Conditional replenishment video system with sample grouping

Claim 2

In a redundancy reduction system in which plural samples of a signal amplitude are taken during each successive time interval, means for generating an address for each sample which identifies the location of said each sample within its respective time interval, means for generating a signal which identifies selected samples, means for generating a flag word which can be distinguished from sample amplitude values, and means for transmitting in sequence the address and amplitude of a selected sample, the amplitude of all selected samples whose addresses follow the transmitted address, followed by said flag word to indicate the end of a run of selected samples.

Claim 3

In a redundancy reduction system of the type defined in claim 1 wherein said address generating means provides an energizing pulse with each generated address and said means for transmitting in sequence includes a means having a first, a second and a third output, said last-mentioned means being responsive to both said signal which identifies selected samples and said energizing pulse for generating a start-of-run signal at said first output when a selected sample follows a sample not selected, a continuing run signal at said second output when a selected sample follows a selected sample, and an end-of-run signal at said third output when a sample not selected follows a selected sample.

Claim 4

In a redundancy reduction system as defined in claim 2 wherein said means for transmitting in sequence further includes a shift register having a first and a second cell, a first and a second transmission gating means responsive to said start-of-run signal for coupling the amplitude and address of a sample into the first and second cells of said shift register, third gating means responsive to said continuing run signal for coupling the amplitude of a sample into the second cell of said shift register, and fourth gating means responsive to said end-of-run signal for coupling said flag word into the second cell of said shift register, and means responsive to said start-of-run signal, said continuing run signal or said end-of-run signal for shifting information out of said shift register a predetermined interval after information has been entered.

Claim 5

In a redundancy reduction system as defined in claim 2 wherein said means for generating the start-of-run signal, the continuing run signal and the end-of-run signal includes a first delay means for generating a first delayed pulse in response to said energizing pulse, a second delay means for generating a second delayed pulse in response to said first delayed pulse, a flip-flop having a set and a cleared state, means responsive to said identifying signal and said second delayed pulse for setting said flip-flop, means responsive to the absence of said identiFying signal and said second delayed pulse for clearing said flip-flop, a first AND gating means for developing said start-of-run signal in response to the simultaneous presence of said identifying signal, the first delayed pulse and the cleared state of said flip-flop, a second AND gating means for developing a continuing run signal in response to the simultaneous presence of said identifying signal, said first delayed pulse and the set state of said flip-flop, and a third AND gating means for developing an end-of-run signal in response to the absence of said identifying signal, the set state of said flip-flop and said first delayed pulse.

Claim 6

Redundancy reduction transmitting apparatus comprising means for generating a plurality of amplitude samples during each predetermined interval of an input signal, means for generating an address word for each amplitude sample which word indicates the relative position of its respective sample in the predetermined interval of said input signal, means for selecting amplitude samples for transmission, each selected sample being identified by the presence of an energizing signal, means for generating a flag word whose value is distinguishable from all amplitude samples, and means responsive to said energizing signal for transmitting in sequence the address and amplitude of a selected sample, the amplitude of selected samples whose addresses follow the transmitted address, and said flag word.

Claim 7

Redundancy reduction transmitting apparatus comprising means for generating a plurality of amplitude samples during each predetermined interval of an input signal, means for generating an address word for each amplitude sample which word indicates the relative position of its respective sample in the predetermined interval of said input signal, means for selecting amplitude samples for transmission, each selected sample being identified by the presence of an energizing signal, means for generating a flag word whose value is distinguishable from all amplitude samples, and means responsive to said energizing signal for transmitting in sequence the address and amplitude of a selected sample, the amplitude of selected samples whose addresses follow the transmitted address, and said flag word.

Claim 8

Redundancy reduction transmitting apparatus as defined in claim 5 wherein the input signal is a video signal having time intervals called frames and time subintervals called lines and said means for selecting amplitude samples for transmission includes a memory means for storing an entire frame of video samples, a subtractor circuit for taking the difference between the amplitude of each new sample and its corresponding sample in said memory means having the same time position in the frame interval, and means for generating an energizing signal if the difference exceeds a predetermined threshold.

Claim 9

Redundancy reduction transmitting apparatus as defined in claim 6 wherein said means for transmitting in sequence includes a first gating means for generating a start-of-run signal when a selected sample follows a nonselected sample, a second gating means for generating a continuing run signal when a selected sample follows a selected sample, and a third gating means for generating an end-of-run signal when a nonselected sample follows a selected sample.

Claim 10

Redundancy reduction transmitting apparatus as defined in claim 7 wherein said means for transmitting in sequence further includes a shift register having at least a first and a second cell, a first and a second transmission gate for coupling the amplitude and address of a selected sample into said first and second cells of said shift register in response to said start-of-run signal, a third transmission gate for coupling the amplitude of a selected sample into said second cell in response to said continuing run signal, and a fourth transmission gate for coupling said flag word into said second cell in response to said end-of-end signal.