Pcm-tv system using a unique word for horizontal time synchronization

Claim 2

A transmission system responsive to TV waveforms and other information for generating an output wavetrain during each horizontal line of said TV waveform, which includes a first group of coded data identifying a horizontal sync pulse, a second group of coded data representing said other information and a third group of data representing the picture information and a third group of data representing the picture information of said TV waveform, said system comprising a. timing circuit means responsive to each horizontal synchronizing pulse in said waveform for generating first, second, and third groups of clock pulses in a predetermined sequence and of predetermined lengths, b. unique word generating means responsive to said first group of clock pulses for generating said first group of coded data, c. rate conversion means responsive to said second group of clock pulses and said other information for generating said second group of coded data and d. TV-PCM means responsive to the picture information in said waveform and said third group of clock pulses for generating said third group of coded data, said first, second and third groups of coded data being combined to form said wave train.

Claim 3

A transmission system as defined in claim 1 wherein said rate conversion means comprises a. a storage memory unit, b. read-in means for reading in said additional information into said storage memory unit, said c. read-out means responsive to said second group of clock pulses for reading out the contents of said storage memory unit at a rate determined by the rate of said clock pulses.

Claim 4

A transmission system as defined in claim 1 wherein said timing circuit means comprises a. a clock pulse generator for generating clock pulses, b. a first gating means responsive to a horizontal sync pulse for passing a first predetermined nunber of clock pulses to a first output terminal thereby forming said first group of clock pulses, said first gating means comprising a sensing means responsive to said first predetermined number of clock pulses appearing at said first output terminal for generating a reset pulse which prevents passage of clock pulses to said first output terminal until the occurrence of another horizontal sync pulse, c. a second gating means responsive to said reset pulse for passing a second predetermined number of clock pulses to a second output terminal thereby forming said second group of clock pulses, said second gating means comprising a sensing means responsive to said second predetermined number of clock pulses appearing at said second output terminal for generating a second reset pulse which prevents passage of clock pulses to said second output terminal until the occurrence of another of said second reset pulses, and d. a third gating means responsive to said second reset pulse for passing a third predetermined number of clock pulses to a third output terminal thereby forming said third group of clock pulses, said third gating means comprising a sensing means responsive to said third predetermined number of clock pulses appearing at said third output terminal for generating a third reset pulse which prevents passage of clock pulses to said third output terminal until the occurrence of another said second reset pulses.

Claim 5

A transmission system as defined in claim 3 wherein said rate conversion means comprises a. a storage memory unit, b. read-in means for reading in said additional information into said storage memory unit, and c. read-out means responsive to said second groups of clock pulses for reading out the contents of said storage memory unit at a rate determined by the rate of said clock pulses.

Claim 6

A transmission system adapted to receive a TV waveform having equalizing pulses, vertical sync pulses, horizontal sync pulses and picture information and other analog information and to transmit in non-overlapping time slots digital signals identifying said equalizing pulses, vertical sync pulses and horizontal sync pulses, digital signals representing said other analog information and digital signals representing said picture information comprising; a. a source of clock pulses for providing output clock pulses, b. means responsive to said TV waveform and having three output terminals for generating horizontal, vertical and equalizing spike pulses on separate ones of said three output terminals, said spikes having at a fixed time relation to the input vertical, horizontal and equalizing pulses respectively, c. an equalizing unique word generator responsive to input clock pulses applied thereto for generating an output code word of fixed format, d. a horizontal unique word generator responsive to input clock pulses applied thereto for generating an output code word of fixed format, e. a vertical unique word generator responsive to input clock pulses applied thereto for generating an output code word of fixed format, f. a TV-PCM means having an input terminal and being responsive to clock pulses applied thereto for generating a digital output representative of the signal applied to said input terminal, g. an analog to digital converter means for converting said other information into digital form, h. a memory, i. means for storing the digital output of said analog-to-digital converter means in said memory, j. read-out means responsive to clock pulses applied thereto for reading out information stored in said memory, k. timing circuit means responsive to said clock pulses and said horizontal, vertical and equalizing spikes for transmitting said clock pulses to said horizontal, vertical and equalizing unique word generators during a first predetermined period of time following said horizontal vertical and equalizing spikes respectively; transmitting said clock pulses to said read-out means for a second predetermined period of time following every horizontal spike and every other vertical and equalizing spike; and transmitting said clock pulses to said TV-PCM means during a third predetermined period of time following said horizontal spikes; said periods of time being non-overlapping and the sum of said first, second and third periods of time being equal to or less than the horizontal line time of said TV waveform, and l. means for connecting the picture information to the input terminal of said TV-PCM means in time coincidence with said third predetermined period of time.

Claim 7

A transmission system adapted to receive a TV waveform having equalizing pulses, vertical sync pulses, horizontal sync pulses and picture information and other analog information and to transmit in non-overlapping time slots digital signals identifying said equalizing pulses, vertical sync pulses and horizontal sync pulses, digital signals representing said other analog information and digital signals representing said picture information comprising; a. a source of clock pulses for providing output clock pulses, b. means responsive to said TV waveform and having three output terminals for generating horizontal, vertical and equalizing spike pulses on separate ones of said three output terminals, said spikes having at a fixed time relation to the input vertical, horizontal and equalizing pulses respectively, c. an equalizing unique word generator responsive to input clock pulses applied thereto for generating an output code word of fixed format, d. a horizontal unique word generator responsive to input clock pulses applied thereto for generating an output code word of fixed format, e. a vertical unique word generator responsive to input clock pulses applied thereto for generating an output code word of fixed format, f. a TV-PCM means having an input terminal and being responsive to clock pulses applied thereto for generating a digital output representative of the signal applied to said input terminal, g. an analog to digital converter means for converting said other information into digital form, h. a memory, i. means for storing the digital output of said analog-to-digital converter means in said memory, j. read-out means responsive to clock pulses applied thereto for reading out information stored in said memory, k. timing circuit means responsive to said clock pulses and said horizontal, vertical and equalizing spikes for transmitting said clock pulses to said horizontal, vertical and equalizing unique word generators during a first predetermined period of time following said horizontal vertical and equalizing spikes respectively; transmitting said clock pulses to said read-out means for a second predetermined period of time following every horizontal spike and every other vertical and equalizing spike; and transmitting said clock pulses to said TV-PCM means during a third predetermined period of time following said horizontal spikes; said periods of time being non-overlapping and the sum of said first, second and third periods of time being equal to or less than the horizontal line time of said TV waveform, and l. means for connecting the picture information to the input terminal of said TV-PCM means in time coincidence with said third predetermined period of time.

Claim 8

Apparatus for decoding pulse coded information of the following periodic format: a digital work representing the horizontal synchronization pulse of a TV waveform; pulse coded TV picture information; and digital data representing other information; said apparatus comprising a. decoder means, having said pulse coded information connected to an input thereof responsive to said digital word for generating a horizontal sync pulse of fixed duration at a first output terminal; b. PCM decoding means, having an input terminal adapted to receive pulse coded data, for providing an analog output of input pulse coded data, c. a second output terminal, d. means having said pulse coded information connected to an input thereof, for extracting said pulse coded TV information and applying it to the input of said TV-PCM means and for eXtracting said digital data representing said other information and applying it to said second output terminal, and e. means for connecting the analog output of said TV-PCM means to said first terminal whereby the beginning of said analog output directly follows in time the termination of said horizontal sync pulse.

Claim 9

Apparatus for decoding pulse coded information of the following periodic format: a digital work representing the horizontal synchronization pulse of a TV waveform; pulse coded TV picture information; and digital data representing other information; said apparatus comprising a. decoder means, having said pulse coded information connected to an input thereof responsive to said digital word for generating a horizontal sync pulse of fixed duration at a first output terminal; b. PCM decoding means, having an input terminal adapted to receive pulse coded data, for providing an analog output of input pulse coded data, c. a second output terminal, d. means having said pulse coded information connected to an input thereof, for extracting said pulse coded TV information and applying it to the input of said TV-PCM means and for eXtracting said digital data representing said other information and applying it to said second output terminal, and e. means for connecting the analog output of said TV-PCM means to said first terminal whereby the beginning of said analog output directly follows in time the termination of said horizontal sync pulse.

Claim 10

Apparatus as claimed in claim 6 further comprising a bit rate convertor means for converting the bit rate of a digital input from a first value to a second value and means for connecting the input of said bit rate converter to said second terminal.

Claim 11

A TV transmission system adapted to encode, transmit receive and reconstruct a television waveform and other information comprising transmission means responsive to said TV waveform for encoding the picture information in said waveform and transmitting said encoded picture information along with horizontal synchronization identifying digital code words and digitally coded other information to a receiver, receiver means responsive to information transmitted by said transmission means for reconstructing said TV waveform and said other information from said transmitted information, said transmission means comprising, a. timing circuit means responsive to horizontal synchronization pulses in said TV waveform for generating first, second, and third non-overlapping groups of clock pulses in a predetermined sequence and of predetermined lengths, b. unique word generating means responsive to said first group of clock pulses for generating said horizontal sync identifying code words, c. rate generating means having said other information applied to an input thereof and responsive to said second group of clock pulses for generating digitally coded other information, d. TV-PCM encoding means having said TV waveform applied to an input thereof and responsive to said third group of clock pulses for generating said encoded picture information, e. and means for combining the outputs from said unique word generating means, said rate conversion means, and said TV-PCM encoding means.

Claim 12

A TV transmission system adapted to encode, transmit receive and reconstruct a television waveform and other information comprising transmission means responsive to said TV waveform for encoding the picture information in said waveform and transmitting said encoded picture information along with horizontal synchronization identifying digital code words and digitally coded other information to a receiver, receiver means responsive to information transmitted by said transmission means for reconstructing said TV waveform and said other information from said transmitted information, said transmission means comprising, a. timing circuit means responsive to horizontal synchronization pulses in said TV waveform for generating first, second, and third non-overlapping groups of clock pulses in a predetermined sequence and of predetermined lengths, b. unique word generating means responsive to said first group of clock pulses for generating said horizontal sync identifying code words, c. rate generating means having said other information applied to an input thereof and responsive to said second group of clock pulses for generating digitally coded other information, d. TV-PCM encoding means having said TV waveform applied to an input thereof and responsive to said third group of clock pulses for generating said encoded picture information, e. and means for combining the outputs from said unique word generating means, said rate conversion means, and said TV-PCM encoding means.

Claim 13

A TV transmission system as claimed in claim 8 wherein said receiving means comprises a. decoder means, having said received information connected to an input thereof, responsive to said horizontal sync identifying code for generating a horizontal sync pulse of fixed duration at a first output terminal, b. TV-PCM decoding means, having an input terminal adapted to receive PCM coded information for providing an analog output of the input PCM coded information, c. a second output terminal, d. means adapted to have said received information applied to an input thereof for extracting said encoded picture information and applying it to the input of said TV-PCM decoding means and for extracting said digitally closed other information and applying it to said second output terminal, and e. means for connecting the analog output of said TV-PCM decoding means to said first terminal whereby the beginning of said analog output directly follows in time the termination of said horizontal sync pulse.