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Discussion Groups | Analog Devices DSPs | Alternative AD/DA chip for ADSP-2189M?
Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).
Alternative AD/DA chip for ADSP-2189M? - tylu - Jan 15 6:43:00 2004
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Hi all, I was using AD73322 which came with EZ-Kit to do my project. Now I need more channels (maybe 4DA & 4AD). And AD73322 sometimes got mixed up the signals from both channels. I heard that there are other chips that use IDMA to transfer data with more channels. Does anyone have any experience doing something like that? Thanks for any comments! tylu |
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Re: Alternative AD/DA chip for ADSP-2189M? - Al Clark - Jan 15 15:15:00 2004
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At 12:43 AM 1/15/2004, tylu wrote: >Hi all, >I was using AD73322 which came with EZ-Kit to do my project. Now I >need more channels (maybe 4DA & 4AD). And AD73322 sometimes got mixed >up the signals from both channels. I heard that there are other chips >that use IDMA to transfer data with more channels. Does anyone have >any experience doing something like that? >Thanks for any comments! > >tylu We will be releasing a 4 channel dspstak I/O module next month that uses either Wolfson WM8731 or TI TLV320AIC23 codecs. It can sample up to 96k with significantly better performance than the AD73322. Although it is designed to interface directly to our dspstak modules, you could adapt it to an EZ-Kit. It would use both SPORTs on a 218x or 219x or one SPORT using I2S on a Sharc 21161 or 21262 Al Clark Danville Signal Processing, Inc. -------------------------------------------------------------------- Purveyors of Fine DSP Hardware and other Cool Stuff Available at http://www.danvillesignal.com |
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A-Law Mu-Law Compression on 2186m - ayyam perumal - Jan 16 8:33:00 2004
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hi all, i have to change 16-bit data to 8-bit data.For that i am trying to apply either A-Law or Mu-Law compression algorithm.i got a sample code from ADI but it's not working fine.anybody kindly do help in this regrds.. thanks in advance... with good regards ayyams ________________________________________________________________________ Yahoo! India Mobile: Download the latest polyphonic ringtones. Go to http://in.mobile.yahoo.com |
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RE: Alternative AD/DA chip for ADSP-2189M? - Dave Tiefenbrunn - Jan 16 14:48:00 2004
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tylu wrote: >I was using AD73322 which came with EZ-Kit to do my project. [snip] > And AD73322 sometimes got mixed up the signals from both channels. I had this problem with the EZ-KIT and the EZ-ICE also. I now have my program in ROM on my own PCB. I set up an automated test to boot and verify that the channels came up correctly. It ran better than 20,000 boots with no errors. The channel swapping must have something to do with the emulator and whatever is on the EZ-KIT. Dave David Tiefenbrunn N1WWY Essential Telecommunications Corp. - http://www.essentialtel.com David Tiefenbrunn - http://users.abac.com/dandatief |
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Re: A-Law Mu-Law Compression on 2186m - duhlynn - Jan 16 17:20:00 2004
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What kind of algorithm are you using direct encoding/encoding, linear code conversion, or look up table? --- In , ayyam perumal <ayyams76@y...> wrote: > hi all, > > i have to change 16-bit data to 8-bit > data.For that i am trying to apply either A-Law or > Mu-Law compression algorithm.i got a sample code from > ADI but it's not working fine.anybody kindly do help > in this regrds.. > > thanks in advance... > > with good regards > ayyams > ________________________________________________________________________ > Yahoo! India Mobile: Download the latest polyphonic ringtones. > Go to http://in.mobile.yahoo.com |
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Re: A-Law Mu-Law Compression on 2186m - ayyam perumal - Jan 30 3:29:00 2004
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hi all, finally i got the result.....what is the problem is on that program the maximum PCM value is set to 8092(1fff)..but i am looking for 16-bit...i just before compression convert 16-bit to 14-bit(scalling) and after decompression again i convert 14-bit in to 16-bit(descalling). here with i am saying my heartly thanks to all who helped me to overcome this problem..... with good regards ayyams ________________________________________________________________________ Yahoo! India Mobile: Download the latest polyphonic ringtones. Go to http://in.mobile.yahoo.com |
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