GB1372579A - Reproducing device for artificial four channel stereo - Google Patents

Reproducing device for artificial four channel stereo

Info

Publication number
GB1372579A
GB1372579A GB5183971A GB5183971A GB1372579A GB 1372579 A GB1372579 A GB 1372579A GB 5183971 A GB5183971 A GB 5183971A GB 5183971 A GB5183971 A GB 5183971A GB 1372579 A GB1372579 A GB 1372579A
Authority
GB
United Kingdom
Prior art keywords
signals
loudspeakers
phase
channel stereo
nov
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.)
Expired
Application number
GB5183971A
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
Publication of GB1372579A publication Critical patent/GB1372579A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation 
    • H04S5/02—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation  of the pseudo four-channel type, e.g. in which rear channel signals are derived from two-channel stereo signals

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)

Abstract

1372579 Four channel stereo systems PIONEER ELECTRONIC CORP 8 Nov 1971 [9 Nov 1970] 51839/71 Heading H4R A device reproduces two channel stereo signals over four loudspeakers 20, 22, 26, 29 by deriving two extra signals from the two stereo signals and feeding them to two loudspeakers 26, 29 arranged at the rear of the listening area. As described the signals for the rear loudspeakers are derived by taking the difference between the left and right channel signals, applied to terminals of the mixing circuit 23, and feeding the resulting signal to two phase shifting circuits 24, 27, which produce phase shifts which differ by approximately 90 degrees over the frequency range in use. The phase shifting circuits each comprise the cascaded connection of three phase shift circuits each of which has a different phase frequency characteristic. A reverberation device or delay circuit can be provided in the feed to the mixer 23.
GB5183971A 1970-11-09 1971-11-08 Reproducing device for artificial four channel stereo Expired GB1372579A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9791870 1970-11-09

Publications (1)

Publication Number Publication Date
GB1372579A true GB1372579A (en) 1974-10-30

Family

ID=14205066

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5183971A Expired GB1372579A (en) 1970-11-09 1971-11-08 Reproducing device for artificial four channel stereo

Country Status (3)

Country Link
DE (1) DE2155226A1 (en)
GB (1) GB1372579A (en)
ZA (1) ZA717379B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2209110A (en) * 1987-08-26 1989-04-26 Microbourne Limited Sound reproduction system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2736558A1 (en) * 1976-08-17 1978-02-23 Novanex Automation Nv PHASESTEREOSYSTEM
JPS61281799A (en) * 1985-06-07 1986-12-12 Dainabekutaa Kk Sound signal reproducing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2209110A (en) * 1987-08-26 1989-04-26 Microbourne Limited Sound reproduction system

Also Published As

Publication number Publication date
ZA717379B (en) 1972-07-26
DE2155226A1 (en) 1972-05-10

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees