Psychoacoustic model and its application in MP3 encoding
Abstract: The psychoacoustic model is the core part of audio perceptual coding, which directly affects the quality and compression ratio of audio coding.
Based on the basic principles of psychoacoustics, the absolute hearing threshold, the masking effect, and the critical frequency band and other related content, combined with the mathematical expression of psychoacoustics, and analyze the algorithm flow in detail according to each module in the standard MP3 encoding program. Finally, the corresponding algorithm is used to describe the pre-echo generation mechanism and its suppression method in MP3 encoding.
Psychoacoustic model and its application in MP3 encoding
Psychoacoustic models and their applications in perceptual audio coding
In this paper, the AAC psychoacoustic model is discussed from the aspects of over-masking, forward and backward time-domain masking, FFT window coefficient analysis, and window shift criterion. Each individually masked…
Auditory psychoacoustic models and their applications in perceptual audio coding
First, the paper describes the masking effect, discusses the principles and algorithms of various perceptual audio coding standards, and focuses on the development process and features of the MPEG audio coding standard. There are two psychoacoustic models: model 1 and model 2. Level 1.
Application of the psychoacoustic model in HDTV digital audio
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Application of the psychoacoustic model in the detection of abnormal loudspeaker sound
China is the largest country in speaker production, and the annual output of speakers can reach hundreds of millions. Due to some unpredictable situations in the speaker design and production process, speaker failure occurs. Therefore, after the speaker is produced, the first product…
Application of the psychoacoustic model in digital audio watermarking
Audio digital watermarking technology plays an increasingly important role in protecting the copyright of digital audio works, and is an effective means of solving the problem of copyright of audio works. digital.A digital watermark algorithm based on a psychoacoustic model is proposed, which can guarantee a good audio signal.. .
An adaptive audio watermarking algorithm that combines the MP3 encoding principle and the psychoacoustic model
Through the investigation of the mp3 encoding algorithm, combined with a psychoacoustic model, a watermarking algorithm for copyright protection of MP3 audio files is proposed. The embedding algorithm runs simultaneously with the compression process. First, reduce the dimension of the embedded watermark information, and then use MP3 encoding to make…
