Apparatus having defective sector compensation coupled with analog information mode and digital information mode recording/reproducing capability

• US 5,130,969 A
• Filed: 01/17/1990
• Issued: 07/14/1992
• Est. Priority Date: 02/15/1989
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Sako, Yoichiro
• Primary Examiner(s): Richardson, Robert L.
• Application Number:
  US07/466,028
• Time in Patent Office: 909 Days
• Field of Search: 360/53, 360/32, 360/48, 369/53-59
• US Class Current: 369/53.17
• CPC Class Codes: G11B 20/18 Error detection or correction; Testing , e.g. of drop-outs
• CPC Class Codes: G11B 20/1883 Methods for assignment of alternate areas for defective areas
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers

Abstract

Input data is sequentially and consecutively recorded in a series of unit recording areas (sectors) on the record medium, and when a defective area is detected, corresponding data is stored in a memory until either the recording of said input data is finished or the capacity of the memory is exceeded, and then the data stored in the memory is recorded in an alternate area of the record medium. Further, an identifying information indicative of kinds of input data is recorded in a particular recording area of the record medium, wherein upon reproducing, reproduction processing can be automatically switched to read the alternate area in response to the identifying information and detection of a defective area.

Claims

1. A data recording apparatus for sequentially recording input consecutive data in a predetermined unit recording area of a record medium, comprising:

(a) detecting means for detecting a defective recording area in the record medium;

(b) a memory for storing, in response to an output of the detecting means, input data assigned to a defective recording area, wherein data stored in the memory is recorded in an alternate recording area of the record medium at the completion of the recording of the input data; and

(c) storage capacity watching means for watching the data amount stored in the memory, wherein when the data amount reaches a predetermined value, data stored in the memory is recorded in a first particular recording area of the record medium.

2. The data recording apparatus according to claim 1, wherein data representative of a corresponding relationship between the defective recording area and the first particular recording area is recorded in a second particular recording area of the record medium.

3. A data recording apparatus for sequentially recording input consecutive data in a predetermined unit recording area of a record medium, comprising:

(a) detecting means for detecting a defective recording area in the record medium;

(b) a memory for storing, in response to an output of the detecting means, input data assigned to a defective sector, wherein data stored in the memory is recorded in an alternate recording area of the record medium at the completion of the recording of the input data; and

(c) storage capacity watching means for watching the data amount stored in the memory, wherein when the data amount reaches a predetermined value, writing in the memory is inhibited.

4. A data recording apparatus for sequentially recording input data in a predetermined unit recording area of a record medium, comprising:

(1) data identifying means for determining whether the input data is digitized, analog data or intermittent, digital data;

(2) detecting means for detecting a defective recording area in the record medium when intermittent, digital data is detected by the data identifying means and generating a corresponding output signal; and

(3) a memory for storing, in response to the output signal of the detecting means, input data assigned to a defective recording area wherein data stored in the memory is recorded in an alternate recording area of the record medium at the completion of the recording of the input data.

5. The data recording apparatus according to claim 4, wherein an identifying signal for determining whether the recorded data is digitized, analog data or intermittent, digital data is recorded in a particular area of the record medium in response to an output of the data identifying means.

6. A data reproducing apparatus for reproducing data from a record medium in which the data is recorded in a unit recording area and an identifying information, indicative of whether or not the recorded data includes intermittent, digital data, is recorded in a particular area, comprising:

identifying information detecting means for detecting the identifying information wherein it is determined, in response to the detected identifying information, whether the recorded data includes intermittent, digital data; and

detecting means, controlled by the identifying information detecting means, for detecting a defective area in the record medium, and reproducing recorded intermittent, digital data corresponding to the defective area and recorded in an alternate recording area of the record medium.