JPS5639646A - Processor for demodulation output of stereophonic signal - Google Patents

Processor for demodulation output of stereophonic signal

Info

Publication number
JPS5639646A
JPS5639646A JP11493279A JP11493279A JPS5639646A JP S5639646 A JPS5639646 A JP S5639646A JP 11493279 A JP11493279 A JP 11493279A JP 11493279 A JP11493279 A JP 11493279A JP S5639646 A JPS5639646 A JP S5639646A
Authority
JP
Japan
Prior art keywords
high frequency
separation
left channel
parts
outputs
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
JP11493279A
Other languages
Japanese (ja)
Other versions
JPS619780B2 (en
Inventor
Koji Ishida
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP11493279A priority Critical patent/JPS5639646A/en
Publication of JPS5639646A publication Critical patent/JPS5639646A/en
Publication of JPS619780B2 publication Critical patent/JPS619780B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
    • H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
    • H04H40/63—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving for separation improvements or adjustments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/1646—Circuits adapted for the reception of stereophonic signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
    • H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
    • H04H40/72—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving for noise suppression

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

PURPOSE:To improve the deterioration of high frequency separation resulting from the addition of a high blend circuit by controlling the 1st and 2nd demodulation levels by control signals that correspond to levels of high frequency parts of the 1st and 2nd channel demodulated signals. CONSTITUTION:A composite signal from the FM detector is demodulated by MPX demodulator 1 into right and left channel signals before being outputted. Parts of those outputs are supplied to envelope detectors 10 and 11 via HPFs 8 and 9 to obtain envelope detection outputs of high frequency parts of the right and left channel signals. In the above-mentioned constitution, when switch SW1 of the high blend circuit is closed, mutually antiphase high frequency noise components included in the right and left channel signals are removed by capacitor C by being blended. At the same time, the separation of the high frequency part deteriorates, but gains of VCAs 6 and 7 are controlled by the outputs of detectors 10 and 11, so that the deterioration of separation can be improved.
JP11493279A 1979-09-07 1979-09-07 Processor for demodulation output of stereophonic signal Granted JPS5639646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11493279A JPS5639646A (en) 1979-09-07 1979-09-07 Processor for demodulation output of stereophonic signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11493279A JPS5639646A (en) 1979-09-07 1979-09-07 Processor for demodulation output of stereophonic signal

Publications (2)

Publication Number Publication Date
JPS5639646A true JPS5639646A (en) 1981-04-15
JPS619780B2 JPS619780B2 (en) 1986-03-26

Family

ID=14650225

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11493279A Granted JPS5639646A (en) 1979-09-07 1979-09-07 Processor for demodulation output of stereophonic signal

Country Status (1)

Country Link
JP (1) JPS5639646A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0307887A2 (en) * 1987-09-18 1989-03-22 Sanyo Electric Co., Ltd. FM stereo demodulator
KR100501930B1 (en) * 2002-11-29 2005-07-18 삼성전자주식회사 Audio decoding method recovering high frequency with small computation and apparatus thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0307887A2 (en) * 1987-09-18 1989-03-22 Sanyo Electric Co., Ltd. FM stereo demodulator
KR100501930B1 (en) * 2002-11-29 2005-07-18 삼성전자주식회사 Audio decoding method recovering high frequency with small computation and apparatus thereof
US7444289B2 (en) 2002-11-29 2008-10-28 Samsung Electronics Co., Ltd. Audio decoding method and apparatus for reconstructing high frequency components with less computation

Also Published As

Publication number Publication date
JPS619780B2 (en) 1986-03-26

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