Audio signal processor

摘要: NTSC signals have a frame rate of 29.97 frames per second. In SDI, audio data is sampled at 30n where n an integer, e.g. 48K samples Thus there are 1601.6 frame. Although integer number 8008 five sequence, two 1601 and 3 1602 samples. This creates variable storage requirements from to causes problems in editing. The SDI separated associated video decimated by factor h, h=4 for example signal processor 2, 3, 4, 5 6. written into FIFO circuit the 30n/h synchronously with timing under control reference generator 10, 9. A fixed n/h 7 each write 8. n/h=400 example, n=1600 h=4. Any additional sample dropped. 400 stored on disc 14. If it desired reproduce samples, they 12. read 13 reads out rate. three out: 401 out.