PatentVote.com: Vote on your favourite invention!

Next ten patents ordered by date:
Priority mixer control
Acoustic coupler assembly
Resolution enhanced sound detecting apparatus
Method and apparatus for enciphering and deciphering audio information
High common mode relay multiplexer
Method and apparatus for fault detection in PCM muliplexed system
Frequency band compression of FDM using time expansion
Identifier circuit for identifying party line subscribers
Telephone apparatus
Modulated RF carrier distributing arrangement for key telephone line circuits
Translate:
En
De
Es
Fr
It
Pt
Ja
Ko
Zh 

 

Title: Multichannel matrix logic and encoding systems

Abstract: Apparatus and methods relating to "quadrasonic" encoding and decoding systems, including synthetic supplementary channel systems, matrix logic systems, and systems employing stereo compatible matrix variations.


Do you think this is a good invention? Vote now:

 Votes so far: For:(0) Against:(0)
Other info:


Inventors: Cooper, Duane H. (Champaign, IL, US)

Application Number: 836524
Filing Date: 1977-09-26
Publication_date: 1979-04-10
Assignee:
Primary Class(es): 381/20
Other Classes:
US Patent Ref:
3940559Feb, 1976Bauer179/1.

Other Refs:
Primary Examiner: Claffy, Kathleen H.
Assistant Examiner: Chayt, Kenneth A.
Attorney: Fitch, Even & Tabin