EP0251626A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Transmission system for audio-data signals to accompany transmitted video signals
Assignee: Thomson Multimedia Sales UK Ltd
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Filing: 1987-06-22
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Granted: —
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Expires: 2007-06-22
Abstract
Abstract A transmission system l for PAL System-I television signals accompanied by an additional stereo signal for enhanced audio reception includes a transmission station 2 and a number of television receivers (e.g. as shown by 3), each with a decoder unit specifically to process the stereo signal. Transmission station 2 has a studio 4 with an interleaver unit 5 which interleaves the audio/data (but not its indication or control sections) within each frame, and then passes the resultant signals to a transmitter 6, the stereo channel having a carrier frequency 6.55l MHz above that of the the transmitted vision. The de-interleave unit 9 directs incoming frames alternatively to two RAM stores, each with a divide-by-ll divide-by-4 and divide-by-l6 counters.
Inventors
- 👤 Stuart Jackson Holmes
- 👤 Geoffrey Thompson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 02:28
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
156 words
A transmission system for audio/data signals to accompany transmitted video signals, in which system the audio/data signals comprise a stream of digital elements formed into a plurality of frames, each frame comprising three sections, namely a section to indicate the start of a frame, a section to contain control information, and a section to contain the audio/data information, whereby the audio signal is transmitted with the audio/data information section in an interleaved format such that the digital elements are in a different but related sequence to that for output by the television receiver, the system including equipment comprising storage means to hold a plurality of frames of audio/data signals, counter means to effect input of audio/data signals to, and their output from, the storage means, and logic-circuit means to effect re-configuring of the counter means between one mode for effecting input of the signals to the storage means and another mode for effecting their output therefrom.
Claim 2
Dependent Claim
156 words
A transmission system for audio/data signals to accompany transmitted video signals, in which system the audio/data signals comprise a stream of digital elements formed into a plurality of frames, each frame comprising three sections, namely a section to indicate the start of a frame, a section to contain control information, and a section to contain the audio/data information, whereby the audio signal is transmitted with the audio/data information section in an interleaved format such that the digital elements are in a different but related sequence to that for output by the television receiver, the system including equipment comprising storage means to hold a plurality of frames of audio/data signals, counter means to effect input of audio/data signals to, and their output from, the storage means, and logic-circuit means to effect re-configuring of the counter means between one mode for effecting input of the signals to the storage means and another mode for effecting their output therefrom.
Claim 3
Dependent Claim
21 words
A transmission system according to Claim l, wherein the indication and control sections are not in an interleaved format during transmission.
Claim 4
Dependent Claim
25 words
A transmission system according to Claim l or 2 wherein only the audio/data information section of a frame is in an interleaved format during transmission.
Claim 5
Dependent Claim
184 words
A television receiver for a transmission system to provide audio/data signals to accompany transmitted video signals, the transmitter comprising: means to input a transmitted audio/data signal comprising a stream of digital elements formed into a plurality of frames, each frame comprising three sections, namely a section to indicate the start of a frame, a section to contain control information and a section to contain the audio/data information; means to de-interleave the audio/data information section of a frame, the de-interleave means comprising means to change the sequence of digital elements as transmitted according to a predetermined relationship such as to produce a sequence for output by the television receiver, the de-interleave means comprising storage means to hold a plurality of frames of audio/data signals, counter means to effect input of audio/data signals to, and their output from, the storage means, and logic-circuit means to effect re-configuring of the counter means between one mode for effecting input of the signals to the storage means and another mode for effecting their output therefrom; and means to display the resultant audio/data signal in association with a video signal.
Claim 6
Dependent Claim
184 words
A television receiver for a transmission system to provide audio/data signals to accompany transmitted video signals, the transmitter comprising: means to input a transmitted audio/data signal comprising a stream of digital elements formed into a plurality of frames, each frame comprising three sections, namely a section to indicate the start of a frame, a section to contain control information and a section to contain the audio/data information; means to de-interleave the audio/data information section of a frame, the de-interleave means comprising means to change the sequence of digital elements as transmitted according to a predetermined relationship such as to produce a sequence for output by the television receiver, the de-interleave means comprising storage means to hold a plurality of frames of audio/data signals, counter means to effect input of audio/data signals to, and their output from, the storage means, and logic-circuit means to effect re-configuring of the counter means between one mode for effecting input of the signals to the storage means and another mode for effecting their output therefrom; and means to display the resultant audio/data signal in association with a video signal.
Claim 7
Dependent Claim
26 words
A television receiver according to Claim 4, comprising de-interleave means to de-interleave the audio/data information section, but not the indication and control sections, of a frame.
Claim 8
Dependent Claim
22 words
A television receiver according to Claim 4 or 5, comprising de-interleave means to de-interleave only the audio/data information section of a frame.
Claim 9
Dependent Claim
164 words
A transmitter for a transmission system to provide audio/data signals to accompany transmitted video signals, the transmitter comprising: means to input a transmitted audio/signal comprising a stream of digital elements formed into a plurality of frames, each frame comprising three sections, namely a section to indicate the start of a frame, a section to contain control information and a section to contain the audio/data information; means to interleave the audio/data information section of a frame, the interleave means comprising means to change the sequence of digital elements as input according to a predetermined relationship such as to produce a sequence for transmission, the interleave means comprising storage means to hold a plurality of frames of audio/data signals, counter means to effect input of audio/data signals to, and their output from, the storage means, and logic-circuit means to effect re-configuring of the counter means between one mode for effecting input of the signals to the storage means and another mode for effecting their output therefrom.
Claim 10
Dependent Claim
164 words
A transmitter for a transmission system to provide audio/data signals to accompany transmitted video signals, the transmitter comprising: means to input a transmitted audio/signal comprising a stream of digital elements formed into a plurality of frames, each frame comprising three sections, namely a section to indicate the start of a frame, a section to contain control information and a section to contain the audio/data information; means to interleave the audio/data information section of a frame, the interleave means comprising means to change the sequence of digital elements as input according to a predetermined relationship such as to produce a sequence for transmission, the interleave means comprising storage means to hold a plurality of frames of audio/data signals, counter means to effect input of audio/data signals to, and their output from, the storage means, and logic-circuit means to effect re-configuring of the counter means between one mode for effecting input of the signals to the storage means and another mode for effecting their output therefrom.
Claim 11
Dependent Claim
25 words
A transmitter according to Claim 7, comprising interleave means to interleave the audio/data information section, but not the indication or control sections, of a frame.
Claim 12
Dependent Claim
19 words
A transmitter according to Claim 5, comprising interleave means to interleave only the audio/data information section of a frame.
References Cited (Backward Citations)
No citation records indexed.
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