EP0073519A2
Expired / Lapsed
EP
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Optical disc player
Assignee: Sony Corp
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Filing: 1982-08-31
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Granted: —
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Expires: 2002-08-31
Abstract
Abstract An optical disc player comprises a rotating member for rotating the optical disc (1), an optical pickup member (4) for reproducing a digital audio signal including an error correcting code like a Reed-Solomon Code from the disc (1), an error correcting decoder (10) for decoding the error correcting code so as to produce a corrected or interpolated digital audio signal and condition flag data indicating the correction of the digital audio signal, and a display (16) for indicating the condition flag data as stain condition of the disc (1).
Inventors
- 👤 Katsuaki Tsurushima
- 👤 Rsuneo Furuya
- 👤 Tadashi C/O Bukko Danchi Fukami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 09:25
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/004; G11B7/005; G11B20/00; G11B20/10; G11B20/14; G11B20/18; G11B20/1876; G11B27/00; G11B27/10; G11B27/34; G11B27/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
An optical disc player comprising: - a driving means for rotating an optical disc (1) carrying recorded information data thereon, - an optical pickup means (4) for obtaining said information data as optical information from said optical disc, and - converting means for converting said optical information to an electric signal, characterized by - a detecting means (8 to 14) for detecting the condition of said electric signal and producing a detecting signal, and - an indicating means (16) for indicating the condition of said electric signal as condition of stain or dust on the disc.
Claim 2
Dependent Claim
96 words
An optical disc player comprising: - a driving means for rotating an optical disc (1) carrying recorded information data thereon, - an optical pickup means (4) for obtaining said information data as optical information from said optical disc, and - converting means for converting said optical information to an electric signal, characterized by - a detecting means (8 to 14) for detecting the condition of said electric signal and producing a detecting signal, and - an indicating means (16) for indicating the condition of said electric signal as condition of stain or dust on the disc.
Claim 3
Dependent Claim
32 words
An optical disc player according to claim 1, wherein said detecting means detects the condition of errors or corrections of said digital data electric signal including an error detecting and/or correcting code.
Claim 4
Dependent Claim
47 words
An optical disc player according to claim 2, wherein said error detecting or correcting code is capable to detect N words error and to correct M words error (M<N) and said detecting means detects condition of "correction impossible" and to produce a detecting signal indicating this condition.
Claim 5
Dependent Claim
64 words
An optical disc player according to claim 3, wherein said error correcting code is such kind of code that two words error is correctable and said detecting means detects four types of conditions of correction which are "no error", "one word corrected", "two words corrected" and "correction impossible" and to produce corresponding detecting signals to be supplied to four display devices (16A to 16D)
Claim 6
Dependent Claim
36 words
An optical disc player according to claim 2, wherein said detecting means produces a pointer bit to be supplied to the display (16) when the existance of an error condition is detected in said digital data.
References Cited (Backward Citations)
No citation records indexed.
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