Computer program product for adaptive audio signal shaping for improved playback in a noisy environment

摘要

Provided is a computer program product for adaptively enhancing an end-user's perceived quality, or quality of experience (QoE), of speech and other audio under ambient noise conditions. The computer program product comprises the steps of determining the ambient noise characteristics on a continuous basis to capture the time varying nature of ambient noises, and adaptively determining the most optimal signal shaping to be applied to the audio/speech signal to produce the most appropriate enhancement to compensate for the ambient noise impairment. The computer program product also comprises a signal shaping technique by using an infinite impulse response (IIR) filter that performs the signal modification with a low delay; a multi-level automatic gain control (AGC); and a controlled amplitude clipping module that assures samples are below a certain limit; and outputs the modified signal for playback through a loudspeaker or the like.

主权项

1. A non-transitory computer program product comprising a computer useable medium having computer program logic stored therein, said computer program logic for enabling a computer processing device to improve the quality of a far-end audio signal for playback on a device in a noisy environment, said device having a speaker and a single microphone, said computer program product comprising:
code for continuously monitoring a near-end noise audio signal through the single microphone; code for continuously determining near-end noise characteristics from said near-end noise audio signal; code for comparing said near-end noise characteristics from previous near-end noise characteristics to detect a change in said near-end noise audio signal; upon detecting a change, code for identifying an optimal signal shaping filter based on said near-end noise characteristics; code for applying said optimal signal shaping filter to the far-end audio signal to produce an optimized far-end audio signal; and code for outputting said optimized far-end audio signal to the speaker.