search for: iir_mem16

-----Original Message----- From: Jean-Marc Valin <jean-marc.valin at usherbrooke.ca> To: ??????? ??????? <altersoft at mail.ru> Date: Sat, 02 Aug 2008 07:54:34 -0400 Subject: Re: [Speex-dev] fir_mem16,iir_mem16 and filter_mem16 optimisations > > ??????? ??????? a ?crit : > > I have some questions about that functions: fir_mem16, iir_mem16 and filter_mem16. > > Filtering is very slow on TI DSP, and i want to optimise it. > > Can somebody give me formulas which discribe work of th...

Hi! I have some questions about that functions: fir_mem16, iir_mem16 and filter_mem16. Filtering is very slow on TI DSP, and i want to optimise it. Can somebody give me formulas which discribe work of this filters? Or any suggestions about how to transform code for better performance. I going to implement this functions in assembler, but it is hard to do without f...

Dear Sirs, I would be interested to hear your views on whether SPEEX could be made to run fast on a DSPIC33 by the following strategy: Make iir_mem16() (for example) purely 16 bit by restricting the number of bits in the signal to say 10 using SATURATE and then making the LPC co-efficients just 6 bits. At present (with standard code) the encode function is taking about 140ms which is seven times too long ! Any thoughts welcome ? Best wishes...

Hi all, I've taken preglows ARM versions of qmf_synth and iir_mem16 from rockboxes speex codec, and tweaked them a bit further for some more speed. I attach them here so you can review and take on any changes you want. Please let me know if you have questions etc. Thanks, Robin -- Robin Watts, Email: <mailto:Robin.Watts@wss.co.uk> Warm Silenc...

...in quality) > 2) Have you enabled the current ARM4 assembly bits? > 3) There are a couple functions that could definitely benefit from > assembly optimisations. They used to be optimised for AMR4, but I had to > remove that when I optimised the C version. Those are filter_mem16(), > iir_mem16() and fir_mem16(). Let me know if you're going to do that > because the best way to do it is not to start from the current C code. > Yes, I have enabled the the current ARM4 assembly bits. I have tried to optimize these functions(filter_mem16(),iir_mem16() and fir_mem16()) in C code, but...

Hi, all, I am porting speex on ARM7TDMI, I have done some optimization, the result is that the encoder and decoder need about 60 MCPS for 5.96kbps bitrate and complexity 0. Can someone give me informtion about Speex optimization on ARM7? Another question, my ADC and DAC are 12 bits, but Speex codec is 16bits, Did someone try to modify speex to 12 bits? I think if I modify speex to 12 bits, the

Jean-Marc Valin wrote on 8/20/2007 3:48 PM: > Hi Oleg, > > Turns out the problem was only triggered with DTX on. I just committed a > fix in svn/git. Let me know if it works for you now. > > Thanks again for reporting the bug. > > Jean-Marc > Thank you, problem is gone now! Oleg PS. I just finished math_approx.asm (speed optimized version for ARM). The code can be

...SP compiler): 1. I got a pretty good boost by using a scratch buffer in SRAM. 2. Wideband Encode+Decode takes 79.1 + 7.2 MIPS on my BF536 400/133 Mhz 3. Profiler says: vq_nbest 33.05% vq_nbest_sign 11.12% filter_mem16 4.14% inner_prod 4.07% iir_mem16 2.75% qmf_synth 2.32% lsp_to_lpc 2.32% open_loop_nbest_pitch 1.41% compute_impulse_response 1.37% qmf_decomp 1.28% lpc_to_lsp 1.26% fir_mem16 1.16% speex_bits_pack 1.07% speex_bits_u...

...al and there's a cost in quality) 2) Have you enabled the current ARM4 assembly bits? 3) There are a couple functions that could definitely benefit from assembly optimisations. They used to be optimised for AMR4, but I had to remove that when I optimised the C version. Those are filter_mem16(), iir_mem16() and fir_mem16(). Let me know if you're going to do that because the best way to do it is not to start from the current C code. > Another question, my ADC and DAC are 12 bits, but Speex codec is > 16bits, Did someone try to modify speex to 12 bits? I think if I > modify speex to 12 b...

> Yes, I have enabled the the current ARM4 assembly bits. I have tried > to optimize these functions(filter_mem16(),iir_mem16() and > fir_mem16()) in C code, but the effect is very small, and I am going > to do assembly optimization for these functions. Do you have another C > code about these functions for assembly optimisations? Can you give me > some information and suggestions? Basically, if either of the...

...quot;, "P0", "P1", "P2", "P3", "P4", "B0", "I0", "I2", "L0", "L2", "M0", "memory", + "ASTAT" BFIN_HWLOOP0_REGS BFIN_HWLOOP1_REGS ); } @@ -345,7 +348,8 @@ void iir_mem16(const spx_word16_t *_x, const spx_coef_t *den, spx_word16_t *_y, "LOOP_END mem_update%=;\n\t" "L1 = 0;\n\t" : : "m" (yy), "m" (_x), "m" (_y), "m" (den), "m" (N), "m" (ord), "m" (mem) - : "A0...

...e -R high_lsp_cdbk -R high_lsp_cdbk2 -R lag_window -R lpc_window -R shift_filt -R vbr_hb_thresh -R vbr_nb_thresh -R vbr_uhb_thresh -T bw_lpc -T compute_impulse_response -T compute_rms -T compute_rms16 -T filter_mem16 T _fini -T fir_mem16 -T forced_pitch_quant -T forced_pitch_unquant -T highpass -T iir_mem16 T _init -T inner_prod -T interp_pitch -T lpc_to_lsp -T lsp_enforce_margin -T lsp_interpolate -T lsp_quant_high -T lsp_quant_lbr -T lsp_quant_nb -T lsp_to_lpc -T lsp_unquant_high -T lsp_unquant_lbr -T lsp_unquant_nb -T multicomb -T nb_decode -T nb_decoder_ctl -T nb_decoder_destroy -T nb_decoder_ini...

...e -R high_lsp_cdbk -R high_lsp_cdbk2 -R lag_window -R lpc_window -R shift_filt -R vbr_hb_thresh -R vbr_nb_thresh -R vbr_uhb_thresh -T bw_lpc -T compute_impulse_response -T compute_rms -T compute_rms16 -T filter_mem16 T _fini -T fir_mem16 -T forced_pitch_quant -T forced_pitch_unquant -T highpass -T iir_mem16 T _init -T inner_prod -T interp_pitch -T lpc_to_lsp -T lsp_enforce_margin -T lsp_interpolate -T lsp_quant_high -T lsp_quant_lbr -T lsp_quant_nb -T lsp_to_lpc -T lsp_unquant_high -T lsp_unquant_lbr -T lsp_unquant_nb -T multicomb -T nb_decode -T nb_decoder_ctl -T nb_decoder_destroy -T nb_decoder_ini...