An Audio Object Codec Method Adapted to Streaming Media

Abstract

The present invention provides an audio object encoding and decoding method suitable for streaming media. During encoding, multiple input audio object signals are first preprocessed to obtain data blocks composed of multi-frame audio object signals and corresponding monophonic channels containing all objects. Mixed signal; calculate gain matrix, extract ODLR parameter matrix; obtain low-dimensional coefficient matrix and base matrix through matrix decomposition of gain matrix and parameter matrix; finally combine mixed signal, coefficient matrix, and base matrix into code stream; firstly divide decoding stream when decoding , reconstruct the parameter matrix according to the coefficient matrix and the basis matrix; then reconstruct the audio object signal according to the parameter matrix and the mixed signal. This method supports the transmission of audio data in the form of data blocks, which can be applied to streaming media application scenarios; and improves the parameter frequency domain resolution, and uses the method based on weighted matrix decomposition to reduce the code rate required for parameter encoding, which can ensure low bit rate and high quality to reconstruct the audio object signal.

Description

technical field [0001] The invention relates to the field of digital audio signal processing, relates to audio object coding, in particular to high-quality compression coding of multiple audio objects suitable for streaming media. Background technique [0002] Audio coding technology has developed from traditional mono and stereo coding technology to more immersive multi-channel audio coding technology, and based on multi-channel audio coding technology, the coding and reconstruction of 3D audio scenes has been realized. However, an audio scene is composed of audio objects, and the traditional channel-based audio coding technology cannot directly encode audio object signals, and has low flexibility, so it cannot meet the user's needs for individual audio object tracks and personalized reconstruction of audio scenes. Audio object-based audio coding technology can encode and transmit multiple independent audio objects, so as to ensure the flexibility, accuracy and personalized...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the technical problems existing in the existing audio object coding methods, the present invention provides an audio object coding method that can realize high-quality coding of multiple audio objects at a low bit rate and is suitable for streaming media

Images