similar to: Need For Help about audio data compression

Hi All, ?? I am a new member to the vorbis-dev mailing list. i hope that u receive the help that i've been searching for. I need to compress audio samples captured by wireless sensor node (16-bit PCM at 8Khz). can i use vorbis i such an embedded system environment that has the following HW/SW specifications: -416 MHz Microprocessor(ARM architecture, Intel Xscale family) -32 MB RAM Beside

Hi Mashal, 2012/3/14 Mashal al-shboul <shboul8989 at yahoo.com>: > Hi Blaise Potard, > Thank you for help. > Actually,i am sure that my samples are unsigned? , specifically, of type > uint16_t which is unsigned 2-bytes, these samples are provided by an audio > driver for an audio subsystem (microphone ADC...) in a wireless sensor > node(intelmote2 ), following is the

Thanks a lot for replying, The question now is , after subtracting 32767 from each unsigned sample, will the new signed samples represent the same original voice ? ???? For explanation, assume "Hi" is said in 8000 unsigned sample ,if i subtract 32767 from each sample and play the resulting 8000 sample as signed PCM samples,will they be "Hi" ?! Forgive me about my questions ,

Thanks for replying. actually 2^15 in decimal is the same as 0x8000 in hex. the idea is clear for me that i should scale down each unsigned sample by 0x8000 for becoming signed. I hope that will work correctly as input raw samples to Speex codec. do you think so ? Regards, Mash'al ________________________________ From: Steve Checkoway <s at pahtak.org> To: Mashal al-shboul

I don't understand why you're subtracting 2^15 - 1. Assuming you really do have unsigned samples (which is very odd) that have 0x8000 as the mid point of the range, then you need to subtract 0x8000, as I believe I pointed out already. By mid point, I mean if you have a pure tone (i.e., a sine wave) that has unsigned range 0 to 0xffff, then the mid point is 0x8000. The mid point should be

Thanks for the reply, i added (LDFLAGS += -L/usr/local/lib -lspeex -lm) to Makefilebut the error is still appearing ! /tmp/ccDFH8gi.o(.text+0x179c): In function `main': : undefined reference to `BlinkC$speex_bits_init' collect2: ld returned 1 exit status make: *** [exe0] Error 1 i am trying to guess what is missed to correctly link to the lib .Do you have suggestions? Regards,

Thanks for your appreciated help. i found casting fromunsigned short to short gives different value: unsigned short FFFF=65535 where short FFFF= -1. however, can i configure speex codec (specifically speex_encode_int function) to take input of type unsigned short instead of short so that i avoid casting errors ? Regards, Mashal ________________________________ From: Yanick Bourbeau

Hi all speex developers, ??? I have encoded 10 seconds buffer of Mic voice (raw) using speex on an embedded device, then transmitted it to a PC where i decoded the voice,in a way similar to the sampleenc.c and sampledec.c on website, ?BUT my problem is that the decoded voice is totally different from the original,what i hear is just noise !! what is possible to be the reason ? Any help is

Hi All, ?? I am a new member to the speex-dev mailing list. i hope that u receive the help that i've been searching for. I need to compress audio samples captured by wireless sensor node (16-bit PCM at 8Khz). can i use speex for such an embedded system environment that has the following HW/SW specifications: -416 MHz Microprocessor(ARM architecture, Intel Xscale family) -32 MB RAM Beside

Hi All, i need your help in determining the problem in the following sample code (taken from speex manual) for fixed point encoding. i tested encoding a 160 sample frame and then decoding it back But The problem is that the decoded frame is totally different from the original frame(see output below).What is the possible reason for this?.thanks for any help #include<stdio.h>

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Hi, Discard this request , I was investigating on the wrong compute node. It works fine. Sorry for incovenience. Regards, J.P. De : Jean-Pierre Ribeauville Envoyé : mercredi 20 janvier 2016 16:18 À : 'libvirt-users@redhat.com' Objet : channel device "state" value missing within OpenStack Kilo version Hi, I've installed a OpenStack KILO all-in-one . For private

Hi, I've installed a OpenStack KILO all-in-one . For private need , I've to add a channel device to all my GUESTS on my compute node. It works fine (e.g. via a virsh command). Problem is that , in the xml describing the Guest , this 'state' value : <target type='virtio' name='agent' state='disconnected'/> showing if the channel is connected

This may expose my ignorance, but here goes :) I've been asked to figure out how much bandwidth would be needed to handle 1,000,000 minutes a month. Here's the environment: ) All calls are received via SIP. ) All calls use the ulaw codec. ) Calls average 10 minutes in duration. ) The "busiest" hour will account for 10% of the daily total. This is how I'm figuring

I've a question about the bandwidth consumed by IAX2/GSM. According to the wiki page, the GSM codec should run about 13 kilo-bits/sec for a voice encoding. However, watching gkrellm when I initiate a call to Digium, it looks like the channel is taking a consistent 5-6 kilo-bytes/sec. That's a lot more bandwidth than it should take. Is there perhaps a setting I have wrong somethere in

--- Jim Crichton <jim.crichton@comcast.net> wrote: > >> > Sorry if this a repost but I want to create the > >> > smallest Speex library possible to be put in > TI's > >> > TMS320 DSP. I'm only interested in one > >> configuration: > >> > 5.97 Kbps narrowband. What part of source code > >> can I > >> >

> Sorry if this a repost but I want to create the > smallest Speex library possible to be put in TI's > TMS320 DSP. I'm only interested in one configuration: > 5.97 Kbps narrowband. What part of source code can I > remove? Currently, when I compiled the version 1.1.12 > libspeex.a library with the TI TMS320 and > Fixed-Integer options, I get around 522Kb. You mean

>>>> I've heard lots of discussion about it, >>>> but what I was taught in school was kilo >>>> was greek for 1000. In most usages "kilo XXX" >>>> means "1000 of XXX". This is correct, but... >>>> In electronics terms >>>> I understand we use it collectively wrong >>>> from a linguistic

>> > Sorry if this a repost but I want to create the >> > smallest Speex library possible to be put in TI's >> > TMS320 DSP. I'm only interested in one >> configuration: >> > 5.97 Kbps narrowband. What part of source code >> can I >> > remove? Currently, when I compiled the version >> 1.1.12 >> > libspeex.a library