System and method for stereo perceptual audio coding using adaptive masking threshold

Abstract

A method for stereo audio perceptual encoding of an input signal includes masking threshold estimation and bit allocation. The masking threshold estimation and bit allocation are performed once every two encoding processes. Another method for stereo audio perceptual encoding of an input signal includes performing a time-to-frequency transformation, performing a quantization, performing a bitstream formatting to produce an output stream, and performing a psychoacoustics analysis. The psychoacoustics analysis includes masking threshold estimation on a first of every two successive frames of the input signal.

Description

[0001] Cross References to Related Applications [0002] Pursuant to 35 U.S.C. §119(e), this application claims priority to U.S. Provisional Patent Application 60 / 758,369, filed January 12, 2006, which is hereby incorporated by reference. technical field [0003] The present disclosure relates generally to audio compression, and more particularly to systems and methods for low-power stereo-aware audio coding using adaptive masking thresholds. Background technique [0004] Digital audio transmission typically requires considerable storage space and bandwidth. For efficient transmission, signal compression is often employed. Efficient coding systems eliminate irrelevant and redundant parts of an audio stream in an optimized manner. The first goal above can be achieved by reducing psychoacoustic irrelevance through psychoacoustic analysis. "Perceptual audio coders" refer to those compression schemes that exploit the perceptual properties of human hearing. [0005] figure 1...

AI Technical Summary

Problems solved by technology

[0010] Encoder is much more complex than decoder due to psychoacoustic modules and bit allocation - quantization

Images