Resources Contact Us Home
Frequency subband encoding apparatus

Image Number 11 for United States Patent #5588024.

The invention provides a frequency subband encoding apparatus wherein the amount of comparison operation processing of a bit allocator is minimized. A subband filter divides a PCM signal into and outputs a plurality of frequency subbands. A SMR calculator calculates, for each of the frequency subbands, an SMR which is a ratio between a signal level and a mask level. A bit allocator calculates a reference NMR which is a value obtained by subtracting, from an SMR of the entire frequency band, a S/N ratio calculated from a reference bit number to be allocated to one of the frequency subbands which exhibits a maximum SMR, and adjusts the reference NMR to perform bit allocation to the frequency subbands.

  Recently Added Patents
Developing cartridge
Semiconductor memory device, method of controlling read preamble signal thereof, and data transmission method
Conversion of 5-(chloromethyl)-2-furaldehyde into 5-methyl-2-furoic acid and derivatives thereof
Disk drive to enable defect margining
Vehicle having power supply apparatus
Peer to peer (P2P) missing fields and field valuation feedback
Bit error mitigation
  Randomly Featured Patents
Tax-stampable half-carton
Ultrasonic oscillating device with a detachable ultrasonic oscillating assembly
Spring support in a compressed air firearm
Crimper fitting locator assembly
Dredge cutter head with shock absorber
Array jet velocity normalization
Flow volume control device for power steering system
Heavy-metal shrink fit cutting tool mount
Peg board sign holder
Electrolytic codeposition of metals and nonmetallic particles