SPECTRAL SHAPING OF RECONSTRUCTION NOISE IN BACKWARD ADPCM CODING

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ALIPOOR GH.; SAVOJI M.H.

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Journal: NASHRIYYAH -I MUHANDISI -I BARQ VA MUHANDISI -I KAMPYUTAR -I IRAN, B- MUHANDISI -I KAMPYUTAR Year:2014 | Volume:12 | Issue:1 Page(s): 75-80

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Title

SPECTRAL SHAPING OF RECONSTRUCTION NOISE IN BACKWARD ADPCM CODING

Author(s)

ALIPOOR GH. | SAVOJI M.H. | Issue Writer Certificate

Keywords

BACKWARD ADAPTIVE PREDICTIONQ3

NOISE SPECTRAL SHAPINGQ2

SPEECH CODINGQ2

ADPCM CODINGQ2

SPEECH PERCEPTUAL QUALITYQ2

Abstract

The main idea in ADPCM CODING is to remove the redundancies of the speech signal before quantization. One of the important characteristics of this coding scheme is the spectral flatness of the reconstruction noise in spite of its low level. It has been tried, in the present research, to improve the perceptual quality of the reconstructed signal by shaping the spectrum of the reconstruction noise using an all-zero filter in the backward ADPCM CODING. By doing so, a useful compromise is achieved between the level and the spectral shape of the reconstruction noise. The obtained results show an improvement in the perceptual quality of the reconstructed signal (higher PESQ score) and an increase in the noise level (lower SNR).

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APA: Copy

ALIPOOR, GH., & SAVOJI, M.H.. (2014). SPECTRAL SHAPING OF RECONSTRUCTION NOISE IN BACKWARD ADPCM CODING. NASHRIYYAH -I MUHANDISI -I BARQ VA MUHANDISI -I KAMPYUTAR -I IRAN, B- MUHANDISI -I KAMPYUTAR, 12(1), 75-80. SID. https://sid.ir/paper/228404/en

Vancouver: Copy

ALIPOOR GH., SAVOJI M.H.. SPECTRAL SHAPING OF RECONSTRUCTION NOISE IN BACKWARD ADPCM CODING. NASHRIYYAH -I MUHANDISI -I BARQ VA MUHANDISI -I KAMPYUTAR -I IRAN, B- MUHANDISI -I KAMPYUTAR[Internet]. 2014;12(1):75-80. Available from: https://sid.ir/paper/228404/en

IEEE: Copy

GH. ALIPOOR, and M.H. SAVOJI, “SPECTRAL SHAPING OF RECONSTRUCTION NOISE IN BACKWARD ADPCM CODING,” NASHRIYYAH -I MUHANDISI -I BARQ VA MUHANDISI -I KAMPYUTAR -I IRAN, B- MUHANDISI -I KAMPYUTAR, vol. 12, no. 1, pp. 75–80, 2014, [Online]. Available: https://sid.ir/paper/228404/en

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