Resources Contact Us Home
Low-frequency-band component and high-frequency-band audio encoding/decoding apparatus, and communication apparatus thereof

Image Number 5 for United States Patent #7848921.

An audio encoding apparatus capable of improving a frame cancellation error tolerance without increasing a number of bits of a fixed codebook in a CELP type audio encoding. A linear prediction analyzer analyzes an input digital speech signal and outputs linear predictive coefficients. A linear predictive coefficients quantizer quantizes the linear predictive coefficients. A low-frequency-band component encoder encodes a down-sampled linear-predictive residual signal by a pulse-code-modulation encoder and generates low-frequency-band component encoded information, while a high-frequency-band component encoder encodes an error signal between a linear-predictive residual signal and an up-sampled signal of a decoded down-sampled linear-predictive residual signal by a code-excited-linear-prediction encoder and generates high-frequency-band component encoded information.

  Recently Added Patents
Method of making a CIG target by spray forming
Comparison of visual information
Method and apparatus for detection of LVDT core fallout condition
Tread portion of an automobile tire
Hydrolases, nucleic acids encoding them and methods for making and using them
System and method for self service marketing research
Wireless communication apparatus, a method of wireless communication, and a program for wireless communication
  Randomly Featured Patents
Arrangement having parallel-connected DC power supply units
Digital logical sequence controller
Method and apparatus for feeding reinforcing strand when making a tubular product
Port adaptor and protector and container having same
Apparatus for combining laser beams
Electrical junction box mounting bracket device and method
Interface unit for serial-to-parallel conversion and/or parallel-to-serial conversion
Oxygen absorbent and use thereof
Combined digital write and analog rewrite process for non-volatile memory