similar to: CELT 0.7.1 is out -- sort of

Dear CELT Developers, I wrote a proposal on how to integrate CELT into Digital Radio Mondiale (DRM+). The CELT codec has been integrated in the Spark transmission software and SoDiRa receiver software. Please download the proposal here: http://www.drm-sender.de/celt_in_drm.pdf Suggestions and comments are welcome! A live on-air DRM+ transmission using CELT (v.0.7.1) for audio encoding was

# make make all-recursive make[1]: Entering directory `/tmp/celt-0.7.0' Making all in libcelt make[2]: Entering directory `/tmp/celt-0.7.0/libcelt' /bin/sh ../libtool --tag=CC --mode=compile gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I.. -s -O3 -march=i686 -fvisibility=hidden -W -Wstrict-prototypes -Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wno-parentheses

Hi, I've try to enable the new loss concealment code with celt-0.6.1. I've run "configure --enable-new-plc" but I've got a missing plc.c file while compiling. It is also missing for version 0.6.0. Can you release this missing file? Thank you, Pascal CRC

Hi everyone, Just wanted to let you know that 0.8.0 is out. You can get it from the usual place and here's the small notes that go with it: "CELT 0.8.0 brings quality improvements for high bit-rates and for transients in general. It also adds the possibility of changing the frame size dynamically, which requires a minor change in the API. At last, the new PLC algorithm from 0.7.1 is

Hi, In case it is of any help, to compile a static library for the iPhone, I had to add the following 2 lines in plc.c file : #include "arch.h" #include "stack_alloc.h" otherwise "celt_word16..." type are not defined and "VARDECL...." also not. Best Regards St?phane Letz

Hi Bob, Would you be willing to send me your test audio file? I've been using an unencubered solution to the problem (since I'm probably going to be distributing my software long before the IPR for the pre/post filter is available) and I'm curious to see how it stacks up against the pre/post filter. Cheers, John Ridges > On Mon, Mar 21, 2011 at 3:06 PM, Bob

I am aware of a couple CELT users running the codec across a bit-error channel where corruption takes the form of flipped bits (such as a raw wireless link) rather than a packet-loss channel (like ethernet or an IP network). CELT has been designed to work reasonably well on both kinds of channel. You can turn a bit-error channel into a packet-loss channel by including a CRC across the entire

Hi all, I am the developer of the llcon software (llcon.sf.net) which is a software making it possible for musicians to play in real-time over the internet. Up to now I have used ADPCM or no audio coding. Gregory Maxwell was pointing me to the great CELT project. Using CELT has the advantage to be able to use higher sample rates, getting lower code rate and better error concealment. I have

Hi, I'm using Celt 0.7.1 in fixed math mode. In the celt_encode function, if the variable has_pitch is true, the function pitch_search is called. Within this function the find_best_pitch subfunction is called. Here the variable "float score;" is defined. Is this right? I was expecting not to see any float declaration in the fixed math code. Is it possible to redefine it as

Hello everyone, I have been having trouble utilizing the PLC function (I think). In older versions (0.7.1) a pointer to NULL did the trick, but with code from the tip of the GIT repository, this method causes the codec to crash on the C55x fixed point platform. I have not determined where the crash occurs. I have also attempted to pass in an array of zero's and this creates an echoey, reverby

Aymeric Moizard a ?crit : >> None of that is defined yet, though I'm open to suggestions on how to do >> the mapping. > > CELT/44100 and CELT/48000 > a=fmtp:105 stereo=on > > probably a latency value? It would definitely need a frame_size value > "CELT" doesn't seems to be used for any other existing audio related > stuff? right? Not yet.

Hi, I was checking complexity modes of CELT 07.1 encoder. If i got it correctly everything is driven by pitch_available variable set in celt_encoder_create function. By default it's set to 1 hence high complexity mode is used all the time. I tried to disable it and although i couldn't hear any particular difference in the decoded audio quality, the cycle count of the encoder dropped

Hi, We are testing CELT 0.7.1 on an iPod touch and it seems we are already reaching the CPU limit of the machine for a 1 channel both directions stream. The CELT README says that the code should be compiled with fixed-point support, but it it not clear how it has to be used later on. We currently use celt_encode_float/celt_decode_float functions. Can we still use them with the fixed point version

Hello, I want to use the CELT codec in an embedded solution. For the embedded solution, the processor speed is of great importance. In the documentation (the presentation of Dr. Jean-Marc Valin, Gregory Maxwell and Dr. Timothy B. Terriberry) the CELT LC (low complexity) mode is mentionned. The LC mode should use half the memory recources and half the MIPS. My question is how to tell the CELT

Diana Cionoiu a ?crit : > Hi Jean-Marc, > > 1. Why CELT versus Speex? There's nearly no overlap between Speex and CELT. CELT is much higher quality, very low latency, and of course, higher bit-rate than Speex. So it really depends on the application. > 2. What's the RTP payload for CELT, so we can add it in Yate? > 3. What are the SDP declaration parameters? None of that

Thanks for the reply. I think I'm beginning to understand but can you clarify a bit more. 1) I am confused on "trade error-free quality" part. Basically the encoder is doing something to the encoded data by looking at the SPEEX_SET_PLC_TUNING parameter? 2) How does the receiver side determine whether the packet loss occured or not? It seems only way is assigning

Hi, I am an engineering student in IIT Guwahati, India. Currently, as a summer project I am working on 'packet loss concealment in voip scenario'. I am eager to know what PLC methods are used at receiver end of speex decoder. And if I could develop some more efficient method I could able to contribute to the speex. Actually, I searched the whole speex manual but failed to find what

Hi Jean-Marc, 1. Why CELT versus Speex? 2. What's the RTP payload for CELT, so we can add it in Yate? 3. What are the SDP declaration parameters? Diana Jean-Marc Valin wrote: > Hi everyone, > > I'm happy to announce CELT version 0.5.0. This release includes > simplifications to the bit allocation code and includes a new > low-complexity mode that can be enabled (without

hi, i'd like to ask for a suggestion for implementing PLC (packet lost concealment). right now, i don't have PLC applied in my application. when voice data arrive from the network, i just play it right away. does having PLC require that you play something every interval? like if im expecting a voice packet say every 20ms, then i play something at that rate. either the packet that came

Hi all, In my setup, I'm using a framesize of 320 samples at a sample rate of 32000 Hz (10 ms frames). This gives me a mode where nbEBands is 21 and eBands[21] is 100 (the standard 2.5 ms short block ebands). This also gives me LM = 2, so what happens is eBands[nbEBands]<<LM is 400, whereas my framesize is only 320. This causes a stack overrun at line 1978 in celt.c in both calls