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
Low drop-out regulator providing constant current and maximum voltage limit
Lid for a container
Nanoparticle entrapment of materials
Resist composition and method for producing resist pattern
Method and system for cooling of integrated circuits
Light emitting device power supply circuit, and light emitting device driver circuit and control method thereof
Thermal conductivity and phase transition heat transfer mechanism including optical element to be cooled by heat transfer of the mechanism
  Randomly Featured Patents
Photon arrival time detection
Magneto-rheological clutch and wheel transmission apparatuses and methods
Rekeyable lock cylinder assembly
Word line boost circuit and method
Fountain faucet
Bis-substituted benzyl acetic acids
Automatic adsorption tower switching system
Method of assembling banks of battery electrodes
Sponge brush
Single circuit ladder resonator quadrature surface RF coil