If the left and right channels are processed separately as you do,
the parameter Mic-Number in speex_echo_state_init_mc should be 1, not 2
On Wed, Feb 10, 2010 at 4:00 AM, <speex-dev-request at xiph.org> wrote:
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> 1. Stereo AEC (Nicholas Xu)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 9 Feb 2010 22:58:58 +0800
> From: Nicholas Xu <xunich at gmail.com>
> Subject: [Speex-dev] Stereo AEC
> To: speex-dev at xiph.org
> Message-ID:
> <de841d8e1002090658o7c26c4bag20b99bd305c422f9 at
mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi,
>
> Can anybody show me how to enable stereo AEC, I tried with the
> following code and the result is bad, degraded output.
>
> Init:
>
> ec_state = speex_echo_state_init_mc(frame_size, aec_tail, 2, 2);
> speex_echo_ctl(ec_state, SPEEX_ECHO_SET_SAMPLING_RATE, &sample_rate);
>
> preprocess_state_left = speex_preprocess_state_init(frame_size,
> sample_rate);
> preprocess_state_right = speex_preprocess_state_init(frame_size,
> sample_rate);
>
> speex_preprocess_ctl(preprocess_state_left ,
> SPEEX_PREPROCESS_SET_ECHO_STATE, ec_state );
> speex_preprocess_ctl(preprocess_state_right ,
> SPEEX_PREPROCESS_SET_ECHO_STATE, ec_state );
>
> AEC:
>
> speex_echo_cancellation(ec_state, mic, echo_ref, output);
> speex_preprocess_run(preprocess_state_left, output);
> speex_preprocess_run(preprocess_state_right, output);
>
> Is there anything wrong with my code?
>
> Thanks in advance.
> Nicholas
>
>
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> End of Speex-dev Digest, Vol 69, Issue 8
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