Patent EP0128426A2 successfully refreshed from Google Patents.
EP0128426A2
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EP
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Video signal recording and reproducing apparatus
Assignee: Sony Corp
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Filing: 1984-05-24
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Granted: —
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Expires: 2004-05-24
Abstract
Abstract The video signal recording and reproducing apparatus used with a disc (1) as recording medium comprises a head assembly (12), disc rotating means (3) for rotating the disc (1) in relation to the head assembly (12), a signal path extending from an input terminal (5) to which a video signal (V) to be recorded is supplied to the head assembly (12), a first control circuit (8) for controlling the disc rotating means (3) so as to cause the disc (1) to have the rotation varying in response to the phase of a synchronous signal, such as a horizontal synchronous signal (F H ) in the video signal (V) supplied to the input terminal (5), variable delay means (9) provided in the signal path for delaying the video signal (V) supplied to the input terminal (5) to vary the time base thereof, and a second control circuit (16) for controlling the delay time in the variable delay means (9) so as to cause the video signal (V') derived from the variable delay means (9) to have a time base varying in response to the phase of a reference signal, such as a horizontal reference signal (Sn') reproduced from the disc (1) through the head assembly (12).
Inventors
- 👤 Tadashi Motoyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 13:14
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/08; G11B7/09; G11B7/095; G11B27/00; G11B27/02; G11B27/022; G11B27/026; G11B27/10; G11B7/004; H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/95; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2537; G11B2220/2587
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
297 words
A video signal recording and reproducing apparatus for recording a video signal on a disc (1) with a record track (la,lb) formed thereon and reproducing a video signal from the record track on the disc (1), comprising; a head assembly (12) ccntaining recording and reading portions, disc rotating means (3) for driving the disc (1) to rotate in relation to said head assembly (12), a signal path extending from an input terminal (5) supplied with the video signal to be recorded to the recording portion in said head assembly (12), characterized by first control circuit means (8;31,41,42) supplied with at least a first reference signal (S V ',S H `; R V ,S l ') reproduced from the disc through the reading portion in said head assembly (12) and a first synchronous signal (F v ) in the video signal supplied to said input terminal (5), and controlling said disc rotating means (3) so as to cause the disc (1) to have the rotation varying in response to the phase of said first synchronous signal, variable delay means (9;20,21,22) provided in said signal path for delaying the video signal (V) supplied to said input terminal (5) to vary the time base thereof, and second control circuit means (16,14;23,24; 38,39,30 or 44) supplied with a second reference signal (S H ';R H ) reproduced from the disc (1) through the reading portion in said head assembly (12) and a second synchronous signal (F H ;F H `) in the video signal (V) for controlling thedelay time in said variable delay means (9) so as to cause the video signal (VI derived from said variable delay means (9) to having a time base varying in response to the phase of said second reference signal (S H `,R H ).
Claim 2
Dependent Claim
297 words
A video signal recording and reproducing apparatus for recording a video signal on a disc (1) with a record track (la,lb) formed thereon and reproducing a video signal from the record track on the disc (1), comprising; a head assembly (12) ccntaining recording and reading portions, disc rotating means (3) for driving the disc (1) to rotate in relation to said head assembly (12), a signal path extending from an input terminal (5) supplied with the video signal to be recorded to the recording portion in said head assembly (12), characterized by first control circuit means (8;31,41,42) supplied with at least a first reference signal (S V ',S H `; R V ,S l ') reproduced from the disc through the reading portion in said head assembly (12) and a first synchronous signal (F v ) in the video signal supplied to said input terminal (5), and controlling said disc rotating means (3) so as to cause the disc (1) to have the rotation varying in response to the phase of said first synchronous signal, variable delay means (9;20,21,22) provided in said signal path for delaying the video signal (V) supplied to said input terminal (5) to vary the time base thereof, and second control circuit means (16,14;23,24; 38,39,30 or 44) supplied with a second reference signal (S H ';R H ) reproduced from the disc (1) through the reading portion in said head assembly (12) and a second synchronous signal (F H ;F H `) in the video signal (V) for controlling thedelay time in said variable delay means (9) so as to cause the video signal (VI derived from said variable delay means (9) to having a time base varying in response to the phase of said second reference signal (S H `,R H ).
Claim 3
Dependent Claim
90 words
A video signal recording and reproducing apparatus according to Claim 1, wherein said first control circuit means comprises phase comparing means (31) for performing phase comparison between a vertical reference signal (R V ,G') reproduced from the disc (1) and a vertical synchronous signal (F V ) separated from the video signal (V) supplied to said input terminal (5), and control signal generating means (42) for producing a control signal in response to the result of the phase comparison and supplying the control signal to said disc rotating means (3).
Claim 4
Dependent Claim
89 words
A video signal recording and reproducing apparatus according to Claim 2, wherein said first control circuit means further comprises additional phase comparing means for performing phase comparison between a horizontal reference signal (S H ') reproduced from the disc (1) and a horizontal synchronous signal (F H ) separated from the video signal supplied to said input terminal (5), and wherein said control signal generating means causes said control signal to vary in response to also the result of the phase comparison performed in said additional phase comparing means.
Claim 5
Dependent Claim
128 words
A video signal recording and reproducing apparatus according to Claim 1, wherein said first control circuit means comprises reference signal generating means (33,34,36,40,41) for producing a third reference signal (G') in response to a vertical synchronous signal in a reproduced video signal (VR) obtained from the disc (1) through the reading portion in said head assembly (12), phase comparing means (31) for performing phase comparison between the third reference signal (G') and a vertical synchronous signal (F V ) separated from the video signal (V) supplied to said input terminal (5), and control signal generating means (42) for producing a control signal in response to the result of the phase comparison performed in said phase comparing means and supplying the control signal to said disc rotating means (3).
Claim 6
Dependent Claim
96 words
A video signal recording and reproducing apparatus according to Claim 1, wherein said second control circuit means comprises phase comparing means (14) for performing phase comparison between a horizontal synchronous signal (F H ') separated from the video signal (V') derived from said variable delay means (9) and horizontal reference signal (S H ') reproduced from the disc (1), and control signal generating means (16) for producing a control signal (S 3 ) in response to the result of the phase comparison and supplying the control signal (S 3 ) to said variable delay means (9).
Claim 7
Dependent Claim
165 words
A video signal recording and reproducing apparatus according to Claim 1, wherein said second control circuit means comprises phase comparing means (30;44) for performing phase comparison between a horizontal synchronous signal (R H ) in a reproduced video signal (V R ) obtained from the disc (1) through the reading portion in said head assembly (12) and a horizontal synchronous signal (F H ) separated from the video signal (V) in said signal path, memory means (38) for memorizing the result of the phase comparison performed in said phase comparing means (30;44), and memory control means (39) for writing said result oft he phase comparison in said memory (38) when said reproduced video signal (V R ) is obtained and reading out the memorized result of the phase comparison from said memory (38) to be supplied to said variable delay means (9) when the video signal in said signal path is recorded on the disc (1) via the recording portion in said head assembly (12).
Claim 8
Dependent Claim
89 words
A video signal recording and reproducing apparatus according to Claim 6, wherein said memory control means comprises writing and reading circuit means (39) for generating a writing clock pulse (P w ) and a reading clock pulse (P R ) and supplying them selectively to said memory means (38), and switching means (37;45) connected between said phase comparing means (30;44) and said memory means (38) for supplying said result of the phase comparison to said memory means (38) only when said reproduced video signal (V R ) is obtained.
Claim 9
Dependent Claim
175 words
A video signal recording and reproducing apparatus according to Claim 1, wherein said variable delay means comprises an analog to digital converter (20) for digitalizing the video signal (V) supplied to said input terminal (5), a memory (21) for memorizing a digitalized video signal obtained from said analog to digital converter (20) and a digital to analog converter (22) for converting the digitalized video signal read from said memory (21) into an analog video signal in the analog form, and wherein said second control circuit means comprises writing clock pulse generating means (23) for producing a writing clock pulse (P W ) synchronized with a horizontal synchronous signal (F H ) separated from the video signal (V) supplied to said input terminal (5) to be supplied to said memory (21) and reading clock pulse generating means (24) for producing a reading clock pulse (P r ) synchronized with a horizontal reference signal (S H `) reproduced from the disc (1) through the reading portion in said head assembly (12) to be supplied to said memory.
References Cited (Backward Citations)
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