JPS6462039A - Digital mute circuit - Google Patents

Digital mute circuit

Info

Publication number
JPS6462039A
JPS6462039A JP21783187A JP21783187A JPS6462039A JP S6462039 A JPS6462039 A JP S6462039A JP 21783187 A JP21783187 A JP 21783187A JP 21783187 A JP21783187 A JP 21783187A JP S6462039 A JPS6462039 A JP S6462039A
Authority
JP
Japan
Prior art keywords
signal
section
signal processing
digital
audio
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.)
Pending
Application number
JP21783187A
Other languages
Japanese (ja)
Inventor
Kenji Hanada
Yuzo Nishimura
Koichi Ihara
Tadashi Tanase
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP21783187A priority Critical patent/JPS6462039A/en
Publication of JPS6462039A publication Critical patent/JPS6462039A/en
Pending legal-status Critical Current

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Noise Elimination (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

PURPOSE:To prevent noise from being generated in an audio circuit by shutting off a signal other than an audio data from being transferred to the audio circuit. CONSTITUTION:A digital signal recorded on a CD 1 is read by a pickup section 2, sent to a CD signal processing section 3, where signal processing is applied according to the CD format and the signal is fed to a CD-ROM signal processing section 7, where the signal processing is attained by the CD-ROM format. On the other hand, the signal is fed to a D/A converter section 6 through a gate circuit 5 from the CD signal processing section 3 by the audio output. In such a case, the output signal of the CD signal processing section 3 is gated by the gate circuit 5 by using a mute signal MUTE from a system controller section 4. When the digital signal recorded on the CD 1 is a digital data signal, the signal is not sent to the D/A converter section 6. Thus, the noise due to data transmission call be prevented.
JP21783187A 1987-09-02 1987-09-02 Digital mute circuit Pending JPS6462039A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21783187A JPS6462039A (en) 1987-09-02 1987-09-02 Digital mute circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21783187A JPS6462039A (en) 1987-09-02 1987-09-02 Digital mute circuit

Publications (1)

Publication Number Publication Date
JPS6462039A true JPS6462039A (en) 1989-03-08

Family

ID=16710433

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21783187A Pending JPS6462039A (en) 1987-09-02 1987-09-02 Digital mute circuit

Country Status (1)

Country Link
JP (1) JPS6462039A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6488964A (en) * 1987-09-30 1989-04-03 Toshiba Corp Disk player device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5592068A (en) * 1978-12-29 1980-07-12 Fujitsu Ltd Voice data composite communication system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5592068A (en) * 1978-12-29 1980-07-12 Fujitsu Ltd Voice data composite communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6488964A (en) * 1987-09-30 1989-04-03 Toshiba Corp Disk player device

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