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
Medical diagnosis, therapy, and prognosis system for invoked events and methods thereof
Optical fixing device and image forming apparatus
Power converter for an LED assembly and lighting application
Substrate and patterning device for use in metrology, metrology method and device manufacturing method
System and method for deposition in high aspect ratio magnetic writer heads
Decrementing settings for a range of power caps when a power cap is exceeded
Sample analyzing device
  Randomly Featured Patents
System and method for comparing and reviewing documents
Pocket driver tool
Process for the preparation of metal oxide catalysts and metal oxide supported catalysts
Prepaid calling time processing: a method and apparatus for processing pre-paid calling time in a telephone communication system
Polyisocyanate compositions for the preparation of flexible polyurethane foams
Optical fibre preform manufacture
Process for forming watering notches in an irrigation ditch and apparatus adapted for use with the process
Gyroscopes and compensation
Bioadhesive, closed-cell foam film, sustained release, delivery devices and methods of making and using same
Method and apparatus providing removal of replicated objects based on garbage collection