search for: input_frame

...sg) { SpeexBits bits; void* enc_state; // Initialize. speex_bits_init(&bits); enc_state = speex_encoder_init(&speex_nb_mode); int frame_size = 0; // get frame size. speex_encoder_ctl(enc_state,SPEEX_GET_FRAME_SIZE,&frame_size); int nbBytes = 0; //unsigned char *input_frame,*encodedstr; unsigned char *encodedstr; float* input_frame;//approx of frame size input_frame = new float[frame_size]; encodedstr = new unsigned char[MAX_FRAME_BYTES]; ZeroMemory(input_frame,frame_size); ZeroMemory(encodedstr,MAX_FRAME_BYTES); int pos = 0; unsigned char*result; re...

/input_frame/ is a /(float *)/ pointing to the beginning of a speech frame What is the range on the floats in the input_frame that speex_encode() needs? The library that I'm using to get the sound gives me floats that are between -1.0 and +1.0. I was assuming that this is also the case for speex, but I...

...reference says it is "+-2^16 range." Which is right? I've yet to successfully encode or decode anything. Jean-Marc Valin wrote: >It is documented and the range is +-32767 > > Jean-Marc > >Le mardi 07 juin 2005 ? 11:59 -0500, Matt DeMoss a ?crit : > > >>/input_frame/ is a /(float *)/ pointing to the beginning of a speech frame >> >>What is the range on the floats in the input_frame that speex_encode() >>needs? The library that I'm using to get the sound gives me floats that >>are between -1.0 and +1.0. >> >>I was assum...

...8kHz and 16 bits per sample, the frame size is 240, tail_length is long enough to cover the far end to near end delay) Experiment 1: A sine wave is generated in my test program (each frame has a random frequency). And the echo cancellation function is called: speex_echo_cancellation(echo_state, input_frame, echo_frame, output_frame); where input_frame has a delay of 4560 samples compared to echo_frame (i.e. 570 ms delay). I output the output_frame to Windows Media API and playback in my speaker. The echo cancellation performs quite well (around 10% noise/echo left). Experiment 2: A sine wave is...

Hi all Sorry if this is a dumb question: does the input_frame passed to speex_encode_int *have* to be frame_size samples long? e.g., If I only have 100 samples left to encode (which is less than the frame_size of 160 samples), can I just use an array that contains 100 samples, or do I need to create an array containing the 100 "real" samples plu...

Hello, I'm trying to use the speexlib but I just can't do it. I've made just like the example (on the site) says. Some times I get SIGFAULT. Also, I'm reading the input_frames from /dev/dsp (directly). What is missing here? speex_bits_init(&bits); enc_state = speex_encoder_init(&speex_nb_mode); speex_encoder_ctl(enc_state, SPEEX_GET_FRAME_SIZE, &frame_size); for(n=0; n<100; n++) { read_from_dev(fd1, (float *)input_frame, 1024); speex...

...![endif]--> <div class="Section1"> <p class="MsoNormal">Hi all<o:p></o:p></p> <p class="MsoNormal"><o:p>&nbsp;</o:p></p> <p class="MsoNormal">Sorry if this is a dumb question: does the input_frame passed to speex_encode_int *<b>have</b>* to be frame_size samples long?<o:p></o:p></p> <p class="MsoNormal"><o:p>&nbsp;</o:p></p> <p class="MsoNormal">e.g., If I only have 100 samples left to encode (which is le...

I'm confused about the format of the PCM/WAV data for speex_encode & speex_decode speex_encode(enc_state, input_frame, &bits); In the manual, it says "input_frame is a (float *) pointing to the beginning of a speech frame" (for encode) But I've found that in speexenc.c and testenc.c, short* is used instead of float* So, isn't it signed 16 bit samples(if 16bit) or float? For vorbis, I...

...on failed, it seens that there is a delete in any where. i've encapsulated echo canceller in a class that storage the state and simply call the functions: void EchoCanceller::Playback(short *echo_frame) { speex_echo_playback(echo_state, echo_frame); } void EchoCanceller::Capture(short *input_frame, short *output_frame, int* residue) { speex_echo_capture(echo_state, input_frame, output_frame, residue); } the class has been tested, and the problem is in the calls. has any body had the same problem? than you.

Hi Folks, I am having trouble using speex_echo_cancel. As a starting point, I am using the testecho.c source code. I compiled the 1.2beta1 version. I have not tried any other versions of speex. The document says that the order of arguments to Speex_echo_cancel is (echo_state, input_frame, echo_frame, output_frame, residue) where "input_frame" is as captured from mic and "echo_frame... was played from the speaker." Speex_echo_cancel calls these parameters (st, ref, echo, out, Yout). The name "ref" is confusing to me, but the implementation of speex_ec...

...ame size is 240, tail_length is long enough to cover the far end to near end delay) > > > Experiment 1: > > A sine wave is generated in my test program (each frame has a random frequency). And the echo cancellation function is called: > > speex_echo_cancellation(echo_state, input_frame, echo_frame, output_frame); > > where input_frame has a delay of 4560 samples compared to echo_frame (i.e. 570 ms delay). I output the output_frame to Windows Media API and playback in my speaker. The echo cancellation performs quite well (around 10% noise/echo left). > > > >...

...I can hear the echo of my every word while I talks on the land line phone. I am using G.711 codec, frame_size 80 and both 1024 and 2048 tail length. The code was compiled as floating point and fixed point in the PC. But noneof them help. I made sure the the synchronization between echo_frame and input_frame was stable and the delay is consistant about 10ms. The echo return lossis around 20db but output_frame and input_frame signal is about the same. I even tried Jean-Marc's latest mdf.c from the subversion but no luck. Has anyone test the performance in any other softphones and how well does it w...

Hi Jean-Marc, Thanks for the suggesting. I tried the test wtih my recording file offline through the testecho. I got the same result(no prepocessor echo suppression) as my recording file for that live call. Basically I don't see the difference between input_frame and output_frame. As I mentioned in my original post, the echo return loss is about 20db. I guess the echo cancelleris not really actively cancelling the echo in such condition? But without the echo sppression/NLP, echo is still noticable. I used the same onboard sound card for the speaker and m...

...lerDate: Tue, 6 Mar 2007 01:39:11 -0800 Hi Jean-Marc, Thanks for the suggesting. I tried the test wtih my recording file offline through the testecho. I got the same result(no prepocessor echo suppression) as my recording file for that live call. Basically I don't see the difference between input_frame and output_frame. As I mentioned in my original post, the echo return loss is about 20db. I guess the echo cancelleris not really actively cancelling the echo in such condition? But without the echo sppression/NLP, echo is still noticable. I used the same onboard sound card for the speaker and m...

...for easy readability. Sorry about mess. Hi Jean-Marc, Thanks for the suggesting. I tried the test wtih my recording file offline through the testecho. I got the same result(no prepocessor echo suppression) as my recording file for that live call. Basically I don't see the difference between input_frame and output_frame. As I mentioned in my original post, the echo return loss is about 20db. I guess the echo canceller is not really actively cancelling the echo in such condition? But without the echo sppression/NLP, echo is still noticable. I used the same onboard sound card for the speaker and...

Hi everybody, I have been using speex-1.2beta1 and my input data is 8-bit unsigned so I know that I should convert from 8 to 16 bits. I've done the convertion as following. for(int i=0; i<160; ++i) { input_frame[i] = (short)( (data[2*i] << 8) | data[2*i+1]); } When my codec application didn't work right, I think that the reason is an error at this convertion. For this aim, I looked at read_samples function in speexenc project and I can't understand why the convertion is done in thi...

...quot;)] public static extern void speex_bits_init(SpeexBits *bits); [DllImport("libspeex.dll")] public static extern int speex_bits_write(SpeexBits *bits, IntPtr bytes, int max_len); // char * ... /* some global variables */ int frame_size; void *enc_state; SpeexBits enc_bits; short[] input_frame; ... /* from Constructor */ ... enc_bits = new SpeexBits(); enc_state = speex_encoder_init_new(0); speex_encoder_settings(enc_state, 3, 8000, 10, 11000); fixed (int *fSize = &frame_size) { speex_encoder_ctl(enc_state, SPEEX_GET_FRAME_SIZE, fSize); } fixed (SpeexBits *bitsAdd = &enc_bits)...

...n single array in VB to a float array in C which can be encoded. And the output of the encoder have to be unsigned char because in VB its an byte array. Here are my first steps but it don´t work and i don´t come forward. Hopefully someone can help me! CALL int __stdcall EncodeSpeexFrame (float *input_frame, unsigned char *output_bytes, int input_size) { int MAX_NB_BYTES, nbBytes; char *output_buffer; unsigned char *temp_buffer; float *input_buffer; input_buffer = new float (input_size); input_buffer = input_frame; speex_bits_reset(&enc_...

Speex 1.0.3 uses floats, but the unstable version 1.1.x uses short. Jean-Marc Le ven 16/04/2004 16:04, Kenji Chan a crit : > Im confused about the format of the PCM/WAV data for speex_encode & > speex_decode > > speex_encode(enc_state, input_frame, &bits); > > In the manual, it says input_frame is a (float *) pointing to the > beginning of a speech frame (for encode) > > But Ive found that in speexenc.c and testenc.c, short* is used > instead of float* > > > > So, isnt it signed 16 bit samples(if 16bi...

The example in the documentation demonstrates using speex_bits_reset before encoding and decoding each frame. " speex_bits_reset(&bits); speex_encode(enc_state, input_frame, &bits); nbBytes = speex_bits_write(&bits, byte_ptr, MAX_NB_BYTES); " What happens if this is not done? I think I'm missing the point of having a SpeexBits object.