Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Two-stage compression and expansion of coupling processed multi-channel sound signals for transmission and recording










Image Number 3 for United States Patent #5873065.

A multi-channel signal compressor for compressing digital sound signals in the respective channels of a multi-channel sound system. The apparatus comprises a first-stage compression system and a second-stage compression system. In the first-stage compression system, a coupling circuit performs coupling between the digital sound signals of at least two of the channels to generate coupling-processed signals, one for each of the channels. A compressor circuit receives the coupling-processed signals from the coupling circuit and frequency divides each coupling-processed signal into frequency range signals in respective frequency ranges, and compresses the frequency range signals obtained by dividing each coupling-processed signal to generate a first-stage compressed signal. In the second-stage compression system, a determining circuit receives the first-stage compressed signal for each channel from the first-stage compression system and determines an energy for each channel from the first-stage compressed signal of the respective channel. A channel bit apportionment decision circuit operates in response to the determining circuit, and apportions a predetermined number of bits among the channels to apportion a number of bits to each channel. Finally, an additional compressor additionally compresses the first-stage compressed signal of each channel using, for each channel, the number of bits apportioned to the respective channel by the channel bit apportionment decision circuit.








 
 
  Recently Added Patents
Method for producing male sterile plants using plant beclin 1/ATG6 expression
Projection-type video-image display apparatus
Fuel-based injection control
Changing a system clock rate synchronously
Plants and seeds of hybrid corn variety CH450823
Image processing system, image processing method and program for image processing
Bipolar transistor with diffused layer between deep trench sidewall and collector diffused layer
  Randomly Featured Patents
Chandelier
Water soluble rosin acid esters
Heat removal system and method for light emitting diode lighting apparatus
Dubbing apparatus for audio equipment
Pressurized vessel for a water closet flushing system
Organophilic phyllosilicates
Golf ball dog statue
Image forming device for forming image on roll of photosensitive/pressure-sensitive recording medium
Output stage having zener voltage balancing
Burglar alarm