BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a generic schematic diagram of DTV transmitter apparatus that provides for the transmission of ordinary 8VSB signals in time-division multiplex with more robust signals having a code rate 1/N times that of ordinary 8VSB, which robust signals in accordance with the invention are provided with capability for overcoming burst errors as long as N times 520 bytes, N being an integer more than one.
FIG. 2 is a diagram showing the preferred placement of parity bytes in a Reed-Solomon forward-error-correction codeword that will be redundantly coded to occupy two separated segments of data transmitted at one-half of ordinary 8VSB code rate.
FIG. 3 is a schematic diagram showing in more detail a species of the FIG. 1 DTV transmitter apparatus that transmits pseudo-2VSB signals, which P2VSB signals in accordance with an aspect of the invention are provided with capability for overcoming burst errors as long as 1040 bytes.
FIG. 4 is a schematic diagram showing in more detail a species of the FIG. 1 DTV transmitter apparatus that transmits prescribed-coset-pattern-modulation signals of a type previously shown and described in U.S. patent application Ser. No. 10/955,212, which PCPM signals in accordance with an aspect of the invention are provided with capability for overcoming burst errors as long as 1040 bytes.
FIG. 5 is a schematic diagram showing in more detail a species of the FIG. 1 DTV transmitter apparatus that provides for the transmission of more robust signals of quartered code rate in time-division multiplex with ordinary 8VSB signals, which robust signals in accordance with an aspect of the invention are provided with capability for overcoming burst errors as long as 2080 bytes.
FIG. 6 is a diagram showing the preferred placement of parity bytes in Reed-Solomon forward-error-correction codewords that will be redundantly coded to occupy four separated segments of data transmitted at one-quarter of ordinary 8VSB code rate.
FIG. 7 is a generic schematic diagram of DTV transmitter apparatus that provides for the transmission of ordinary 8VSB signals in time-division multiplex with turbo coded signals using parallel turbo coding that has a code rate 1/N times that of ordinary 8VSB, which turbo coded signals in accordance with the invention are provided with capability for overcoming burst errors as long as N times 520 bytes, N being an integer more than one.
FIG. 8 is a generic schematic diagram of DTV transmitter apparatus that provides for the transmission of ordinary 8VSB signals in time-division multiplex with turbo coded signals using serial turbo coding that has a code rate 1/N times that of ordinary 8VSB, which turbo coded signals in accordance with the invention are provided with capability for overcoming burst errors as long as N times 520 bytes, N being an integer more than one.
FIG. 9 is a schematic diagram of a modification made to DTV transmitter apparatus of the types shown in FIGS. 1 and 3, in FIGS. 1 and 4, in FIGS. 1 and 5, in FIG. 7 and in FIG. 8, which modification in accordance with an aspect of the invention provides for supplying DTV receivers with advance information concerning the nature of robust transmissions.
FIG. 10 is a depiction of a halved-code-rate future-field-description signal that the FIG. 9 modification of DTV transmitter apparatus uses for supplying DTV receivers with advance information concerning the nature of robust transmissions.
FIGS. 11 and 12 are depictions of the formats of bit-pairs that the FIG. 10 and FIG. 13 future-field-description signals use for describing first and second sets of characteristics, respectively, of each of the 312 data segments in each future field of data.
FIG. 13 is a depiction of a quartered-code-rate future-field-description signal that the FIG. 9 modification of DTV transmitter apparatus alternatively uses for supplying DTV receivers with advance information concerning the nature of robust transmissions.
FIG. 14 is a depiction of a future-field-description signal that the FIG. 9 modification of the FIG. 7 or the FIG. 8 DTV transmitter apparatus uses for supplying DTV receivers with advance information concerning the nature of turbo coded robust transmissions.
FIG. 15 is a depiction of the format of half bytes that future-field-description signals per FIG. 14 use for describing each of the 312 data segments in each future field of data.
FIG. 16 is a depiction of the format of the initial one of 313 segments of a field of data, which initial data segment in accordance with an aspect of the invention includes coding that points to a later data segment in that field of data and indicates how that later data segment is coded.
FIGS. 17A, 17B, 17C, 17D and 17E combine to form a schematic diagram of FIG. 17 DTV receiver apparatus embodying an aspect of the invention, which DTV receiver apparatus can receive DTV signals as transmitted by species of the generic DTV transmitter apparatus of FIG. 1, which species are of the sorts shown in FIGS. 3, 4 and 5.
FIG. 18 is a schematic diagram of a modification of the FIG. 17 DTV receiver apparatus.
FIG. 19 is a schematic diagram showing in detail how “smart” data slicing is implemented in preferred decision channel-equalization filtering in the FIG. 17A portion of the FIG. 17 DTV receiver apparatus.
FIG. 20 is a schematic diagram showing in detail a particular construction of circuitry for restoring the original final twenty bytes of data segments that were modified before transmission so that legacy DTV receivers would not mistake them for ordinary 8VSB data segments.
FIG. 21 is a schematic diagram showing in detail a particular construction of a supplementary de-interleaver for signals with code rate one-half that of ordinary 8VSB signal.
FIG. 22 is a schematic diagram showing in detail a particular construction of a supplementary de-interleaver for signals with code rate one-quarter that of ordinary 8VSB signal.
FIG. 23 is a schematic diagram of DTV receiver apparatus embodying an aspect of the invention, which receiver apparatus can receive DTV signals that at least sometimes employ turbo coding of a type transmitted by the DTV transmitter apparatus of FIG. 7.
FIG. 24 is a schematic diagram showing in detail a particular construction of the turbo code segments selector and byte de-interleaver circuitry in the FIG. 23 DTV receiver apparatus.
FIG. 25 is a schematic diagram of DTV receiver apparatus embodying an aspect of the invention, which receiver apparatus can receive DTV signals that at least sometimes employ turbo coding of a type transmitted by the DTV transmitter apparatus of FIG. 8.
FIG. 26 is a schematic diagram showing in detail a particular construction of the turbo code segments selector circuitry in the FIG. 25 DTV receiver apparatus.
FIG. 27 is a schematic diagram of circuitry that can be used in DTV receiver apparatus for retrieving advance information concerning the nature of robust transmissions, as sent by the FIG. 9 modification of DTV transmitter apparatus of the types shown in FIGS. 1 and 3, in FIGS. 1 and 4, in FIGS. 1 and 5, in FIG. 7 and in FIG. 8.
Patent Application
20070217499
