Method and apparatus for digitally recording and synchronously retrieving a plurality of video signals
First Claim
1. A method for synchronously recording and playing back a plurality of video signals generated by a plurality of externally synchronized video transmitters, in a system connecting said video transmitters to a plurality of digital recorders through a first plurality of transmission lines and further connecting said digital recorders to a playback receiver through a second plurality of transmission lines;
- wherein said playback receiver includes an external sync generator for generating an external sync signal and said digital recorders include each a circuit for receiving and for transferring said external sync signal to said video transmitters; and
each of said video transmitters includes an identification code generator for mixing each of said video signals with an individually allotted identification code signal and each of said digital recorders has a circuit for processing an externally synchronized signal and at least one memory storage device for a routine storing of processed video signals in an endless rotation, the method, comprising the steps of;
propagating said video signals from said video transmitters to said digital recorders through said first plurality of transmission lines and signals selected from the group consisting of said video signals, said processed video signals, playback video signals and a combination thereof, from said digital recorders to said playback receiver through said second plurality of transmission lines, and propagating said external sync signal and a retrieval command signal from said playback receiver to said digital recorders through said second plurality of transmission lines and transferring said external sync signal to said video transmitters through said first plurality of transmission lines;
extracting identification codes from respective video signals and registering the extracted identification codes for playback retrieval;
routinely processing said video signals and storing said processed video signals on the basis of the time and date of said processing into said at least one memory storage device to its capacity, in endless rotation, wherein freshly stored signals replace the oldest stored signals;
generating said retrieval command signal on the basis of a selected time and date and at least one of said identification code for accessing said digital video recorders having commensurating registry of said identification code for synchronously retrieving said selected video signals, wherein said retrieval command signal is selected from the group consisting of a command for monitoring said video signals, a command for monitoring said processed video signals, a command for playback of stored processed video signals and a combination command thereof, and wherein said digital recorders reprocess the retrieved video signals and inject signals corresponding to said registered identification codes and signals corresponding to said selected time and dates into the vertical blanking period of the reprocessed video signals.
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Accused Products
Abstract
A method and apparatus for connecting a plurality of digital video recorders to a plurality of video transmitters via first transmission lines and for connecting the plurality of digital video recorders to a playback receiver via second transmission lines. The playback receiver incorporates an external synchronizing generator for externally synchronizing the plurality of the digital video recorders and the video transmitters. The recorders receiving the video signals generate and inject into the output signals a signal corresponding to identification codes allotted to each video signals. The playback receiver has a selection control circuit receiving selectively and synchronously any individually coded playback or monitored signal, or multiple playback or monitored signals which are displayed individually or in a split screen, respectively. The digital video recorder includes a time-date signal generator and a processing circuit compressing the video signals and outputting them with an injected identification code and time and date of the recorded signals and storing the signal into at least one memory device in an endless rotation, wherein freshly stored signals replace the oldest stored signals.
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Citations
113 Claims
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1. A method for synchronously recording and playing back a plurality of video signals generated by a plurality of externally synchronized video transmitters, in a system connecting said video transmitters to a plurality of digital recorders through a first plurality of transmission lines and further connecting said digital recorders to a playback receiver through a second plurality of transmission lines;
- wherein
said playback receiver includes an external sync generator for generating an external sync signal and said digital recorders include each a circuit for receiving and for transferring said external sync signal to said video transmitters; and
each of said video transmitters includes an identification code generator for mixing each of said video signals with an individually allotted identification code signal and each of said digital recorders has a circuit for processing an externally synchronized signal and at least one memory storage device for a routine storing of processed video signals in an endless rotation, the method, comprising the steps of;
propagating said video signals from said video transmitters to said digital recorders through said first plurality of transmission lines and signals selected from the group consisting of said video signals, said processed video signals, playback video signals and a combination thereof, from said digital recorders to said playback receiver through said second plurality of transmission lines, and propagating said external sync signal and a retrieval command signal from said playback receiver to said digital recorders through said second plurality of transmission lines and transferring said external sync signal to said video transmitters through said first plurality of transmission lines;
extracting identification codes from respective video signals and registering the extracted identification codes for playback retrieval;
routinely processing said video signals and storing said processed video signals on the basis of the time and date of said processing into said at least one memory storage device to its capacity, in endless rotation, wherein freshly stored signals replace the oldest stored signals;
generating said retrieval command signal on the basis of a selected time and date and at least one of said identification code for accessing said digital video recorders having commensurating registry of said identification code for synchronously retrieving said selected video signals, wherein said retrieval command signal is selected from the group consisting of a command for monitoring said video signals, a command for monitoring said processed video signals, a command for playback of stored processed video signals and a combination command thereof, and wherein said digital recorders reprocess the retrieved video signals and inject signals corresponding to said registered identification codes and signals corresponding to said selected time and dates into the vertical blanking period of the reprocessed video signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- wherein
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17. A method for time base corrected recording and synchronously playing back a plurality of video signals generated by plurality of non externally synchronized video transmitters, in a system connecting said video transmitters to a plurality of digital recorders through a first plurality of transmission lines and further connecting said digital recorders to a playback receiver through a second plurality of transmission lines;
- wherein
said playback receiver includes an external sync generator for generating an external sync signal and said digital recorders include each a circuit for applying said external sync signal to a signal processing circuit and to a time base correcting circuit, each said digital recorder includes said time base correcting circuit for correcting the synchronizing signals portion of said video signal, said signal processing circuit, an identification code generator for registering an individually allotted identification code to each of said digital recorders and for generating identification code signals, and at least one memory storage device for routine storing of processed video signals in endless rotation, according to the present invention, the method comprising the steps of;
propagating said video signals from said video transmitters to said digital recorders through said first plurality of transmission lines and signals selected from the group consisting of said time base corrected video signals, said processed video signals, playback video signals and a combination thereof, from said digital recorders to said playback receiver through said second plurality of transmission lines, and propagating said external sync signal and a retrieval command signal from said playback receiver to said digital recorders through said second plurality of transmission lines;
routinely processing said video signals and storing processed video signals on the basis of the time and date of said processing into said at least one memory storage device to its capacity, in an endless rotation, wherein freshly stored signals replace the oldest stored signals;
generating said retrieval command signals on the basis of a selected time and date and at least one said identification code for accessing said digital video recorders having commensurating registry of said identification codes for synchronously retrieving said selected video signals, wherein said retrieval command is selected from the group consisting of a command for monitoring said time base corrected video signal, a command for monitoring said processed video signal, a command for playback of stored processed video signal and a combination thereof and wherein said digital recorders reprocess the retrieved video signals and inject said identification code signals and a signal corresponding to said selected time and dates into the vertical blanking period of the processed video signals. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method for non-externally synchronized recording and synchronously playing back a plurality of video signals generated by a plurality of non externally synchronized video transmitters, in a system connecting said video transmitters to a plurality of digital recorders through a first plurality of transmission lines and further connecting said digital recorders to a playback receiver through a second plurality of transmission lines;
- wherein
said playback receiver includes an external sync generator for generating external sync signal and said digital recorders include each an external synchronizing receiving circuit for applying said external sync signal to a signal processing circuit; and
each said digital video recorder includes an identification code generator for registering an individually allotted identification code to each said digital recorder and for generating identification code signals, an externally synchronized said signal processing circuit and at least one memory storage device for routine storing of processed video signals in endless rotation, according to the present invention, the method comprising the steps of;
propagating said video signals from said video transmitters to said digital recorders through said first plurality of transmission lines and signals selected from the group consisting of said video signals, said processed video signals, playback video signals and a combination thereof, from said digital recorders to said playback receiver through said second plurality of transmission lines, and propagating said external sync signal and a retrieval command signal from said playback receiver to said digital recorders through said second plurality of transmission lines;
routinely processing said video signals and storing a processed video signals on the basis of the time and date of said processing into said at least one memory storage devices to its capacity, in endless rotation, wherein freshly stored signals replaces the oldest stored signals;
generating said retrieval command signals on the basis of a selected time and date and at least one said identification code for accessing said digital video recorders having commensurating registry of said identification codes for synchronously retrieving said selected video signals, wherein said retrieval command is selected from a group consisting of a command for monitoring said video signal, a command for monitoring said processed video signal, a command for playback of stored processed video signal and a combination command thereof and wherein said digital recorders reprocess the retrieved video signals and inject said identification code signals and signals corresponding to said selected time and dates into the vertical blanking period of the reprocessed video signals. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. An apparatus for synchronously recording and playing back a plurality of video signals, comprising:
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a plurality of video cameras for generating video signals connected to plurality of digital video recorders via a plurality of first transmission lines;
said plurality of digital video recorders being connected to a playback receiver via playback control lines and a plurality of second transmission lines for propagating a selection of output video signals selected from said video signals, monitored video signals and playback video signals to said playback receiver and for propagating external synchronizing signals to said plurality of digital video recorders;
said playback receiver including an external synchronizing signal generator and said digital video recorders include each an external sync receiving and transfer circuit for receiving said external synchronizing signal via said second transmission lines for synchronizing said digital video recorders and for transferring said external synchronizing signals to said video cameras through said first transmission lines, thereby synchronizing said television cameras to each other and to said video digital recorders;
each said video camera including a circuit for generating and mixing code signals corresponding to an identification code allotted to each said video camera into each said video signals fed to said digital video recorder;
said digital video recorder including control processing circuits for processing said recording, said playback and said selection of output video signals, time and date generating means for registering the time and dates of the processing of said recording, a decoding/encoding circuit for extracting said identification code from said video signals and for registering said identification code, and a compression/decompression circuit for compressing said video signals and decompressing said selection of output video signals, and at least one memory storage device for routine storing of said compressed signals on the basis of said registered time and dates of said processing in an endless rotation to capacity thereof, wherein freshly stored signals replace the oldest stored signals;
said decoding/encoding circuit generating and injecting signals corresponding to said registered identification code and signals corresponding to said time and date of said processing into said selection of output video signals;
wherein said playback receiver includes control keys for generating recall commands for recalling said selection of output video signals from said plurality of digital video recorders and propagating said recall commands via said playback control lines, and wherein said recall commands are generated on the basis of said registry of said identification codes, selected from an individual identification code command, multiple identification codes command and said time and dates. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
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72. An apparatus for time base corrected recording and synchronous playing back a plurality of video signals, comprising:
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plurality of video cameras for generating video signals connected to a plurality of digital video recorders via plurality of first transmission lines;
said plurality of digital video recorders being connected to playback receiver via playback control lines and a plurality of second transmission lines for propagating a selection of output video signals selected from said video signals, monitored video signals and playback video signals to said playback receiver and for propagating external synchronizing signals to said plurality of digital video recorders;
said playback receiver including an external synchronizing signal generator and said digital video recorders include an external sync receiving circuit for receiving said external synchronizing signal via said second transmission lines for synchronizing processing circuits and time base correcting circuits of said digital video recorders;
each said digital video recorder including control processing circuits for processing said recording, said playback and said selection of output video signals, time and date generating means for registering the time and dates of the processing of said recording, an encoding circuit for generating an identification code allotted to each said video signals fed to said digital video recorder and for registering said identification code, a compression/decompression circuit for compressing said video signals and decompressing said selection of output video signals, and at least one memory storage device for routine storing of said compressed signals on the basis of said registered time and dates of said processing in an endless rotation to capacity thereof, wherein freshly stored signals replace the oldest stored signals;
said encoding circuit generating and injecting signals corresponding to said registered identification code and signals corresponding to said time and date of said processing into said selection of output video signals;
wherein said playback receiver includes control keys for generating recall commands for recalling said selection of output video signals from said plurality of digital video recorders and propagating said recall commands via said playback control lines and wherein said recall commands are generated on the basis of said registry of said identification codes, selected from an individual identification code command, multiple identification codes command and said time and dates. - View Dependent Claims (73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92)
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93. An apparatus for non-externally synchronized recording and synchronous playing back a plurality of video signals, comprising:
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a plurality of video cameras for generating video signals connected to a plurality of digital video recorders via plurality of first transmission lines;
said plurality of digital video recorders connected to a playback receiver via playback control lines and a plurality of second transmission lines for propagating a selection of output video signals selected from said video signals, monitored video signals and playback video signals to said playback receiver and for propagating external synchronizing signals to said plurality of digital video recorders;
said playback receiver including an external synchronizing signal generator and said digital video recorders include an external sync receiving circuit for receiving said external synchronizing signal via said second transmission lines for synchronizing processing circuits of said video digital recorders;
each said digital video recorder includes control processing circuits for processing said recording, said playback and said selection of output video signals, time and date generating means for registering the time and dates of the processing of said recording, an encoding circuit for generating an identification code allotted to said video signals fed to said digital video recorder and for registering said identification code, a compression/decompression circuit for compressing said video signals and decompressing said selection of output video signals, and at least one memory storage device for routine storing of said compressed signals on the basis of said registered time and dates of said processing in an endless rotation to capacity thereof, wherein freshly stored signals replaces the oldest stored signals;
said encoding circuit generating and injecting signals corresponding to said registered identification code and signals corresponding to said time and date of said processing into said selection of output video signals;
wherein said playback receiver includes control keys for generating recall commands for recalling said selection of output video signals from said plurality of digital video recorders and propagating said recall commands via said playback control lines and wherein said recall commands are generated on the basis of said registry of said identification codes, selected from an individual identification code command, multiple identification codes command and said time and dates. - View Dependent Claims (94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113)
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Specification