EP0408343A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Encoding device and decoding device suitable for dubbing
Assignee: Canon Inc
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Filing: 1990-07-11
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Granted: —
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Expires: 2010-07-11
Abstract
Abstract For the cases where recording medium recorded at slave side apparatus is reproduced it has been made possible to do identical modification processing to that conducted at master side apparatus, by reproducing, at master side apparatus, the primary information added with parity symbol for error correction from the recording medium on which the primary information is recorded, correcting the symbol error of primary information reproduced at the reproducing means using the reproduced parity symbol, producing the flag which indicates the production of uncorrectable symbol error in one unit of the block of specified information amount and thus outputting the modification information corresponding to the primary information and the flag and forming, at slave side, the parity symbol for correction of error of primary information output at the master side apparatus and recording the primary information added with parity symbol and modification information on the same recording medium. It has also become possible to conduct satisfactory modification processing when the symbol error is produced.
Inventors
- 👤 Yoshiki C/O Canon K.K. Ishii
- 👤 Akihiro Canon K.K. Shikakura
- 👤 Tetsuya Canon K.K. Shimuzu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 21:16
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/02; G11B27/031; G11B27/032; G11B20/00; G11B20/10; G11B20/18; G11B20/1876; G11B5/00; G11B5/86; G11B2220/00; G11B2220/90
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
108 words
An encoding apparatus, comprising: (a) the first input means for inputting the primary information; (b) the second input means for inputting flag information which indicates production of non-production of the past uncorrectable symbol error of the aforesaid primary information for each unit of the specified block of information amount; (c) error correction encoding means for forming a parity symbol to correct the error of the primary information input by the aforesaid first input means and for adding said parity symbol to said primary information; and (d) recording means for recording the primary information with addition of said parity symbol and said flag information on the same recording medium.
Claim 2
Dependent Claim
108 words
An encoding apparatus, comprising: (a) the first input means for inputting the primary information; (b) the second input means for inputting flag information which indicates production of non-production of the past uncorrectable symbol error of the aforesaid primary information for each unit of the specified block of information amount; (c) error correction encoding means for forming a parity symbol to correct the error of the primary information input by the aforesaid first input means and for adding said parity symbol to said primary information; and (d) recording means for recording the primary information with addition of said parity symbol and said flag information on the same recording medium.
Claim 3
Dependent Claim
49 words
An apparatus according to claim 1, wherein said error correction encoding means contains the multiplex circuit which multiplexes said primary information and said flag information and outputs multiplex circuit, forms parity symbol to correct the error of said multiplex information and adds said parity symbol to said multiplex information.
Claim 4
Dependent Claim
45 words
An apparatus according to claim 2, wherein said primary information contains video information and audio information and said multiplex circuit selectively multiplexes the specified amount of said audio information and the specified amount of said flag information on the specified amount of said video information.
Claim 5
Dependent Claim
59 words
An apparatus according to claim 1, wherein said primary information is composed of a group of symbols of the specified bit which do not become the specific symbol pattern and said flag information recorded by said recording means is provided by making said primary information where uncorrectable symbol error has been produced in the past a specific symbol pattern.
Claim 6
Dependent Claim
155 words
Decoding apparatus which reproduces the primary information added with parity symbol for correction of error from the recording medium on which the first flag information indicating said primary information and the production or non-production of uncorrectable past symbol error as one unit of the specified block of information amount is recorded, comprising: (a) reproducing means for reproducing said primary information added with said parity symbol and said flag information from said recording medium; (b) error correcting means for correcting the symbol error of the primary information reproduced by said reproducing means using the parity symbol reproduced by said reproducing means and for producing second flag information indicating the production of uncorrectable symbol error in said block unit; and (c) modifying means for modifying, in said block unit, said primary information having gone through the said error correcting means by said first flag information and said second flag information having been reproduced by said reproducing means.
Claim 7
Dependent Claim
155 words
Decoding apparatus which reproduces the primary information added with parity symbol for correction of error from the recording medium on which the first flag information indicating said primary information and the production or non-production of uncorrectable past symbol error as one unit of the specified block of information amount is recorded, comprising: (a) reproducing means for reproducing said primary information added with said parity symbol and said flag information from said recording medium; (b) error correcting means for correcting the symbol error of the primary information reproduced by said reproducing means using the parity symbol reproduced by said reproducing means and for producing second flag information indicating the production of uncorrectable symbol error in said block unit; and (c) modifying means for modifying, in said block unit, said primary information having gone through the said error correcting means by said first flag information and said second flag information having been reproduced by said reproducing means.
Claim 8
Dependent Claim
48 words
An apparatus according to claim 5, wherein said retouching means contain the logic sum means to take the logic sum of the said first flag information and said second information and decide whether said retouching should be done or not according to the output of said logic sum.
Claim 9
Dependent Claim
71 words
An apparatus according to claim 6, wherein said retouching means decide whether or not said retouching should be done or not for either of the plural number of blocks required for such retouching, as for the block wherein said first flag information indicates the production of the past symbol error and when the second flag information indicates the production of symbol error, makes said decision only responding to the second flag.
Claim 10
Dependent Claim
49 words
An apparatus according to claim 5, wherein the multiplex information which multiplexes said first flag information and said primary information are recorded on said recording medium and said modifying means contain the separation circuit to separate said first flag information from the multiplex information reproduced by said reproducing means.
Claim 11
Dependent Claim
67 words
An apparatus according to claim 8, wherein said primary information is composed of the symbol group of specified bid which does not become a symbol pattern, said first flag information recorded on said recording medium is provided by making said primary information in which the uncorrectable symbol error was produced, a specific symbol pattern and said separation circuit contains the pattern to detect said specific symbol pattern.
Claim 12
Dependent Claim
138 words
A decoding apparatus to reproduce the primary information added with prity symbol for error correction from the recording medium on which said primary information is recorded, comprising: (a) reproducing means for reproducing primary information added with said parity symbol from said recording medium; (b) error correcting means for correcting the symbol error of the primary information reproduced by said reproducing means using the parity symbol reproduced by said reproducing means and for generating a flag which indicates the production of uncorrectable symbol error in one unit of block of specified information amount. (c) modifying means for modifying, in the said block unit, said primary information which has gone through said error correction means using said flag; and (d) output means for outputting modification information corresponding to said primary information having gone through said retouching means and said flag.
Claim 13
Dependent Claim
138 words
A decoding apparatus to reproduce the primary information added with prity symbol for error correction from the recording medium on which said primary information is recorded, comprising: (a) reproducing means for reproducing primary information added with said parity symbol from said recording medium; (b) error correcting means for correcting the symbol error of the primary information reproduced by said reproducing means using the parity symbol reproduced by said reproducing means and for generating a flag which indicates the production of uncorrectable symbol error in one unit of block of specified information amount. (c) modifying means for modifying, in the said block unit, said primary information which has gone through said error correction means using said flag; and (d) output means for outputting modification information corresponding to said primary information having gone through said retouching means and said flag.
Claim 14
Dependent Claim
70 words
An apparatus according to claim 10, wherein flag information indicating production or non-production of uncorrectable past symbol error of said primary information together with said primary information in one unit of block is recorded on said recording medium and said retouching means decides whether or not retouching should be done using said flag information reproduced by said reproducing means and the flag having been generated by said error correction means.
Claim 15
Dependent Claim
22 words
An apparatus according to claim 11, wherein said output means form said modification information according to said flag information and said flag.
Claim 16
Dependent Claim
39 words
An apparatus according to claim 10, wherein said output means have the multiplexing means to multiplex the said primary information having gone through said modifying means and said modification information and outputs the information multiplexed by said multiplexing means.
Claim 17
Dependent Claim
199 words
Dubbing system comprising: (A) reproducing means for reproducing primary information added with the parity symbol for error correction from the recording medium on which said primary information is recorded, comprising: (a) reproducing means for reproducing primary information added with said parity symbol from said recording medium; (b) error correcting means for correcting the symbol error of the primary information reproduced by the said reproducing means using parity symbol reproduced by the said reproducing means and for producing a flag which indicates the production of uncorrectable symbol error in one unit of the block of specified information amount; and (c) output means for outputting modification information corresponding to the said primary information having gone through said error correction means and said flag; and (B) recording device, comprising: (a) input means for inputting said primary information and said retouch information output by said reproducing device; (b) error correction encoding means for forming the parity symbol for correction of primary information input by the said first input means and for adding said parity symbols to said primary information; and (c) recording means for recording the primary information added with the said parity symbol and said modification information on the same recording medium.
Claim 18
Dependent Claim
199 words
Dubbing system comprising: (A) reproducing means for reproducing primary information added with the parity symbol for error correction from the recording medium on which said primary information is recorded, comprising: (a) reproducing means for reproducing primary information added with said parity symbol from said recording medium; (b) error correcting means for correcting the symbol error of the primary information reproduced by the said reproducing means using parity symbol reproduced by the said reproducing means and for producing a flag which indicates the production of uncorrectable symbol error in one unit of the block of specified information amount; and (c) output means for outputting modification information corresponding to the said primary information having gone through said error correction means and said flag; and (B) recording device, comprising: (a) input means for inputting said primary information and said retouch information output by said reproducing device; (b) error correction encoding means for forming the parity symbol for correction of primary information input by the said first input means and for adding said parity symbols to said primary information; and (c) recording means for recording the primary information added with the said parity symbol and said modification information on the same recording medium.
Claim 19
Dependent Claim
45 words
A system according to claim 14, wherein said reproducing device contains the modifying means to modify said primary information having gone through said error correction means in said block unit using said flag and outputs said primary information having gone through the said modifying means.
Claim 20
Dependent Claim
62 words
A system according to claim 14, wherein said output means is provided with the multiplexing means to multiplex said primary information having gone through said correcting means and said modifying means and thus form multiplex information and output said multiplex information, said input means containing the separation means to input said multiplex information and separate said modification information from said multiplex information.
Claim 21
Dependent Claim
57 words
A system according to claim 16, wherein said primary information is composed of specified bits of the symbol group which does not become a specific symbol pattern and said output means makes, as said modification information, said primary information where uncorrectable symbol error had been produced in the past a specific symbol pattern according to said flag.
Claim 22
Dependent Claim
113 words
A system according to claim 14, wherein said recording device further includes the reproduction means to reproduce the primary information added with said parity symbol and said modification information from said recording medium, the second error correcting means for correcting the symbol error of the primary information reproduced by said reproducing means using the parity symbol reproduced by said reproducing means and for producing a second flag which indicates the production of uncorrectable symbol error in said block unit, and modifying means for modifying said primary information having gone through said error correction means in the aforesaid block units using said modification information and said second flag reproduced by the said reproduction means.
Claim 23
Dependent Claim
47 words
A system according to claim 18, wherein said modifying means contain the logic sum means which takes the logic sum of said modification information and said second flag and decides whether or not the modification should be done according to the output of said logic sum means.
Claim 24
Dependent Claim
32 words
Use in encoding or decoding apparatus of input means or error correcting means responsive to flag information that indicates for a primary information stream an uncorrectable symbol error in a region thereof.
Claim 25
Dependent Claim
32 words
Use in encoding or decoding apparatus of input means or error correcting means responsive to flag information that indicates for a primary information stream an uncorrectable symbol error in a region thereof.
References Cited (Backward Citations)
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