Patent EP0235782A2 successfully refreshed from Google Patents.
EP0235782A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for reproducing a digital signal
Assignee: Sony Corp
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Filing: 1987-03-02
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Granted: —
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Expires: 2007-03-02
Abstract
Abstract The invention relates to a digital signal reproducing apparatus to which continuous blocks of input data are supplied, each block consisting of a PCM signal which was error correction coded and additional codes of the PCM signal which were subjected to error detection or error correction coding processes. The error pointers are set independently of the result of the error correction of the PCM signal on the basis of the decoding state of the decoder for decoding the additional codes using the error detection code or error correction code.
Inventors
- 👤 Tadashi Fukami
- 👤 Shinya Ozaki
- 👤 Kentaro Odaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 19:12
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/1808; G11B15/1875; G11B20/00; G11B20/10; G11B20/10527; G11B20/18; G11B20/1806; G11B20/1813; G11B27/00; G11B27/005; G11B2220/00; G11B2220/90; G11B2220/91; G11B2220/913
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
151 words
An apparatus for reproducing a digital signal in which continous blocks of input data are supplied to said apparatus and each of said blocks consists of a PCM signal which was error correction coded and additional codes of said PCM signal which were subjected to an error correction or detection coding process, said apparatus comprising: means (37;57) for error correcting each of said PCM signal blocks using the error correction code and outputting error corrected data; decoding means (32;52) for decoding the additional codes using the error detection code or the error correction code; interpolating means (38,49;58,69) which is supplied with output data of said error correcting means; and deciding means (47...;67,68...) which operates independently of the result of the correction by said error correcting means (37;52) for setting an error pointer to data which is supplied to said interpolating circuit in accordance with the decoding state of said decoding means.
Claim 2
Independent Claim
151 words
An apparatus for reproducing a digital signal in which continous blocks of input data are supplied to said apparatus and each of said blocks consists of a PCM signal which was error correction coded and additional codes of said PCM signal which were subjected to an error correction or detection coding process, said apparatus comprising: means (37;57) for error correcting each of said PCM signal blocks using the error correction code and outputting error corrected data; decoding means (32;52) for decoding the additional codes using the error detection code or the error correction code; interpolating means (38,49;58,69) which is supplied with output data of said error correcting means; and deciding means (47...;67,68...) which operates independently of the result of the correction by said error correcting means (37;52) for setting an error pointer to data which is supplied to said interpolating circuit in accordance with the decoding state of said decoding means.
Claim 3
Dependent Claim
121 words
A digital signal reproducing apparatus according to claim 1, wherein said PCM signal is derived from signals recorded in tracks formed on a tape-shaped recording medium (3), and said apparatus further comprises first and second heads (2A,2B) for alternately reproducing the signal recorded on said recording medium (3), said deciding means includes comparing means (47) for comparing the decoding state of said decoding means with respect to the signal reproduced by said first head with the decoding state of the decoding means with regard to the signal reproduced by said second head, and said deciding means sets error pointers to the data reproduced by one of said first and second heads on the basis of the output of said comparing means.
Claim 4
Dependent Claim
18 words
A digital signal reproducing apparatus according to claim 2, wherein said first and second heads are rotary heads.
Claim 5
Dependent Claim
84 words
A digital signal reproducing apparatus according to claim 3, further comprising detecting means (45;64) for detecting the number of errors during the scanning operations of said first and second heads and wherein said deciding means has counting means (46;65) for counting the number of errors which are detected during one scanning operation of each of the first and second heads, and said comparing means (47;68) compares the count values which are obtained from said counting means with respect to the first and second heads.
Claim 6
Dependent Claim
62 words
A digital signal reproducing apparatus according to claim 2, further having drive means (4A,4B) for selectively moving said recording medium (3) upon playback at the same or a different speed with respect to the recording speed, and wherein said deciding means is made operative when said drive means moves the recording medium at a playback speed different from the speed upon recording.
Claim 7
Dependent Claim
76 words
A digital signal reproducing apparatus according to claim 3, wherein a frame address which increases with each rotation of said head is added to each block of said input data, and said apparatus further comprises detecting means (62) for detecting the frame addresses and frame address discriminating means (63) for comparing said detected frame addresses for the blocks of data reproduced during the period of time when the scanning operation by each head is being executed.
Claim 8
Dependent Claim
70 words
A digital signal reproducing apparatus according to claim 6, wherein the error correcting means (37;57) performs an erasing correction and wherein the erasing correction is inhibited in said error correcting means (37;57) on the basis of the output of said frame address discriminating'means (63) when a data block having a frame address different from the other frame addresses which are detected during one scanning operation of the head is reproduced.
References Cited (Backward Citations)
No citation records indexed.
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