EP0021783A1 — Recorder, player, method of recording and video r…

Claim 1

Independent Claim 132 words

A video recorder comprising a recording-medium head (44); a drive (42,46) for moving the head with respect to a record (40); a video signal processer arranged to produce a recorder-enabling signal (72) during each frame of an original video program that is to be recorded and a frame repeat count (72) indicative of the number of times that each such frame is to be played during subsequent reproduction; an audio signal processer for producing a plurality of audio channels delayed in time with respect to each other by increments of one frame time; means (64) for combining the plurality of audio channels with the original video program and the frame repeat count, and means for selectively enabling said drive and said head in accordance with the state of the recorder enabling signal.

Claim 2

Dependent Claim 132 words

A video recorder comprising a recording-medium head (44); a drive (42,46) for moving the head with respect to a record (40); a video signal processer arranged to produce a recorder-enabling signal (72) during each frame of an original video program that is to be recorded and a frame repeat count (72) indicative of the number of times that each such frame is to be played during subsequent reproduction; an audio signal processer for producing a plurality of audio channels delayed in time with respect to each other by increments of one frame time; means (64) for combining the plurality of audio channels with the original video program and the frame repeat count, and means for selectively enabling said drive and said head in accordance with the state of the recorder enabling signal.

Claim 3

Dependent Claim 75 words

A video recorder as claimed in Claim 1, wherein the video signal processer includes means for producing a pre-processed video program (32) containing an indication of boundaries between selected.sets of consecutive frames; means (68) for counting the frames ·in each set of the pre-processed video program, generating a frame repeat count for each set and the recorder enabling signal for each set; and means for encoding the frame repeat count with the pre-processed video program.

Claim 4

Dependent Claim 54 words

A video recording system as claimed in Claim 1 or Claim 2 including an analyser (28) of the original video program arranged to determine which frames shall be recorded, and how many times each such frame is to be played, in dependence on the amount of movement in the corresponding part of the program.

Claim 5

Dependent Claim 78 words

A video recorder as claimed in any preceding claim, wherein the means for combining the plurality of audio channels with the original.video program and the frame repeat count, comprises: a plurality of audio multi-plexers (58) for multiplexing pairs of said audio channels, a plurality of subcarrier modulators (62) each of which modulates a multiplexed pair of said audio channels, and a modulator (64) for combining the modulated subcarrier signals with the video signal containing encoded frame repeat counts.

Claim 6

Dependent Claim 74 words

A video recorder as claimed in any preceding claim, wherein: said recording medium is a video recording disc; said recording head includes a laser light source (48) and a laser modulator (50) for producing a laser writing beam; said drive means includes rotational drive means (42) for rotating said disc and translational drive means (46) for translating the writing beam radially with respect for translating the writing beam radially with respect to said disc.

Claim 7

Dependent Claim 50 words

A video disc recorder system as claimed in any preceding claim, wherein the frame repeat counts are inserted in vertical blanking intervals of the combined signal by generating high-frequency signal bursts and combining the signal bursts with with pre- processed video signal in a selected line of the vertical blanking.interval.

Claim 8

Dependent Claim 126 words

A player for a video record comprising a reading head (90); a drive (82,100) for moving the reading head with respect to the record (80), a decoder (162) of frame repeat counts encoded in the recorded'video signal (94); means (194) responsive to the decoded repeat count for controlling the reading head. in such a manner as to read each frame of video information a selected number of times; a separator and decoder (106,108,110) of a plurality of audio channels recorded with each frame of video information which is to be repeated, and a selector (130,132) of the appropriate one of the audio channels for reproduction, based upon the value of the decoded repeat count and the number of times that a frame has already been played.

Claim 9

Dependent Claim 126 words

A player for a video record comprising a reading head (90); a drive (82,100) for moving the reading head with respect to the record (80), a decoder (162) of frame repeat counts encoded in the recorded'video signal (94); means (194) responsive to the decoded repeat count for controlling the reading head. in such a manner as to read each frame of video information a selected number of times; a separator and decoder (106,108,110) of a plurality of audio channels recorded with each frame of video information which is to be repeated, and a selector (130,132) of the appropriate one of the audio channels for reproduction, based upon the value of the decoded repeat count and the number of times that a frame has already been played.

Claim 10

Dependent Claim 117 words

A player as claimed in Claim 8, wherein said means responsive to the decoded repeat count includes: an up/down counter (158); means (150) operative when said counter is at a zero count, for incrementing said counter by the value of a decoded frame repeat count: means (154) operative when said counter is at a non-zero count, for decrementing said counter by one for each frame reproduced by said head; and means (194) for generating a read/repeat signal based on the value stored in said counter, wherein said head is directed to read a new frame when the value in said counter is zero, and to repeat a frame when the value in said counter is not zero.

Claim 11

Dependent Claim 33 words

A player as claimed in Claim 8 including means coupling said read/repeat signal to said drive to vary the speed thereof in accordance with the degree to which reproduced video information is repeated.

Claim 12

Dependent Claim 29 words

A player as claimed in Claim 9 wherein said means coupling said read/repeat signal to said drive includes a low-pass filter to minimise sudden speed changes in said drive.

Claim 13

Dependent Claim 39 words

A player as claimed in any of Claims 7-10 including a fast-response translating means capable of maintaining the reading head at a given recording track position, and capable of compensating for lagging or leading movements by said drive .

Claim 14

Independent Claim 175 words

A method of making a video recording comprising the steps of: processing a video program (10) to produce a recorder-enabling signal (72) during each frame of the program that is to be recorded, together with a frame repeat count (74) indicative of the number of times, if any, that each recorded frame is to be repeated during subsequent reproduction; generating from an audio signal (14) accompanying the video program, a plurality of audio channels delayed in time with respect to each other by increments of one frame time; electrically combining selected frames of the video program, the plurality of audio channels, and the frame repeat counts to produce a composite electrical signal; applying the composite electrical signal to a recorder (50); and selectively enabling the recorder in accordance with the recorder-enabling signal (73), to record the selected frames of the video program each with a plurality of the audio channels, whereby when a recorded frame is replayed, a selected one of the audio channels can be simultaneously reproduced in accordance with the frame repeat count.

Claim 15

Independent Claim 175 words

A method of making a video recording comprising the steps of: processing a video program (10) to produce a recorder-enabling signal (72) during each frame of the program that is to be recorded, together with a frame repeat count (74) indicative of the number of times, if any, that each recorded frame is to be repeated during subsequent reproduction; generating from an audio signal (14) accompanying the video program, a plurality of audio channels delayed in time with respect to each other by increments of one frame time; electrically combining selected frames of the video program, the plurality of audio channels, and the frame repeat counts to produce a composite electrical signal; applying the composite electrical signal to a recorder (50); and selectively enabling the recorder in accordance with the recorder-enabling signal (73), to record the selected frames of the video program each with a plurality of the audio channels, whereby when a recorded frame is replayed, a selected one of the audio channels can be simultaneously reproduced in accordance with the frame repeat count.

Claim 16

Dependent Claim 48 words

A method as claimed in Claim 12 in which the program is analysed to determine which frames need to be played, and which need to be repeated, and how many times during playing, and the frame repeat count and recorder-enabling signal are generated in dependence on the analysis

Claim 17

Independent Claim 116 words

A method of replaying a video recording containing selected frames of video information, frame repeat counts each indicative of the number of times a recorded frame is to be reproduced, and a plurality of audio channels delayed in time with respect to each other by increments of one frame time recorded with each frame of video information which is to be repeated, said method comprising; reading the recording; decoding the frame repeat counts; controlling said reading step in accordance with the value of the decoded frame repeat counts, to effect reproduction of each recorded frame one or more times; and selecting the proper audio channel for reproduction with each reproduction of a frame of video information.

Claim 18

Independent Claim 116 words

A method of replaying a video recording containing selected frames of video information, frame repeat counts each indicative of the number of times a recorded frame is to be reproduced, and a plurality of audio channels delayed in time with respect to each other by increments of one frame time recorded with each frame of video information which is to be repeated, said method comprising; reading the recording; decoding the frame repeat counts; controlling said reading step in accordance with the value of the decoded frame repeat counts, to effect reproduction of each recorded frame one or more times; and selecting the proper audio channel for reproduction with each reproduction of a frame of video information.

Claim 19

Dependent Claim 81 words

A record carrying a video recording containing successive frames of video information, frame repeat counts each indicative of the number of times a recorded frame is to be reproduced, and a plurality of audio channels delayed in time with respect to each other by increments of one frame time recorded with each frame of video information which is to be repeated in a manner enabling the appropriate audio channel to be selected for reproduction with each reproduction of a recorded frame.

Claim 20

Dependent Claim 81 words

A record carrying a video recording containing successive frames of video information, frame repeat counts each indicative of the number of times a recorded frame is to be reproduced, and a plurality of audio channels delayed in time with respect to each other by increments of one frame time recorded with each frame of video information which is to be repeated in a manner enabling the appropriate audio channel to be selected for reproduction with each reproduction of a recorded frame.

Recorder, player, method of recording and video record

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