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Hi, I'm using an ADPCM implementation from the old ADSP-21xx application handbook. It claims to be compliant with the G.721 standard, but when I pass the ITU test vectors through the algorithm, the output is not correct. The PCM/ADPCM waveform looks like the target vector though, but it is not exactly the same. Does anyone know of any errors in this implementation? The application book is 13 years old, so I can't be the first person trying to use this source code. Regards, Jesper |
Analog Devices G.721 ADPCM implementation
Started by ●September 4, 2001
