datthro@daimi.dk (Thomas Rohde) (01/11/90)
Hi! I'm in the process of writing a master thesis on Speech Recognition, and the NeXT seems ideal for this purpose. We've just acquired a NeXT, and are trying it's capabilities. It's essential for this project, that spectrum analysis can be done effectively, so that recognition can be done in real time. On the NeXT I've found some assembler files for doing FFT (We are really interested in getting the Cepstrum Coefficients) on the DSP chip. We are, however, not asm. experts. Are there anyone out there who have done any work on this? We would like a piece of code, which will take a CODEC snd-file, down-load it to the DSP chip, perform FFT analysis, and make the output available for further analysis. Thanks, Thomas Rohde (datthro@daimi.dk)
clement@opus.cs.mcgill.ca (Clement Pellerin) (01/12/90)
In article <4686@daimi.dk> datthro@daimi.dk (Thomas Rohde) writes: > I'm in the process of writing a master thesis on Speech Recognition, >and the NeXT seems ideal for this purpose. We've just acquired a NeXT, >and are trying it's capabilities. It's essential for this project, >that spectrum analysis can be done effectively, so that recognition >can be done in real time. On the NeXT I've found some assembler files >for doing FFT (We are really interested in getting the Cepstrum Coefficients) >on the DSP chip. We are, however, not asm. experts. Are there anyone >out there who have done any work on this? We would like a piece of code, >which will take a CODEC snd-file, down-load it to the DSP chip, perform >FFT analysis, and make the output available for further analysis. I have learned the 56001 assembler as an exercise in microprocessor architecture. I don't know the basics of signal processing but here are two pointers: You can program your code in C for the 56001 with the help of the C compiler from Motorola (DSP56KCCx, call Motorola for $$) You can call Motorola's bulletin board. It's called Dr. BuB You can reach it at (512) 891-DSP1 (212A 300/1200 baud) (512) 891-DSP2 (V.22 1200 baud) (512) 891-DSP3 (v.22bis 2400 baud) 7 even 1 stop User ID=guest You will find lots of assembler files solving classical DSP problems. (I have never called, I don't know how good it is) I found this information in the book: DSP56000/DSP56001 Digital Signal Processor User's Manual. (Appendix C Additional Support) You can order a copy at the closest Motorola branch. Clement Pellerin, McGill University, Montreal, Canada clement@opus.cs.mcgill.ca -- news <clement