A memory efficient finite-state source coding algorithm for audio MDCT coefficients

作者：Jiang, Sumxin^*; Yin, Rendong; Liu, Peilin

来源：EURASIP Journal on Audio Speech and Music Processing, 2014, 2014(1): 22.

DOI：10.1186/1687-4722-2014-22

• Coding performance
• Inter-frame dependency
• Memory requirements
• Modified discrete cosine transforms
• Multiple components
• Source-coding algorithm
• Speech and audio coding
• Vector quantizers

To achieve a better trade-off between the vector dimension and the memory requirements of a vector quantizer (VQ), an entropy-constrained VQ (ECVQ) scheme with finite memory, called finite-state ECVQ (FS-ECVQ), is presented in this paper. The scheme consists of a finite-state VQ (FSVQ) and multiple component ECVQs. By utilizing the FSVQ, the inter-frame dependencies within source sequence can be effectively exploited and no side information needs to be transmitted. By employing the ECVQs, the total memory requirements of the FS-ECVQ can be efficiently decreased while the coding performance is improved. An FS-ECVQ, designed for the modified discrete cosine transform (MDCT) coefficients coding, was implemented and evaluated based on the Unified Speech and Audio Coding (USAC) scheme. Results showed that the FS-ECVQ achieved a reduction of the total memory requirements by about 11.3%, compared with the encoder in USAC final version (FINAL), while maintaining a similar coding performance.

• 出版日期2014-5-12
• 单位上海交通大学