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CA2049767A1 - Disc-shaped recording medium - Google Patents

Disc-shaped recording medium

Info

Publication number
CA2049767A1
CA2049767A1 CA2049767A CA2049767A CA2049767A1 CA 2049767 A1 CA2049767 A1 CA 2049767A1 CA 2049767 A CA2049767 A CA 2049767A CA 2049767 A CA2049767 A CA 2049767A CA 2049767 A1 CA2049767 A1 CA 2049767A1
Authority
CA
Canada
Prior art keywords
disc
recording medium
shaped recording
range
inner diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2049767A
Other languages
French (fr)
Other versions
CA2049767C (en
Inventor
Katsuaki Tsurushima
Tadao Yoshida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2049767A1 publication Critical patent/CA2049767A1/en
Application granted granted Critical
Publication of CA2049767C publication Critical patent/CA2049767C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

A disc-shaped recording medium for storing compressed audio data which have been recorded thereon by an optical recording apparatus. The inner diameter of a data recording region of the disc-shaped recording medium is in the range from 28 mm to 50 mm. The outer diameter of the data recording region is in the range from 58 mm to 62 mm for an inner diameter of 28 mm, and is in the range from 71 mm to 73 mm for an inner diameter of 50 mm. The disc-shaped recording medium may be used with a small-sized portable disc recording and reproducing apparatus, and can record compressed audio data for playback with a playback time substantially as long as that of a standard compact disc having 12 cm diameter.
CA002049767A 1990-08-24 1991-08-23 Disc-shaped recording medium Expired - Fee Related CA2049767C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP222823/90 1990-08-24
JP22282390 1990-08-24
JP3208871A JPH056572A (en) 1990-08-24 1991-07-26 Disk type recording medium
JP208871/91 1991-07-26

Publications (2)

Publication Number Publication Date
CA2049767A1 true CA2049767A1 (en) 1992-02-25
CA2049767C CA2049767C (en) 2000-10-31

Family

ID=26517094

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002049767A Expired - Fee Related CA2049767C (en) 1990-08-24 1991-08-23 Disc-shaped recording medium

Country Status (2)

Country Link
JP (1) JPH056572A (en)
CA (1) CA2049767C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0674394B1 (en) 1993-10-08 2001-05-16 Sony Corporation Digital signal processor, digital signal processing method and data recording medium
JP2001006210A (en) 1999-06-22 2001-01-12 Sony Corp Optical recording medium and disk cartridge
KR100782804B1 (en) * 2001-07-05 2007-12-06 삼성전자주식회사 A high density disk
KR100788650B1 (en) * 2001-10-13 2007-12-26 삼성전자주식회사 High density disk
CN1224028C (en) * 2003-06-23 2005-10-19 清华大学 Small-size compact disc for data memory and access

Also Published As

Publication number Publication date
CA2049767C (en) 2000-10-31
JPH056572A (en) 1993-01-14

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed