search for: lpc2138

Hi, I am trying to implement Speex in freeRtos on LPC2138 (ARM7 core), to record about 10sec of voice. I like to compress the data by using Speex, because of the limitation of RAM (32KB). I have read that the speex encoder and decoder need less than 6KB RAM. "The fixed-point narrowband encoder+decoder memory use has been cut by more than half, makin...

...pplication). Version for ARM v5E (STR9) is faster for about of 25% for comparable processor's frequencies, by using of DSP commands. Version for ARM v4 (STR7, LPC21XX/23XX/28XX) can work even on 60 MHz. (but not all speex modes. Just 6,8,15). Here is Measurements of performance for LPC2138 - 60 MHz. 4000 kbit/sec (quality = 1) Encoder - 17.9 msec/frame 59% Decoder - 0.97 msec/frame 3% 6000 kbit/sec (quality = 2) Encoder - 13.5 msec/frame 43% Decoder - 1.11 msec/frame 3.8% 8000 kbit/sec (quality = 3) Encoder - 15.07 msec/frame 47% Decoder - 1.14 msec/frame...

I am using speex on a Philips LPC2138 Arm 7 processor and have hit two compiler warnings when using FIXED_POINT and the Arm 4 asm code. In cb_search.c get a warning on the call to compute_weighted_codebook of: "passing arg 2 of 'compute_weighted_codebook' from incompatible pointer type' In cp_search_arm4.h it is def...

On Mon, 2006-01-23 at 10:15 -0500, tom abcd wrote: > I am using speex on a Philips LPC2138 Arm 7 processor and have hit two > compiler warnings when using FIXED_POINT and the Arm 4 asm code. > > In cb_search.c get a warning on the call to compute_weighted_codebook of: > "passing arg 2 of 'compute_weighted_codebook' from incompatible pointer type' OK, I forg...

...l Message----- From: tom abcd [mailto:tom.abcd@gmail.com] Sent: 28 March 2006 16:34 To: Anderton, John Cc: speex-dev@xiph.org Subject: Re: [Speex-dev] ARM7 decode resource requirements John I am have just started with Speex and ARM but I have been able to get it to Decode wideband on a Philips LPC2138 (60 MHz) board using about 100k coded space, 20k ram (had to change a few constants to get the memory down to this) and about half the performance (takes about 10ms to decode 20ms of speech). I have been told there is some floating point in the wideband (from Jean-Marc) but since it runs for me h...

Hi all I'm looking in to using speex for an ARM7 based speech decode development (note we need the decode only). My hope is that we should be able to run the decoder (in wideband mode) real time on the ARM7 (40MHz) without any problems (the difficulty would be in the encode - but we plan to run that offline on a PC - so we should be OK). Can anyone confirm that this is the case please? Also