Video disk with multiplexed video and digital information
AssigneePioneer Electronic Corporation
InventorHitoshi Kanamaru
Life of this patent
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Abstract
A recording and reproducing device for frequency division multiplexing of a television video and a digital data signal. The digital signal is interleaved in blocks so that the length of an interleaved block is longer than a video field but shorter than a video frame. The interleaved digital data is recorded so that an end of a group of blocks corresponds to a vertical synchronizing signal for the video signal.
Claims9
A video disk having recorded thereon in frequency division multiplex a television video signal and a digital data signal, wherein said recorded television video signal comprises a series of frames, each frame comprising a plurality of fields having a vertical synchronizing signal at one end thereof:
- wherein said recorded digital data signal is divided into blocks each consisting of a prescribed number of bits and is interleaved, thereby having a recorded length after interleaving longer than one of said fields and shorter than one of said frames;
- and
- wherein an end of said interleaved digital data signal is recorded at a fixed position before one of said vertical synchronizing signals of said recorded television signal.
A recording device for a television video signal and a digital data signal, said television video signal comprising a series of frames, each frame being divided into fields with a vertical synchronizing signal located in each field, said digital data signal being divided into blocks each consisting of a prescribed number of bits, said device comprising:
- means for modulating said television video signal;
- means for interleaving said blocks whereby a length of one of said a interleaved blocks is longer than a length of one of said fields and shorter than a length of one of said frames;
- means for detecting said vertical synchronizing signal;
- means for disposing said interleaved blocks so that an end of one or more interleaved blocks is placed before a vicinity of a position of said detected vertical synchronizing signal;
- means for combining said modulated television video signal and said disposed blocks of said digital data signal;
- and
- means for recording an output of said combining means on a video disk, whereby said television video signal and said digital data signal are recorded in frequency division multiplexing on a same track of said video disk.
A reproduction device for a television video signal and a digital data signal, said television video signal comprising a series of frames, each frame being divided into fields with a vertical synchronizing signal located in each field, said digital data signal being divided into blocks each consisting of a prescribed number of bits and being interleaved, whereby a length of said interleaved block is longer that a length of one of said fields and shorter than a length of one of said frames, said television video signal and said interleaved digital data signal being recorded in time division multiplexing on a same track of a video disk, an end of the recorded digital data signal comprising one or more blocks being recorded before the vicinity of a position of said vertical synchronizing signal, said device comprising:.
- means for producing a reproduction signal from a track of a video disk;
- filter means for separating said television video signal and said digital data signal from said reproduction signal;
- means for reproducing continuously a plurality of said blocks of said digital data signal from their beginning to their end;
- and
- means for reproducing at least one of said frames of said television video signal recorded after one of said vertical synchronizing signals located a fixed position relative to said beginning of said blocks and recorded before a prescribed position of said video signal located after said end of said blocks.
A reproduction device for a television video signal and a digital data signal, said television video signal comprising a series of frames, each frame being divided into fields with a vertical synchronizing signal located in each field, said digital data signal being divided into blocks each consisting of a prescribed number of bits and being interleaved, whereby a length of said an interleaved block is longer that a length of one of said fields and shorter than a length of one of said frames, said television video signal and said interleaved digital data signal being recorded in time division multiplexing on a same track of a video disk, an end of the recorded digital data signal comprising one or more blocks being recorded before the vicinity of a position of said vertical synchronizing signal, said device comprising:
- means for producing a reproduction signal from a track of a video disk;
- filter means for separating said television video signal and said digital data signal from said reproduction signal;
- means for reproducing continuously a plurality of said blocks of said digital data signal from the beginning to the end of said plurality of said blocks;
- means for detecting a beginning and an end of a first group consisting of a prescribed number of fields of said television video signal, said first group corresponding to said reproduced plurality of blocks of said digital data signal;
- and
- means for squelching said television signal when said reproducing means is reproducing blocks of said digital data signal recorded in a section of said track of said video disk other than a section in which is recorded said first group from its said beginning to its said end.
A reproduction device for a television video signal and a digital data signal, said television video signal comprising a series of frames, each frame being divided into fields with a vertical synchronizing signal located in each field, said digital data signal being divided into blocks each consisting of a prescribed number of bits and being interleaved, whereby a length of said an interleaved block is longer that a length of one of said fields and shorter than a length of one of said frames, said television video signal and said interleaved digital data signal being recorded in time division multiplexing on a same track of a video disk, an end of the recorded digital data signal comprising one or more blocks being recorded before the vicinity of a position of said vertical synchronizing signal, a plurality of serially adjacent blocks corresponding to a group of a predetermined number of fields of said television signal, said device comprising:
- means for producing a reproduction signal from a track of a video disk;
- filter means for separating said television video signal and said digital data signal from said reproduction signal;
- means for reproducing continuously a plurality of said blocks of said digital data signal from the beginning to the end of said plurality of said blocks;
- means for detecting a beginning and an end of a first one of said groups of said television video signal, said first group corresponding to said reproduced plurality of blocks of said digital data signal;
- means for repetitively reproducing at least one frame located between said detected beginning and said detected end of said television video signal;
- a memory having a storage capacity not smaller than the contents of at least one block of said digital data signal;
- and
- means for storing in said memory on different repetitive operations of said repetitive reproducing means sequential ones of said blocks of said digital data signal.
A recording method for a television video signal and a digital data signal, said television video signal comprising a series of frames, each frame being divided into fields with a vertical synchronizing signal located in each field, said digital data signal being divided into blocks each consisting of a prescribed number of bits, said method comprising the steps of:
- modulating said television video signal;
- interleaving said blocks whereby a length of one of said interleaved blocks is longer than a length of one of said fields and shorter than a length of one of said frames;
- detecting said vertical synchronizing signal;
- disposing said interleaved blocks so that an end of one or more interleaved blocks is placed before a vicinity of a position of said detected vertical synchronizing signal;
- combining said modulated television video signal and said disposed blocks of said digital data signal;
- and
- recording an output of said combining step on a video disk, whereby said television video signal and said digital data signal are recorded in frequency division multiplexing on a same track of said video disk.
A reproduction method for a television video signal and a digital data signal, said television video signal comprising a series of frames, each frame being divided into fields with a vertical synchronizing signal located in each field, said digital data signal being divided into blocks each consisting of a prescribed number of bits and being interleaved, whereby a length of said interleaved block is longer that a length of one of said fields and shorter than a length of one of said frames, said television video signal and said interleaved digital data signal being recorded in time division multiplexing on a same track of a video disk, an end of the recorded digital data signal comprising one or more blocks being recorded before the vicinity of a position of said vertical synchronizing signal, said device comprising:
- producing a reproduction signal from a track of a video disk;
- separating said television video signal and said digital data signal from said reproduction signal;
- reproducing continuously a plurality of said blocks of said digital data signal from their beginning to their end;
- and
- reproducing at least one of said frames of said television video signal recorded after one of said vertical synchronizing signals located a fixed position relative to said beginning of said blocks and recorded before a prescribed position of said video signal located after said end of said blocks.
A reproduction method for a television video signal and a digital data signal, said television video signal comprising a series of frames, each frame being divided into fields with a vertical synchronizing signal located in each field, said digital data signal being divided into blocks each consisting of a prescribed number of bits and being interleaved, whereby a length of said an interleaved block is longer that a length of one of said fields and shorter than a length of one of said frames, said television video signal and said interleaved digital data signal being recorded in time division multiplexing on a same track of a video disk, an end of the recorded digital data signal comprising one or more blocks being recorded before the vicinity of a position of said vertical synchronizing signal, said method comprising the steps of:
- producing a reproduction signal from a track of a video disk;
- separating said television video signal and said digital data signal from said reproduction signal;
- reproducing continuously a plurality of said blocks of said digital data signal from their beginning to their end;
- detecting a beginning and an end of a first group consisting of a prescribed number of fields of said television video signal, said first group corresponding to said reproduced plurality of blocks of said digital data signal;
- and
- squelching said television signal when said reproducing step is reproducing blocks of said digital data signal recorded in a section of said track of said video disk other than a section in which is recorded said first group from its said beginning to its said end.
A reproduction method for a television video signal and a digital data signal, said television video signal comprising a series of frames, each frame being divided into fields with a vertical synchronizing signal located in each field, said digital data signal being divided into blocks each consisting of a prescribed number of bits and being interleaved, whereby a length of said an interleaved block is longer that a length of one of said fields and shorter than a length of one of said frames, said television video signal and said interleaved digital data signal being recorded in time division multiplexing on a same track of a video disk, an end of the recorded digital data signal comprising one or more blocks being recorded before the vicinity of a position of said vertical synchronizing signal, a plurality of serially adjacent blocks corresponding to a group of a predetermined number of fields of said television signal, said method comprising the steps of:
- producing a reproduction signal from a track of a video disk;
- separating said television video signal and said digital data signal from said reproduction signal;
- reproducing continuously a plurality of said blocks of said digital data signal from their beginning to their end;
- detecting a beginning and an end of a first one of said groups of said television video signal, said first group corresponding to said reproduced plurality of blocks of said digital data signal;
- repetitively reproducing at least one frame located between said detected beginning and said detected end of said television video signal;
- and
- storing in a memory on different repetitive operations of said repetitive reproducing steps sequential ones of said blocks of said digital data signal, said memory having a storage capacity not smaller than the contents of at least one block of said digital data signal.
Dependencies are inferred from the claim text.