video components of a television signal comprising: separating out from said television signal video components having a relatively high power content; entropy-encoding said separated out video components; and transmitting said entropy-encoded components such that the video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently.
Claim 27
Independent Claim
70 words
A method of transmitting video components of a television signal comprising: separating out from said television signal video components having a relatively high power content; entropy-encoding said separated out video components; and transmitting, during non video portions of the television signal, said entropy-encoded components such that video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently.
Claim 28
Independent Claim
70 words
A method of transmitting video components of a television signal comprising: separating out from said television signal video components having a relatively high power content; entropy-encoding said separated out video components; and transmitting, during non video portions of the television signal, said entropy-encoded components such that video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently.
Claim 29
Independent Claim
76 words
A method of transmitting video components of a television signal, comprising: sampling and digitizing said video components, and formatting the resulting signals into coded packets; classifying said coded packets in accordance with their expected frequency of occurrence in said television signal; and responsive to said classification, transmitting said coded packets such that video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently.
Claim 30
Independent Claim
76 words
A method of transmitting video components of a television signal, comprising: sampling and digitizing said video components, and formatting the resulting signals into coded packets; classifying said coded packets in accordance with their expected frequency of occurrence in said television signal; and responsive to said classification, transmitting said coded packets such that video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently.
Claim 31
Dependent Claim
22 words
The method of claim 21 wherein each of said coded packets comprises scene information related to a predetermined plurality of picture elements.
Claim 32
Dependent Claim
48 words
In the transmission of video components of a television signal, the method comprising: sampling, digitizing and slope-and-direction encoding said video components; and formatting the resulting signals into coded packets such that each of said coded packets comprises scene information related to a predetermined plural number of picture elements.
Claim 33
Dependent Claim
48 words
In the transmission of video components of a television signal, the method comprising: sampling, digitizing and slope-and-direction encoding said video components; and formatting the resulting signals into coded packets such that each of said coded packets comprises scene information related to a predetermined plural number of picture elements.
Claim 34
Independent Claim
32 words
A method of transmitting video components of a television signal comprising: separating components having a relatively high power content from said video signal; entropy-encoding said separated components; and transmitting said entropy-encoded components.
Claim 35
Independent Claim
32 words
A method of transmitting video components of a television signal comprising: separating components having a relatively high power content from said video signal; entropy-encoding said separated components; and transmitting said entropy-encoded components.
Claim 36
Dependent Claim
40 words
The method of claim 24 wherein said entropy-encoding comprises: sampling and digitizing said separated components and formatting the resulting signals into coded packets; and classifying said coded packets in accordance with their expected frequency of occurrence in said television signal.
Claim 37
Dependent Claim
22 words
The method of claim 25 wherein each of said coded packets comprises scene information related to a predetermined plurality of picture elements.
Claim 38
Independent Claim
87 words
A method of transmitting video components of a television signal comprising: separating video components having a relatively high power content from said television signal; sampling and digitizing said video components and formatting the resulting signals into coded packets; classifying said coded packets in accordance with their expected frequency of occurrence in said television signal; and transmitting said entropy-encoded components such that the video information expected to occur more frequently in said television signal is transmitted with less power than the video information expected to occur less frequently.
Claim 39
Independent Claim
87 words
A method of transmitting video components of a television signal comprising: separating video components having a relatively high power content from said television signal; sampling and digitizing said video components and formatting the resulting signals into coded packets; classifying said coded packets in accordance with their expected frequency of occurrence in said television signal; and transmitting said entropy-encoded components such that the video information expected to occur more frequently in said television signal is transmitted with less power than the video information expected to occur less frequently.
Claim 40
Independent Claim
41 words
A method of transmitting video components of a television signal comprising: separating video components having a relatively high power content from said television signal; entropy-encoding said separated video components; and transmitting said entropy-encoded components during non-video portions of said television signal.
Claim 41
Independent Claim
41 words
A method of transmitting video components of a television signal comprising: separating video components having a relatively high power content from said television signal; entropy-encoding said separated video components; and transmitting said entropy-encoded components during non-video portions of said television signal.
Claim 42
Dependent Claim
44 words
The method of claim 28 wherein said entropy-encoding of said components comprises: sampling and digitizing said separated video components and formatting the resulting signal into coded packets; and classifying said coded packets in accordance with their expected frequency of occurrence in said television signal.
Claim 43
Dependent Claim
21 words
The method of claim 29 wherein each of said coded packets comprises scene information related to a plurality of picture elements.
Claim 44
Independent Claim
28 words
A method of transmitting video components of a television signal comprising: entropy-encoding said video components; and Transmitting said entropy-encoded components during non video portions of said television signal.
Claim 45
Independent Claim
28 words
A method of transmitting video components of a television signal comprising: entropy-encoding said video components; and Transmitting said entropy-encoded components during non video portions of said television signal.
Claim 46
Dependent Claim
38 words
The method of claim 31 wherein said entropy-encoding comprises: sampling and digitizing said components and formatting the resulting signal into coded packets; and classifying said coded packets in accordance with expected frequency of occurrence in said television signal.
Claim 47
Dependent Claim
24 words
The method defined by claim 32 wherein each of said coded packets comprises slope-and-direction scene information related to a predetermined plurality of picture elements.
Claim 48
Independent Claim
163 words
The method for transmitting a television signal with normal geographical coverage, but at sufficiently low power to permit use of the FCC-restricted "taboo" television channels, comprising: separating video components having a relatively high power content from said television signal; digitally encoding said separated video components into packets in accordance with spatially related image information; classifying said packets in accordance with expected frequency of occurrence in said television signal; and responsive to said classification, transmitting said digitally encoded video components such that video information expected to occur less frequently in said television signal is transmitted with less power than video information expected to occur more frequently, whereby, by the separation of said relatively high power video components of said television signal, and the transmission of said separated video components in digitally encoded, classified packet form at power levels inversely related to their likelihood of occurrence in said television signal, the transmission power required is sufficiently low as to permit use of said taboo channels.
Claim 49
Independent Claim
163 words
The method for transmitting a television signal with normal geographical coverage, but at sufficiently low power to permit use of the FCC-restricted "taboo" television channels, comprising: separating video components having a relatively high power content from said television signal; digitally encoding said separated video components into packets in accordance with spatially related image information; classifying said packets in accordance with expected frequency of occurrence in said television signal; and responsive to said classification, transmitting said digitally encoded video components such that video information expected to occur less frequently in said television signal is transmitted with less power than video information expected to occur more frequently, whereby, by the separation of said relatively high power video components of said television signal, and the transmission of said separated video components in digitally encoded, classified packet form at power levels inversely related to their likelihood of occurrence in said television signal, the transmission power required is sufficiently low as to permit use of said taboo channels.
Claim 50
Independent Claim
143 words
A method for transmitting a television signal with normal geographical coverage, but at sufficiently low power to permit use of the FCC-restricted "taboo" television channels, comprising: separating video components having a relatively high power content from said television signal; entropy-encoding said separated video components; transmitting said entropy-encoded video components such that video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently; and causing said transmission of said entropy-encoded video components to occur during non video portions of said televison signal, whereby, by the separation of said higher power video components of said television signal, and their transmission in encoded form at power levels inversely related to their likelihood of occurrence in said television signal, the transmission power required is sufficiently low as to permit use of said taboo channels.
Claim 51
Independent Claim
143 words
A method for transmitting a television signal with normal geographical coverage, but at sufficiently low power to permit use of the FCC-restricted "taboo" television channels, comprising: separating video components having a relatively high power content from said television signal; entropy-encoding said separated video components; transmitting said entropy-encoded video components such that video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently; and causing said transmission of said entropy-encoded video components to occur during non video portions of said televison signal, whereby, by the separation of said higher power video components of said television signal, and their transmission in encoded form at power levels inversely related to their likelihood of occurrence in said television signal, the transmission power required is sufficiently low as to permit use of said taboo channels.
Claim 52
Independent Claim
141 words
A method of operating a transmission system, including a video signal, comprising the steps of: at a transmitter; separating said video signal into first components having a relatively high transmission power requirement and second components having a relatively low transmission power requirement; encoding said first components into a plurality of data packets; compressing said data packets into a plurality of compressed codes based upon their likelihood of occurrence in said video; and supplying said compressed codes to a modulator having a multi-state constellation with the most likely to occur of said compressed codes being modulated according to the state of said constellation requiring the least transmission power; at a receiver; receiving said compressed codes; expanding said compressed codes to recover said data packets; decoding said data packets to receiver said first components; and combining said first components with said second components.
Claim 53
Independent Claim
141 words
A method of operating a transmission system, including a video signal, comprising the steps of: at a transmitter; separating said video signal into first components having a relatively high transmission power requirement and second components having a relatively low transmission power requirement; encoding said first components into a plurality of data packets; compressing said data packets into a plurality of compressed codes based upon their likelihood of occurrence in said video; and supplying said compressed codes to a modulator having a multi-state constellation with the most likely to occur of said compressed codes being modulated according to the state of said constellation requiring the least transmission power; at a receiver; receiving said compressed codes; expanding said compressed codes to recover said data packets; decoding said data packets to receiver said first components; and combining said first components with said second components.
Claim 54
Independent Claim
58 words
A method of transmitting and receiving video components of a television signal, comprising: entropy-encoding said video components; transmitting said entropy-encoded video components such that video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently; receiving said entropy-encoded video components; and decoding said entropy-encoded components.
Claim 55
Independent Claim
58 words
A method of transmitting and receiving video components of a television signal, comprising: entropy-encoding said video components; transmitting said entropy-encoded video components such that video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently; receiving said entropy-encoded video components; and decoding said entropy-encoded components.
Claim 56
Independent Claim
98 words
A method of transmitting and receiving video components of a television signal, comprising: sampling and digitizing said video components and formatting the resulting signals into coded packets; classifying said coded packets in accordance with their expected frequency of occurrence in said television signal; responsive to said classification, transmitting said coded packets such that video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently; receiving said coded packets; deformatting said coded packets into said resulting signals; and recovering said video components from said resulting signals.
Claim 57
Independent Claim
98 words
A method of transmitting and receiving video components of a television signal, comprising: sampling and digitizing said video components and formatting the resulting signals into coded packets; classifying said coded packets in accordance with their expected frequency of occurrence in said television signal; responsive to said classification, transmitting said coded packets such that video information expected to occur more frequently in said television signal is transmitted with less power than video information expected to occur less frequently; receiving said coded packets; deformatting said coded packets into said resulting signals; and recovering said video components from said resulting signals.
Claim 58
Independent Claim
176 words
A method of transmitting and receiving a video signal with normal geographical coverage, but at sufficiently low power to permit use of the FCC-restricted "taboo" television channels, comprising: separating components having a relatively high power content from said video signal; digitally encoding said separated components into packets in accordance with spatially related image information; classifying said packets in accordance with their expected frequency of occurrence in said video signal; responsive to said classification, transmitting said packets such that video information expected to occur less frequently in said video signal is transmitted with less power than video information expected to occur more frequently, whereby the separation of said relatively high power content components of said video signal, and the transmission of said separated components in classified, digitally encoded packet form at power levels inversely related to their likelihood of occurrence in video signal, the transmission power required is sufficiently low as to permit use of said taboo channels; receiving said packets; recovering said separated components from said packets; and reconstituting said video signal using said separated components.
Claim 59
Independent Claim
176 words
A method of transmitting and receiving a video signal with normal geographical coverage, but at sufficiently low power to permit use of the FCC-restricted "taboo" television channels, comprising: separating components having a relatively high power content from said video signal; digitally encoding said separated components into packets in accordance with spatially related image information; classifying said packets in accordance with their expected frequency of occurrence in said video signal; responsive to said classification, transmitting said packets such that video information expected to occur less frequently in said video signal is transmitted with less power than video information expected to occur more frequently, whereby the separation of said relatively high power content components of said video signal, and the transmission of said separated components in classified, digitally encoded packet form at power levels inversely related to their likelihood of occurrence in video signal, the transmission power required is sufficiently low as to permit use of said taboo channels; receiving said packets; recovering said separated components from said packets; and reconstituting said video signal using said separated components.
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