Design and performance of robust embedded ADPCM coder

Zhang, Z.; Lockhart, G.B.

doi:10.1049/el:19911111

Cited by 5 publications

(1 citation statement)

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“…Based on the realization in (9), we can further simply the equation of the coefficient al as shown in (10) Obviously, we can notice that the coefficient equations in (13), (14) and the autocorrelation in (8) are much simpler than those in (3), (4) and (5). From now on, we will use (8), (13) and (14) instead to implement the system.…”

Section: Simplification Of the Coefficient A And A2mentioning

confidence: 99%

A low computational predictor coefficient algorithm for ADPCM implementation of portable recording devices

Boonyakitmaitree

Nandhasri

Ngarmnil

The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.

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This paper proposes a modification of ADPCM algorithm to be suitable for hardware implementation of portable audio devices. This is accomplished by a simplification of predictor coefficient algorithm which normally requires a high complexity correlation algorithm, while the sound quality measured as SNR remains relatively the same to those of the original ADPCM. The less complicated calculation results in a reduction of the chip area and power consumption, thus it is suitable for pocket solid-state speech and audio recorder. Simulations on MATLAB verify the performances and experimental results on XILINX FPGA synthesis confirming the functionalities and significant reduction of device count by 63% of the implementation by the original algorithm.

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Section: Simplification Of the Coefficient A And A2mentioning

confidence: 99%