Disk player which avoids sound failure resulted from retry of data reading

• US 5,608,698 A
• Filed: 11/09/1995
• Issued: 03/04/1997
• Est. Priority Date: 11/11/1994
• Status: Expired due to Fees

• Current Assignee: Pioneer Electronics (USA) Incorporated (Pioneer Corporation), Lucas Digital Ltd. (The Walt Disney Company)
• Original Assignee: Pioneer Electronics (USA) Incorporated (Pioneer Corporation)
• Inventors: Miura, Isamu, Yamanoi, Katsuaki, Miyagawa, Tomoko
• Primary Examiner(s): Tran, Thang V.
• Application Number:
  US08/556,051
• Time in Patent Office: 481 Days
• Field of Search: 369/47, 369/48, 369/53, 369/54, 369/58, 369/60, 369/32, 369/84, 369/49
• US Class Current: 369/53.35
• CPC Class Codes: G11B 19/00 Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
• CPC Class Codes: G11B 19/04 Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence

Abstract

A disk player reads data read from a disk after temporary storage in a memory and outputs the read data and is capable of preventing the memory from becoming empty by a retry operation for reading data, thereby avoiding a sound failure. When an address whose data is not correctly readable is present on a disk, the address information of that address is stored, and when the same disk is played again, the data reading operation for the new address is performed before the amount of remaining data in the memory becomes too small at the time the next reading address is address whose data is unreadable based on the address information. When at least the same disk is played again, therefore, the memory may not become empty, thus preventing a sound failure from occurring.

Claims

1. A disk player comprising:

reading means for reading data, recorded on a disk, for each predetermined block affixed with address information;

a memory for storing data read by said reading means;

memory control means for writing data into said memory when said data is correctly read, block by block, from said disk by said reading means, and, upon incorrect reading of data, inhibiting writing of said data into said memory and reading data from said memory at a speed slower than a writing speed;

means for detecting an amount of data still remaining in said memory after being written therein;

read control means for controlling said reading means in such a way as to read again data which has not been read correctly when said amount of remaining data is equal to or greater than a first predetermined value, and controlling said reading means in such a way as to read data at a new address when said amount of remaining data becomes smaller than said first predetermined value; and

means for determining if it is a first playback for said disk,

said read control-means including,

means for storing, as an error data address, address information for data which has not been read correctly before said amount of remaining data becomes smaller than said first predetermined value when it is said first playback, and

means for controlling said reading means in such a way as to read again data which has not been read correctly in a different playback from said first playback, when an address whose data has not been read correctly is equal to said error data address stored at a time of said first playback and said amount of remaining data is equal to or greater than a second predetermined value larger than said first predetermined value, and controlling said reading means in such a way as to read data at a new address when said amount of remaining data becomes smaller than said second predetermined value.

2. The disk player according to claim 1, wherein said read control means stores an address of data which follows data that has not been read correctly and which has been read correctly, as a correct data address in said first playback, and controls said reading means in such a way as to read data at said correct data address as data at said new address in a playback other than said first playback.

3. A disk player comprising:

reading means for reading data, recorded on a disk, for each predetermined block affixed with address information;

a memory for storing data read by said reading means;

memory control means for writing data into said memory when said data is correctly read, block by block, from said disk by said reading means, and, upon incorrect reading of data, inhibiting writing of said data into said memory, and reading data from said memory at a speed slower than a writing speed;

means for detecting an amount of data still remaining in said memory after being written therein;

read control means for controlling said reading means in such a way as to read again data which has not been read correctly when said amount of remaining data is equal to or greater than a predetermined value, and controlling said reading means in such a way as to read data at a new address when said amount of remaining data becomes smaller than said predetermined value; and

means for determining if it is a first playback for said disk,

said read control means including,

means for storing address information for data which has not been read correctly before said amount of remaining data becomes smaller than said predetermined value when it is said first playback,

means for determining if next data is correctly readable based on said address information in a different playback from said first playback, and

means for controlling said reading means in such a way as to read data at a new address without reading said next data when said next data has not been determined as having not been read correctly.