JPS56107315A - Muting device - Google Patents

Muting device

Info

Publication number
JPS56107315A
JPS56107315A JP920580A JP920580A JPS56107315A JP S56107315 A JPS56107315 A JP S56107315A JP 920580 A JP920580 A JP 920580A JP 920580 A JP920580 A JP 920580A JP S56107315 A JPS56107315 A JP S56107315A
Authority
JP
Japan
Prior art keywords
error
frame
count
circuit
nonerror
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
JP920580A
Other languages
Japanese (ja)
Other versions
JPS6356629B2 (en
Inventor
Yoji Sawada
Minoru Hama
Yoshinobu Nishikawa
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP920580A priority Critical patent/JPS56107315A/en
Publication of JPS56107315A publication Critical patent/JPS56107315A/en
Publication of JPS6356629B2 publication Critical patent/JPS6356629B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1806—Pulse code modulation systems for audio signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To prevent the production of shock sound and to protect the amplifier and speaker, by providing the count circuit which counts the number of error frames ever given frame, and constituting that muting can be operated. CONSTITUTION:A signal indicating whether an error is present or not in the frame every frame from the code error detection circuit 17, is output. The error signal Se is input to the error count circuit 26, and the nonerror signal Se is input to the nonerror count circuit 27. A clear signal CL is input every prescribed frame number M to the count circuits 26, 27, and the number of error frames in the prescribed frame number M and the number of nonerror frames are counted at the count circuits 26 and 27. When the error frame reaches a prescribed value, the output Q1 of the error count circuit 26 is at high level to reset the muting circuit 28, and Q3 output is at low level, allowing to make muting state. With the constitution like this, the production of shock sound is prevented and the amplifier can be protected.
JP920580A 1980-01-28 1980-01-28 Muting device Granted JPS56107315A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP920580A JPS56107315A (en) 1980-01-28 1980-01-28 Muting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP920580A JPS56107315A (en) 1980-01-28 1980-01-28 Muting device

Publications (2)

Publication Number Publication Date
JPS56107315A true JPS56107315A (en) 1981-08-26
JPS6356629B2 JPS6356629B2 (en) 1988-11-08

Family

ID=11713967

Family Applications (1)

Application Number Title Priority Date Filing Date
JP920580A Granted JPS56107315A (en) 1980-01-28 1980-01-28 Muting device

Country Status (1)

Country Link
JP (1) JPS56107315A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57133508A (en) * 1981-02-09 1982-08-18 Mitsubishi Electric Corp Muting controller
JPS60250726A (en) * 1984-05-26 1985-12-11 Sony Corp Receiver
JPS6369073A (en) * 1986-09-10 1988-03-29 Mitsubishi Electric Corp Muting circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421210A (en) * 1977-07-19 1979-02-17 Mitsubishi Electric Corp Correction unit for pulse code modulation signal
JPS5446018A (en) * 1977-09-20 1979-04-11 Sony Corp Pcm signal demodulator
JPS55157114A (en) * 1979-05-23 1980-12-06 Matsushita Electric Ind Co Ltd Muting circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421210A (en) * 1977-07-19 1979-02-17 Mitsubishi Electric Corp Correction unit for pulse code modulation signal
JPS5446018A (en) * 1977-09-20 1979-04-11 Sony Corp Pcm signal demodulator
JPS55157114A (en) * 1979-05-23 1980-12-06 Matsushita Electric Ind Co Ltd Muting circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57133508A (en) * 1981-02-09 1982-08-18 Mitsubishi Electric Corp Muting controller
JPH0157426B2 (en) * 1981-02-09 1989-12-05 Mitsubishi Electric Corp
JPS60250726A (en) * 1984-05-26 1985-12-11 Sony Corp Receiver
JPS6369073A (en) * 1986-09-10 1988-03-29 Mitsubishi Electric Corp Muting circuit

Also Published As

Publication number Publication date
JPS6356629B2 (en) 1988-11-08

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