Recording and reproducing apparatus
First Claim
Patent Images
1. A recording and reproducing apparatus provided with a function for recording and reproducing index signals, comprising:
- a memory storing video data;
memory control means for thinning the video data and writing them in a part of said memory, thereby preparing a multi-screen containing a plurality of video data items;
correlation detecting means for obtaining a correlation between images from the data stored in said memory and the data of a video signal to be recorded or reproduced; and
control means for performing recording of an index signal and/or storing of the video signal in said memory when the correlation is not more than a specified value.
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Abstract
In program retrieval using a magnetic tape in which programs are classified by index signals recorded on the tape, an image at the beginning of each program is displayed in a list on a multi-screen, and a desired program is directly selected using a count value of index signals. In recording, an index signal is recorded at a starting point of recording. When preparing a multi-screen at the time of reproducing, an image reproduced a predetermined time after detection of an index signal is reduced and stored in a memory.
192 Citations
40 Claims
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1. A recording and reproducing apparatus provided with a function for recording and reproducing index signals, comprising:
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a memory storing video data; memory control means for thinning the video data and writing them in a part of said memory, thereby preparing a multi-screen containing a plurality of video data items; correlation detecting means for obtaining a correlation between images from the data stored in said memory and the data of a video signal to be recorded or reproduced; and control means for performing recording of an index signal and/or storing of the video signal in said memory when the correlation is not more than a specified value. - View Dependent Claims (2)
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3. An apparatus for preparing a multi-screen, comprising:
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a video input, a video data head for writing to and reading from a tape, a record selecting switch selecting a signal to be recorded from a plurality of recording input signals, a recording circuit inputting a signal from said record selecting switch and supplying a record signal to said video data head, a reproducing circuit receiving a signal from said video data head and outputting reproduced video data, a recording/reproducing switch switching the video data head between said recording circuit and said reproducing circuit, a memory receiving reproduced video data from said reproducing circuit, a memory controller thinning video data frames in said memory and writing thinned video data frames to said memory to prepare the multi-screen, an image correlation circuit correlating video data from said reproducing circuit and video data already stored in said memory, and a control unit storing the video data from said reproducing circuit in said memory as part of the multi-screen if said correlation is not more than a predetermined value. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for preparing a multi-screen, comprising:
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a video input, a video data head for writing to and reading from a tape, a record selecting switch selecting a signal to be recorded from a plurality of recording input signals, a recording circuit inputting a signal from said record selecting switch and supplying a record signal to said video data head, a reproducing circuit receiving a signal from said video data head and outputting reproduced video data, a recording/reproducing switch switching the video data head between said recording circuit and said reproducing circuit, a memory receiving reproduced video data from said reproducing circuit, a memory controller thinning video data frames in said memory and writing thinned video data frames to said memory to prepare the multi-screen, and a controller controlling said memory to store video data from said memory input switch each time a specified time period elapses, wherein said specified time period is a program length of either a program to be recorded or of a recorded program. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An apparatus for preparing a multi-screen, comprising:
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a video input, a video data head for writing to and reading from a tape, a record selecting switch selecting a signal to be recorded from a plurality of recording input signals, a recording circuit inputting a signal from said record selecting switch and supplying a record signal to said video data head, a reproducing circuit receiving a signal from said video data head and outputting reproduced video data, a recording/reproducing switch switching the video data head between said recording circuit and said reproducing circuit, a memory receiving reproduced video data from said reproducing circuit, a memory controller thinning video data frames in said memory and writing thinned video data frames to said memory to prepare the multi-screen, a detector detecting whether an audio mode of the video input changes, wherein said memory controller writes thinned data frames in said memory when said detector detects a change in the audio mode of the video input. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification