Resources Contact Us Home
Compressed data recording and/or reproducing apparatus and signal processing method

Image Number 8 for United States Patent #5438643.

Apparatus for recording an information signal as bit-compressed digital data. The apparatus comprises a bit compressor and a recording system. The bit compressor receives the information signal as digital data. The digital data include bits, and the bits include redundant bits. The bit compressor compresses the digital data by removing only the redundant bits from the digital data to generate the bit-compressed digital data at a variable bit rate. The redundant bits are bits that result in a quantizing noise level lower than an allowed noise level at which the quantizing noise is imperceptible to a human auditory sense. The allowable noise level is determined by a masking threshold and a minimum audibility limit. The recording system receives the bit-compressed digital data from the bit compressor and records the bit-compressed data on a recording medium.

  Recently Added Patents
Phase lock loop with injection pulse control
Method of adenoviral vector synthesis
PC secure video path
Paper product with surface pattern
Validating the configuration of distributed systems
Computer implemented apparatus for generating and filtering creative proposal
Data transfer operation completion detection circuit and semiconductor memory device provided therewith
  Randomly Featured Patents
Retraction apparatus and method of use
Electronic musical instrument having multiplexed keying
Flat head screw
Process for photocatalysis and two-electron mixed-valence complexes
Method for manufacturing acoustical devices and for reducing especially wind disturbances
Karaoke system and contents storage medium therefor
Rubber composition
Dendritic enriched secreted lymphocyte activation molecule
System for production of ethanol and co-products with fractionation of feedstock and solvent washing of fermentation product
System and method of using acoustic models for automatic speech recognition which distinguish pre- and post-vocalic consonants