Patent EP0554858A2 successfully refreshed from Google Patents.
EP0554858A2
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EP
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Disc reproducing apparatus and disc recording apparatus
Assignee: Sony Corp
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Filing: 1993-02-03
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Granted: —
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Expires: 2013-02-03
Abstract
Abstract A disc reproducing apparatus for reproducing voice data recorded on an optical disc (1) by successive predetermined amounts and recording the reproduced data temporarily in a RAM (6) for subsequent continuous reproduction, and a disc recording apparatus for reading out the voice data written in RAM (6) by successive predetermined amounts for recording on the optical disc. A RAM controlling circuit (8) is provided in the disc reproducing apparatus or the disc recording apparatus for dividing the storage region of RAM (6) at least into a voice data recording region for recording the voice data and an error flag recording region for storing error flags, calculating the residual vacant space of the voice data recording region from the voice data write addresses for writing the voice data recording region and the voice data read address for reading the vice data from the voice at a recording region and controlling the voice data write address while controlling the error flag write address for recording error flags in the error flag recording region in accordance with the voice data write address. Since there is no necessity of providing plural private RAMs for the voice data recording region and for the error flag storage region to render it possible to write and read plural types of data in one and the same RAM (6).
Inventors
- 👤 Kosuke C/O Sony Corporation Nakamura
- 👤 Yasuaki C/O Sony Corporation Maeda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 12:36
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/02; G11B11/00; G11B11/10; G11B11/105; G11B11/10595; G11B20/00; G11B20/00007; G11B20/10; G11B20/10527; G11B20/18; G11B20/1806; G11B27/00; G11B27/02; G11B27/031; G11B27/034; G11B27/10; G11B27/102; G11B27/105; G11B27/19; G11B27/28; G11B27/32; G11B27/327; G11B27/329; G11B2220/00; G11B2220/20; G11B2220/21; G11B2220/211; G11B2220/215; G11B2220/218; G11B2220/25; G11B2220/2525; G11B2220/2537; G11B2220/2545
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
158 words
A disc reproducing apparatus comprising reproducing means (10, 12) for reproducing recording data recorded on an optical disc (1), and memory means (6) for transiently storing playback data produced by said reproducing means, said playback data stored in said memory mens being read out at a constant rate and supplied at an output, characterized in that it further comprises memory controlling means (8) for dividing a storage region in said memory means (6) into at least two sub-areas, that is a playback data storage region for writing and reading said playback data and an error flag storage region for writing and reading an error flag indicating an error in said playback data, said memory controlling means (8) causing said error flag to be written in an address location of the error flag storage region associated in a one-for-one relation with the write address of the playback data in said playback data storage region by way of address control.
Claim 2
Dependent Claim
50 words
The disc reproducing apparatus as claimed in claim 1 wherein the recording data recorded on said optical disc (1) is the compressed voice data and wherein data expansion means is provided for expanding the compressed voice data read out from said memory means (6) and outputting the expanded voice data.
Claim 3
Dependent Claim
94 words
The disc reproducing apparatus as claimed in claim 1 wherein the memory controlling means (8) comprises a voice data write address generator (20) for generating a write address for playback voice data into said playback data storage region, a voice data readout address generator (21) for generating a read address for playback voice data written in said playback data recording region, and an error flag address generator (24) for generating the write address and the read address for said error flag based on said voice data write address and said voice data readout address.
Claim 4
Dependent Claim
47 words
The disc reproducing apparatus as claimed in claim 1 wherein, when forming a 1-bit error flag for 1 byte of the playback data, the storage capacity of said error flag storage region is set to one-eighth or more of the storage capacity of said playback storage region.
Claim 5
Dependent Claim
69 words
The disc reproducing apparatus as claimed in claim 1 wherein said memory controlling means (8) causes the error flag associated with said playback data to be written in an address CA CA = NL + 1/8(MA - NU) for the playback data write address MA, where NU is the start address in the playback data storage region and NL is the start address in said error flag storage region.
Claim 6
Dependent Claim
93 words
The disc reproducing apparatus as claimed in claim 1 wherein said memory controlling means (8) calculates the size of a vacant space of the playback data storage region from a voice data write address value and a voice data readout address value and causes the writing of playback data in said playback data storage region to be terminated when the size of said vacant space is approximately nil, while causing the writing of the playback data in said playback data storage region to be started when said vacant space exceeds a predetermined value.
Claim 7
Dependent Claim
44 words
The disc reproducing apparatus as claimed in claim 1 wherein said memory means (6) comprises an auxiliary data storage region for writing and readout of the auxiliary data concerning said recording data besides said playback data storage region and said error flag storage region.
Claim 8
Dependent Claim
141 words
A disc reproducing apparatus comprising reproducing means (11, 12) for reproducing recording data recorded on an optical disc (1) , and memory means (6) for transiently storing playback data produced by said reproducing means (11, 12), said playback data stored in said memory means (6) being read out at a constant rate and supplied at an output, characterized in that it further comprises memory controlling means (8) for dividing a storage region in said memory means (6) into at least two sub-areas, that is a playback data storage region for writing and reading said playback data and an auxiliary data storage region for writing and reading auxiliary data concerning said recording data, said memory controlling means (8) controlling playback data writing and readout in said playback data storage region and auxiliary data recording and readout in said auxiliary data recording region.
Claim 9
Dependent Claim
79 words
The disc reproducing apparatus as claimed in claim 1 wherein said auxiliary data storage region is further divided into a TOC data storage region and a sub-data storage region, and wherein said memory controlling means (8) control playback data writing and readout in said playback data storage region, auxiliary writing and readout in said auxiliary data storage region, TOC data writing and readout in said TOC data storage region and sub-data writing and readout in said sub-data storage region.
Claim 10
Dependent Claim
110 words
A disc recording apparatus comprising memory means (6) for transiently storing input data at a constant rate, the data stored in said memory means (6) being read out for storage in a disc (1), comprising memory controlling means (8) for dividing a storage region of said memory means into a playback data storage region for writing and readout of said playback data and an auxiliary data storage sub-area for writing and readout of auxiliary data concerning said recording data, said memory controlling means (8) controlling writing and readout of playback data in said playback data storage means and writing and readout of auxiliary data in said auxiliary data storage region.
Claim 11
Dependent Claim
76 words
The disc recording apparatus as claimed in claim 10 wherein said auxiliary data storage region is subdivided into a TOC data storage region and a sub-data storage region, said memory controlling means (8) controlling playback data writing and readout in said playback data storage region, auxiliary writing and readout in said auxiliary data storage region, TOC data writing and readout in said TOC data storage region and sub-data writing and readout in said sub-data storage region.
References Cited (Backward Citations)
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