PCM Signal transmitting system with error detecting and correcting capability
First Claim
1. A method of processing sequentially transferred digital information words, said method comprising the steps of:
- forming a block of a plurality of said information words;
forming a parity error correcting word corresponding to said block and adding said parity error correcting word to said block;
forming a b-adjacent error correcting word corresponding to said block and adding said b-adjacent error correcting word to said block;
time-interleaving each of said information words and said primary and b-adjacent error correcting words in said block into time-interleaved blocks distributed over a predetermined time;
adding an error detecting code to at least one of said time-interleaved blocks; and
transmitting said at least one time-interleaved block and said error detecting code associated therewith.
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Abstract
A PCM (pulse code modulation) signal transmission system processes sequentially transferred digital information words including two error correcting words consisting of a parity code word and a b-adjacent code word and adds them to the digital information words, time-interleaves each of the information words and its error correcting words in the block into time-interleave blocks distributed over a predetermined time, adds an error detecting code to at least one of the time-interleaved blocks, and transmits at least one time-interleaved block and error correcting code associated therewith. Method and apparatus for de-interleaving and error correction based on the three appended codes are included.
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Citations
6 Claims
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1. A method of processing sequentially transferred digital information words, said method comprising the steps of:
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forming a block of a plurality of said information words; forming a parity error correcting word corresponding to said block and adding said parity error correcting word to said block; forming a b-adjacent error correcting word corresponding to said block and adding said b-adjacent error correcting word to said block; time-interleaving each of said information words and said primary and b-adjacent error correcting words in said block into time-interleaved blocks distributed over a predetermined time; adding an error detecting code to at least one of said time-interleaved blocks; and transmitting said at least one time-interleaved block and said error detecting code associated therewith. - View Dependent Claims (2)
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3. An apparatus for processing digital information words comprising:
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means for forming a block of a plurality of said information words; means for forming and adding a parity error correcting word and a b-adjacent code error correcting word to said block; means for time-interleaving each of said information words and said error correcting words in said block into time-interleaved blocks distributed over a predetermined time; means for adding an error detecting code to at least one of said time-interleaved blocks; and means for transmitting said at least one time-interleaved block and said error detecting code associated therewith. - View Dependent Claims (4)
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5. An attachment for permitting a video tape recorder to record and reproduce at least one high quality audio signal on a video tape, comprising:
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means for converting said audio signal to a plurality of multi-bit digital words, each of said digital words containing a representation of a characteristic of said audio signal at a discrete point in time; means for defining a block consisting of a fixed plurality of said digital words; means for producing a first error correcting word for said block and for adding said first error correcting word to said block; means for producing a second error correcting word for said block and for adding said second error correcting word to said block; said first and second error correcting words having a characteristic which permits correction of errors in first and second digital words in said block if said first and second digital words which contain errors are identified and which permits correction of errors in a single digital word in said block if identification of digital words containing errors is not possible; means for time-interleaving each of said digital words and said first and second error correcting words from said block each into different time interleaved blocks; means for producing an error detecting word for each time-interleaved block and for adding each said error detecting word to its respective time interleaved block; and means for transmitting said time interleaved block including said error detecting code as a serial signal including at least horizontal synchronizing pulses to a video tape recorder for recording therein. - View Dependent Claims (6)
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Specification