search for: decoer

...ans that I need fill the low 4 bit with zero to make the input data is 16 bit, I means that Some computation may be simplified so that to reduce computation power because the just 12 bit is useful. And the DAC is also 12 bit, it means that I just need the high 12 bit and discard the low 4 bit after decoer? Thanks. Best Regards, Cheng Rong

...the low 4 bit with zero to make the > input data is 16 bit, I means that Some computation may be simplified > so that to reduce computation power because the just 12 bit is useful. > And the DAC is also 12 bit, it means that I just need the high 12 bit > and discard the low 4 bit after decoer? That's what I said. It's not going to work. It's not because your input signal is 12-bit deep that suddenly the LPC and LSP coefs will accept being quantised in 12 bits. Also, as I said in my previous email, I'd recommend shifting your 12-bit data only by 3 (not by 4) when convert...

Hi, all, I am porting speex on ARM7TDMI, I have done some optimization, the result is that the encoder and decoder need about 60 MCPS for 5.96kbps bitrate and complexity 0. Can someone give me informtion about Speex optimization on ARM7? Another question, my ADC and DAC are 12 bits, but Speex codec is 16bits, Did someone try to modify speex to 12 bits? I think if I modify speex to 12 bits, the