Patent US4808077A successfully refreshed from Google Patents.
EP0789488A2
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EP
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Television receiver, recording and reproduction device, data recording method, and data reproducing method
Assignee: Panasonic Corp
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Filing: 1997-02-07
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Granted: —
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Expires: 2017-02-07
Abstract
Abstract A television receiver comprises a tuner for receiving a television video signal; data storage means including a data storage unit for storing the video signal received by the tuner, for its storage capacity, a writing pointer for time-sequentially writing the video signal into the data storage unit, and a reading pointer for reading the stored video signal; select means for selecting and outputting one of the reproduced video signal output from the data storage means and the video signal received by the tuner; and control means for controlling the data storage means and the select means in response to an external input signal.
Inventors
- 👤 Masamitsu Takagi
- 👤 Yasushi Yoshida
- 👤 Masaaki Fujita
- 👤 Eiichiro Naito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 16:26
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/907; H04N5/765; H04N5/775; H04N5/44; H04N5/78; H04N5/781; H04N5/782; H04N5/783
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
103 words
A television receiver comprising: a tuner for receiving a television video signal; data storage means including; a data storage unit for storing the video signal received by the tuner, for its storage capacity, a writing pointer for time-sequentially writing the video signal into the data storage unit, and a reading pointer for reading the stored video signal, select means for selecting and outputting one of the reproduced video signal output from the data storage means and the video signal received by the tuner; and control means for controlling the data storage means and the select means in response to an external input signal.
Claim 2
Dependent Claim
70 words
A television receiver as defined in claim 1 wherein: when a writing command signal is input as the external input signal, the writing pointer in the data storage means starts writing; and when a reproduction command signal is input as the external input signal, the reading pointer in the data storage means starts reading, and the select means selects and outputs the reproduced video signal from the data storage means.
Claim 3
Dependent Claim
64 words
A television receiver as defined in claim 2 wherein: during a period from the input of the writing command signal to the input of the reproduction command signal, the reading pointer in the data storage means reproduces the video signal which has been output from the tuner at the input of the writing command signal, and outputs the video signal as a still picture.
Claim 4
Dependent Claim
118 words
A television receiver as defined in claim 1 including two tuners for receiving television video signals, wherein: when a writing command signal is input as the external input signal, the select means selects and outputs a video signal received by one of the two tuners (first tuner), and the writing pointer in the data storage means starts writing of a video signal received by the other tuner (second tuner); and when a reproduction command signal is input as the external input signal, the reading pointer in the data storage means starts reading and reproduces the video signal received by the first tuner, and the select circuit selects and outputs the reproduced video signal from the data storage means.
Claim 5
Dependent Claim
143 words
A television receiver as defined in claim 1 including a plurality of tuners for receiving television video signals, wherein: when a writing command signal is input as the external input signal, the select means selects a video signal received by one of the plural tuners (first tuner), and the writing pointer in the data storage means starts writing of a video signal received by another tuner (second tuner); when a channel switching command signal is input as the external input signal, the reading pointer in the data storage means starts reading and reproduces the video signal, which has been received by the second tuner and recorded until the input of the channel switching command signal, at a speed higher than the writing speed of the writing pointer, and the selector means selects and outputs the reproduced video signal from the data storage means.
Claim 6
Dependent Claim
124 words
A television receiver as defined in claim 1 including a plurality of tuners for receiving television video signals, wherein: the data storage means records, simultaneously, video signals received by some of the plural tuners, designated by the external input signal; when a reproduction command signal is input as the external input signal, the data storage means reads, simultaneously, the plural video signals recorded in the data storage means, and the select means selects and outputs the plural video signals read simultaneously; and when a channel decision signal is input as the external input signal, the select means selects, from the plural reproduced video signals, only the reproduced video signals which have been received and recorded by the tuners designated by the channel decision signal.
Claim 7
Dependent Claim
82 words
A television receiver as defined in claim 1 including a plurality of tuners for receiving television video signals, wherein: the data storage means records, simultaneously, video signals received by some of the plural tuners, designated by the external input signal; and when a reproduction command signal is input as the external input signal, the data storage means reads, simultaneously, the plural video signals recorded in the data storage means, and the select means selects and outputs the plural video signals read simultaneously.
Claim 8
Dependent Claim
79 words
A television receiver as defined in any of claims 2, 4, 6, and 7, wherein: when the reproduction command signal is input, the reading pointer reads the video signal at a speed higher than the writing speed of the writing pointer until the address of the reading pointer meets the address of the writing pointer; and when the address of the reading pointer meets the address of the writing pointer, the select means selects an output from the tuner.
Claim 9
Dependent Claim
39 words
A television receiver as defined in any of claims 1 to 8, wherein the data storage unit in the data storage means comprises a ring buffer in which the most significant address is followed by the least significant address.
Claim 10
Dependent Claim
45 words
A recording and reproduction device with playback function comprising: a recording head for recording data on a recording surface of a recording disk; a reproduction head for reproducing the recorded data; and drive control means for driving the recording head and the reproduction head individually.
Claim 11
Dependent Claim
82 words
A data recording method comprising: a first recording step of recording data on tracks on a recording surface of a single-side recording disk, for every second track, while moving a recording head from a prescribed track toward the inner or outer circumference of the disk; and a second recording step of recording data on the remaining tracks which have been skipped in the first recording step, while moving the recording head in the opposite direction to that in the first recording step.
Claim 12
Dependent Claim
97 words
A data recording method comprising: a first recording step of recording data on tracks on a first recording surface of a double-side recording disk, using a first recording head, while moving the first recording head and a second recording head from a prescribed track toward the inner or outer circumference of the disk; and a second recording step of recording data on tracks on a second recording surface of the double-side recording disk, using the second recording head, while moving the first and second recording heads in the opposite direction to that in the first recording step.
Claim 13
Dependent Claim
94 words
A method for reproducing data recorded by the data recording method of claim 11, comprising: a first reproduction step of reproducing data recorded on the tracks on the recording surface of the single-side recording disk, for every second track, while moving a reproduction head from a prescribed track toward the inner or outer circumference of the disk; and a second reproduction step of reproducing data from the remaining tracks which have been skipped in the first reproduction step, while moving the reproduction head in the opposite direction to that in the first reproduction step.
Claim 14
Dependent Claim
104 words
A method for reproducing data recorded by the data recording method of claim 11, comprising: a first reproduction step of reproducing data recorded on the tracks on the recording surface of the single-side recording disk, at larger intervals than at the recording, while moving a reproduction head from a prescribed track toward the inner or outer circumference of the disk; and a second reproduction step of reproducing data from the remaining tracks which have been skipped in the first reproduction step, at larger intervals than at the recording, while moving the reproduction head in the opposite direction to that in the first reproduction step.
Claim 15
Dependent Claim
22 words
A data reproducing method as defined in claim 13 wherein the reproduction is performed at a speed higher than the recording speed.
Claim 16
Dependent Claim
111 words
A method for reproducing data recorded by the data recording method of claim 12, comprising: a first reproduction step of reproducing data recorded on the tracks on the first recording surface of the double-side recording disk, using a first reproduction head, which moving the first reproduction head and a second reproduction head from a prescribed track toward the inner or outer circumference of the disk; and a second reproduction step of reproducing data recorded on the tracks on the second recording surface of the double-side recording disk, using the second reproduction head, while moving the first and second reproduction heads in the opposite direction to that in the first reproduction step.
Claim 17
Dependent Claim
119 words
A method for reproducing data recorded by the data recording method of claim 12, comprising: a first reproduction step of reproducing data recorded on the tracks on the first recording surface of the double-side recording disk, for every second track, using a first reproduction head, while moving the first reproduction head and a second reproduction head from a prescribed track toward the inner or outer circumference of the disk; and a second reproduction step of reproducing data recorded on the tracks on the second recording surface of the double-side recording disk, for every second track, using the second reproduction head, while moving the first and second reproduction heads in the opposite direction to that in the first reproduction step.
Claim 18
Dependent Claim
22 words
A data reproducing method as defined in claim 16 wherein the reproduction is performed at a speed higher than the recording speed.
References Cited (Backward Citations)
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