search for: speex_submode_bits_per_frame

Hi, Is there any way to determine frame size in bits or bytes of encoded frame in WB mode for given quality? That is I need to know how many bits encoded frame will occupy in RTP packet. I see SPEEX_SUBMODE_BITS_PER_FRAME request, but it works like this only for NB mode, and for WB mode it return size of WB "subframe" (?) only. -- Regards, Alexander Chemeris. SIPez LLC. SIP VoIP, IM and Presence Consulting http://www.SIPez.com tel: +1 (617) 273-4000

Hi there. I am having a little trouble understanding the frame sizes chosen by the codec. testenc_uwb.c from the speex-1.0 source distribution has a framesize of 640 hardcoded and makes use of this value exclusively. However, a mode query on the actual codec returns 320 as a framesize for this mode. int tmp; speex_mode_query(&speex_uwb_mode, SPEEX_MODE_FRAME_SIZE, &tmp);

Hello everyone, I'm finally beginning to use Speex for a project. As expected, the implementation so far has been very easy and I am thrilled with the capabilities and flexibility of Speex, especially the new features in 1.1. My efforts so far have resulted in a couple of questions: 1) I was interested in fetching the default quality setting for narrowband:

> Ok, here is cleaned up and fixed version. > > * Function is named speex_get_num_frames() now and return > number of frames, as you suggested. > * WB layers sizes are taken from wb_skip_table[], while NB frame > sizes are calculated with speex_mode_query(). Looking better. Just make sure to remove the stuff that isn't C99-compatible (e.g. // comments). > I've

...RY. Well, let's first merge your code and then we'll see about possible simplifications. >> frame: 20 ms encoding >> sub-frame: 5 ms encoding (internal) >> layer: one frame of nb or sb >> sb: sub-band >> wb: nb+sb >> uwb: nb+sb+sb > > Hum... Then SPEEX_SUBMODE_BITS_PER_FRAME macro have > wrong name. Well, I haven't quite defined whether a frame includes all "layers" or just one... > This is what I was trying to ask in my previous mail. > Now it return number of bits in one layer (nb or sb), while I expected > it to return number of bits in...

...d frame size (for narrowband, 160 * sizeof(short)), > butwhat about the size of the compressed data? If I'm not using VBR, > Iassume that size is going to be constant, yes? But is there a way > forSpeex to tell me what that value is before I begin encoding? Use speex_mode_query with SPEEX_SUBMODE_BITS_PER_FRAME You need to pass the submode number with the pointer and the number of bits per frame is returned using the same pointer. Note that with speex_mode_query, the first argument is the mode (e.g. &speex_nb_mode), not the encoder/decoder state. Jean-Marc -- Jean-Marc Valin http://www.xip...

> Use speex_mode_query with SPEEX_SUBMODE_BITS_PER_FRAME > You need to pass the submode number with the pointer and the number of > bits per frame is returned using the same pointer. Note that with > speex_mode_query, the first argument is the mode (e.g. &speex_nb_mode), > not the encoder/decoder state. Thank you Jean-Marc, This works w...

...determined by the selected mode of > compression. SPEEX_MODE_FRAME_SIZE returns the size of the compressed > frame. and it will vary depending upon the mode selected. No. SPEEX_MODE_FRAME_SIZE returns the number of samples in a frame, not the encoded size. Encoded size can be obtained with SPEEX_SUBMODE_BITS_PER_FRAME Jean-Marc -- Jean-Marc Valin <Jean-Marc.Valin@USherbrooke.ca> Universit? de Sherbrooke

...ght, inband handling is different, but it's a matter of one flag, passed to functioin. Probably not that much to keep code DRY. > frame: 20 ms encoding > sub-frame: 5 ms encoding (internal) > layer: one frame of nb or sb > sb: sub-band > wb: nb+sb > uwb: nb+sb+sb Hum... Then SPEEX_SUBMODE_BITS_PER_FRAME macro have wrong name. This is what I was trying to ask in my previous mail. Now it return number of bits in one layer (nb or sb), while I expected it to return number of bits in one frame (nb or wb or uwb). I want to get information about frame sizes to estimate bitrate for CBR operation and bitra...

...e fact you need to check my statement about wb_skip_table? > >> frame: 20 ms encoding > >> sub-frame: 5 ms encoding (internal) > >> layer: one frame of nb or sb > >> sb: sub-band > >> wb: nb+sb > >> uwb: nb+sb+sb > > > > Hum... Then SPEEX_SUBMODE_BITS_PER_FRAME macro have > > wrong name. > > Well, I haven't quite defined whether a frame includes all "layers" or > just one... It would be good to define - it is very misleading for newcomers as it is now. And I would like to say, that from user point of view "frame" me...

..._bits_unpack_unsigned(bits, 1); if (wideband) /* Skip wideband block (for compatibility) */ { //int submode; int advance; advance = /*submode =*/ speex_bits_unpack_unsigned(bits, SB_SUBMODE_BITS); speex_mode_query(&speex_wb_mode, SPEEX_SUBMODE_BITS_PER_FRAME, &advance); if (advance < 0) { speex_notify("Invalid mode encountered. The stream is corrupted."); return -2; //<----------------------*this is where I drop out* } and drops out with a return of -2 because advanc...

..._unsigned(bits, 1); if (wideband) /* Skip wideband block (for compatibility) */ { //int submode; int advance; advance = /*submode =*/ speex_bits_unpack_unsigned(bits, SB_SUBMODE_BITS); speex_mode_query(&speex_wb_mode, SPEEX_SUBMODE_BITS_PER_FRAME, &advance); if (advance < 0) { speex_notify("Invalid mode encountered. The stream is corrupted."); return -2; //<----------------------*this is where I drop out* } and drops out with a return of -2 be...

..._bits_unpack_unsigned(bits, 1); if (wideband) /* Skip wideband block (for compatibility) */ { //int submode; int advance; advance = /*submode =*/ speex_bits_unpack_unsigned(bits, SB_SUBMODE_BITS); speex_mode_query(&speex_wb_mode, SPEEX_SUBMODE_BITS_PER_FRAME, &advance); if (advance < 0) { speex_notify("Invalid mode encountered. The stream is corrupted."); return -2; //<----------------------*this is where I drop out* } and drops out with a return of -2 because advanc...

...speex_bits_unpack_unsigned(bits, 1); if (wideband) /* Skip wideband block (for compatibility) */ { int submode; int advance; advance = submode = speex_bits_unpack_unsigned(bits, SB_SUBMODE_BITS); speex_mode_query(&speex_wb_mode, SPEEX_SUBMODE_BITS_PER_FRAME, &advance); if (advance < 0) { speex_warning ("Invalid wideband mode encountered. Corrupted stream?"); return -2; } advance -= (SB_SUBMODE_BITS+1); speex_bits_advance(bits, advance);...