Record disc of video and audio information for stop-motion playback and methods and apparatus for making and playing such a record disc

Claim 3

A method as claimed in Claim 1, in which the record is made on a disc having substantially circular concentric tracks, and the two portions of the composite signal are recorded on successive tracks, in which a special code signal is added in the composite signal to indicate the number of times the video signal is to be reproduced, in which the time compression is by converting the audio signal to a digital signal with a low bit rate, storing the digital signal, and extracting the stored digital signal at a high bit rate, and in which a number of successive audio signals constituting bit packets are interleaved with video synchronising signals.

Claim 4

Apparatus for making a video and audio record including means arranged to compress an audio signal in time, and means arranged to produce at an output the compressed audio signal and a corresponding video signal in succession.

Claim 5

Apparatus for making a video and audio record including means arranged to compress an audio signal in time, and means arranged to produce at an output the compressed audio signal and a corresponding video signal in succession.

Claim 6

Apparatus for formatting an analog audio signal and a corresponding frame of a video signal into a special composite signal for recording on a record disc in a succession of substantially- circular and concentrically arranged recording tracks, wherein the disc is recorded in a format suitable for stop-motion playback, with the video frame being displayed in a repeated fashion a prescribed number of times, while accompanied by a playback of the audio signal, said apparatus comprising; means for converting the analog audio signal to a relatively low bit rate digital audio signal; memory means for storing the data included in said low bit rate digital audio signal; means for extracting the data stored in said memory means to produce a succession of bit packets having a relatively high bit rate; means for interleaving the successive bit packets with conventional video synchronising signals that include periodic chrominance burst signals having a prescribed frequency, to produce a time- compressed audio signal, said relatively high bit rate being synchronised with the prescribed frequency of said chrominance burst signals, wherein said time-compressed audio signal is coupled to an output terminal to produce a first portion of the special composite signal said first portion having a prescribed duration such that it is recorded substantially entirely on a first recording track on the record disc; and means operable after said means for extracting, for coupling the video signal to the output terminal to produce a second portion of the special composite signal, said second portion having a predetermined duration such that it is recorded entirely on a second recording track on the record disc; whereby apparatus for playing the recorded disc can operate to re-create the analog audio signal while the recorded frame of the video signal is being displayed, in a repeated fashion, a prescribed number of times.

Claim 7

Apparatus for formatting an analog audio signal and a corresponding frame of a video signal into a special composite signal for recording on a record disc in a succession of substantially- circular and concentrically arranged recording tracks, wherein the disc is recorded in a format suitable for stop-motion playback, with the video frame being displayed in a repeated fashion a prescribed number of times, while accompanied by a playback of the audio signal, said apparatus comprising; means for converting the analog audio signal to a relatively low bit rate digital audio signal; memory means for storing the data included in said low bit rate digital audio signal; means for extracting the data stored in said memory means to produce a succession of bit packets having a relatively high bit rate; means for interleaving the successive bit packets with conventional video synchronising signals that include periodic chrominance burst signals having a prescribed frequency, to produce a time- compressed audio signal, said relatively high bit rate being synchronised with the prescribed frequency of said chrominance burst signals, wherein said time-compressed audio signal is coupled to an output terminal to produce a first portion of the special composite signal said first portion having a prescribed duration such that it is recorded substantially entirely on a first recording track on the record disc; and means operable after said means for extracting, for coupling the video signal to the output terminal to produce a second portion of the special composite signal, said second portion having a predetermined duration such that it is recorded entirely on a second recording track on the record disc; whereby apparatus for playing the recorded disc can operate to re-create the analog audio signal while the recorded frame of the video signal is being displayed, in a repeated fashion, a prescribed number of times.

Claim 8

A record of video and audio information having in successive portions, a succession of segments of audio information in time-compressed form, and a segment of video information constituting one video frame.

Claim 9

A record of video and audio information having in successive portions, a succession of segments of audio information in time-compressed form, and a segment of video information constituting one video frame.

Claim 10

A record as claimed in Claim 5 in the form of a disc having a succession of substantially circular concentric tracks, the successive information segments alternating between audio information segments, and corresponding video information segments on adjacent tracks, the audio information segments including packets of digital data interleaved with video synchronising signals,.which video synchronising signals include periodic chrominance burst signals, the bit rate of the digital data in the audio information segments being synchronised with the frequency of the chrominance burst signals.

Claim 11

A method of playing a record as claimed in Claim 5 in which the time-compressed segments of audio information are read and stored in a memory, the segment of video information is reproduced repeatedly, and the stored audio information segments are reproduced at normal (time-expanded), rates simultaneously with the repeated reproduction of the video information.

Claim 12

A method as claimed in Claim 7 in which the record is a disc having a succession of substantially circular concentric tracks, the time-compressed audio segments being recorded on one track, and the video segment being recorded on an adjacent track, the audio segments being interleaved with periodic video synchronisation signals, the method including the step of separating the audio information from the video synchronising signals to produce a succession of information packets for storage.

Claim 13

Apparatus for playing a record as claimed. in Claim 5 including a reader of the information, a memory arranged to store the time-compressed audio information segments, means arranged to reproduce the segment of video information repeatedly a number of times as identified on the record equal to the number of audio segments, and means for simultaneously reproducing the audio information in the segments in time, a normal (time-expanded) rate, synchronised from the information on the record.

Claim 14

Apparatus for playing a record disc having recorded thereon a special composite signal that includes a digitised and time-compressed audio signal recorded on a first track and a video signal representative of a video frame recorded on a second track, wherein the apparatus operates to produce a stop-motion display of the video frame represented by the recorded video signal, while accompanied by an analog audio signal corresponding to the recorded time-compressed audio signal, said apparatus comprising; means for scanning the record disc to recover the time-compressed audio signal from the first track thereon, said time-compressed audio signal having a relatively high bit rate; wherein the digital data included in the time-compressed audio signal recorded on the first track on the record disc is interleaved with conventional periodic video synchronisation signals that include periodic chrominance burst signals having a prescribed frequency, and wherein the bit rate of the time-compressed audio signal is synchronised with the prescribed frequency of the chrominance burst signals; means for separating the digital data from the synchronisation signals of the time-compressed audio signal recovered from the disc, to produce a succession of packets of digital data; memory means for storing the successive packets of digital data derived from the recovered time-comprssed audio signal said means for scanning being further operable, after the time-compressed audio signal has been recovered, to recover the video signal from the second track on the record disc; means for displaying in a repeated fashion, the video frame represented by the recovered video signal; means, operable simultaneously with said means for displaying, for extracting the digital data from said memory means to produce an intermediate digital signal corresponding to the time-compressed audio signal, said intermediate signal having a relatively low bit rate; and delta demodulation means for converting the intermediate digital signal to the corresponding analog audio signal, for playback simultaneous with the repeated display of the video frame.

Claim 15

Apparatus for playing a record disc having recorded thereon a special composite signal that includes a digitised and time-compressed audio signal recorded on a first track and a video signal representative of a video frame recorded on a second track, wherein the apparatus operates to produce a stop-motion display of the video frame represented by the recorded video signal, while accompanied by an analog audio signal corresponding to the recorded time-compressed audio signal, said apparatus comprising; means for scanning the record disc to recover the time-compressed audio signal from the first track thereon, said time-compressed audio signal having a relatively high bit rate; wherein the digital data included in the time-compressed audio signal recorded on the first track on the record disc is interleaved with conventional periodic video synchronisation signals that include periodic chrominance burst signals having a prescribed frequency, and wherein the bit rate of the time-compressed audio signal is synchronised with the prescribed frequency of the chrominance burst signals; means for separating the digital data from the synchronisation signals of the time-compressed audio signal recovered from the disc, to produce a succession of packets of digital data; memory means for storing the successive packets of digital data derived from the recovered time-comprssed audio signal said means for scanning being further operable, after the time-compressed audio signal has been recovered, to recover the video signal from the second track on the record disc; means for displaying in a repeated fashion, the video frame represented by the recovered video signal; means, operable simultaneously with said means for displaying, for extracting the digital data from said memory means to produce an intermediate digital signal corresponding to the time-compressed audio signal, said intermediate signal having a relatively low bit rate; and delta demodulation means for converting the intermediate digital signal to the corresponding analog audio signal, for playback simultaneous with the repeated display of the video frame.