Digital television signal processing and transmission system

Claim 2

In combination in means for processing and transmitting a television signal; an analog-to-digital converter for generating sampled digital values of a television signal; a current line memory connected to a previous line memory means for storing the digital values for a current and previous television signal line, respectively; a prior frame code group memory for storing the code group transmitted during corresponding lines of a prior frame; microprocessor means connected to said analog-to-digital converter to said current line and previous line memories, and to said prior frame code group memory, said microprocessor means including code generating means for generating predetermined code groups signalling a correspondence between the sampled television line being processed, a previous line stored in said previous line memory or the corresponding line of the previous frame stored in said memory therefor, intra-line code producing means for generating coding characterizing changes within a line, and code output supplying means for selecting the outgoing code group from the outputs of said code generating means and said intra-line code producing means.

Claim 3

A combination as in claim 1, further comprising synchronizing signal detecting means receiving the television signal being processed and having an output connected to said microprocessor, said microprocessor including sync code supplying means for supplying a code signalling the incidence of said synchronizing pulses to said code output supplying means.

Claim 4

A combination as in claim 1 or 2, further comprising a transmitter, and a plural level modulator connecting said microprocessor and said transmitter.

Claim 5

A combination as in claim 1, further comprising at least one receiver means including means for receiving the output of said television signal processing and transmitting means, and restoring means for restoring the received signal to conventional television signal format in sampled digital form.

Claim 6

A combination as in claim 4, wherein said receiver means includes prior frame code group and current line memories, a microprocessor connected to said prior frame and current line memories and including means responsive to the received signal and the contents of said prior frame memory for generating sampled digital values of current line video information for entry in said current line memory.

Claim 7

A combination as in claim 5, wherein said receiver means further comprises a carrier oscillator and modulator, and a digital-to-analog converter coupling said restored signal to said modulator.

Claim 8

A combination as in claim 6, wherein said receiver means further comprising a sync generator enabled by said microprocessor receiving a synchronizing signal incidence code for supplying synchronizing signal wave.

Claim 9

In combination in television signal processing means; transmitter means including a microprocessor, and coding means for generating a digital encoding for each line of a video wave, said digital encoding occupying a variable period dependent upon the line wave intelligence, said coding means including converting means for converting an incoming video wave to digital form, said microprocessor including code generating means connected to said converting means for generating a sync interval outgoing code for such intervals and for providing an outgoing digital encoding characterizing the line of video information then being processed; said code generating means comprising first means for signalling a correspondence between a video line being processed and a stored prior line, second means for generating a series of variable duration signal line change encoding signals characterizing a line being processed, and output means for operatively selecting the generated output of said first means when a correspondence is determined and, in the absence of such a correspondence, operatively selecting the output of said second means; sync detecting means connected to said microprocessor for indicating thereof the incidence of sync intervals; and at least one receiver means coupled to said transmitter means and including a microprocessor including means for reconverting said outgoing digital encoding to a standard video format and synchronizing signal generating means connected to an output of said receiver microprocessor.

Claim 10

In combination in television signal processing means; transmitter means including a microprocessor, and coding means for generating a digital encoding for each line of a video wave, said digital encoding occupying a variable period dependent upon the line wave intelligence, said coding means including converting means for converting an incoming video wave to digital form, said microprocessor including code generating means connected to said converting means for generating a sync interval outgoing code for such intervals and for providing an outgoing digital encoding characterizing the line of video information then being processed; said code generating means comprising first means for signalling a correspondence between a video line being processed and a stored prior line, second means for generating a series of variable duration signal line change encoding signals characterizing a line being processed, and output means for operatively selecting the generated output of said first means when a correspondence is determined and, in the absence of such a correspondence, operatively selecting the output of said second means; sync detecting means connected to said microprocessor for indicating thereof the incidence of sync intervals; and at least one receiver means coupled to said transmitter means and including a microprocessor including means for reconverting said outgoing digital encoding to a standard video format and synchronizing signal generating means connected to an output of said receiver microprocessor.

Claim 11

A combination as in claim 8, wherein each of said transmitter means and receiver means includes a microprocessor.

Claim 12

A combination as in claim 9, wherein each of said transmitter and receiver means includes a current line memory, and a previous frame memory for storing encoded line information for the previous video frame.

Claim 13

A combination as in claim 8, wherein said transmitter means further includes a transmitter, and a multilevel modulator connecting said transmitter microprocessor and said transmitter.