Author: cmcq Date: Mon Aug 10 10:10:05 2009 New Revision: 5023 Log: Add description of tests
Modified: amr/amrnbdec.c Modified: amr/amrnbdec.c ============================================================================== --- amr/amrnbdec.c Mon Aug 10 09:48:47 2009 (r5022) +++ amr/amrnbdec.c Mon Aug 10 10:10:05 2009 (r5023) @@ -24,6 +24,18 @@ /** * @file libavcodec/amrnbdec.c * AMR narrowband decoder + * + * This decoder uses floats for simplicity and so is not bit-exact. One + * difference is that differences in phase can accumulate. The test sequences + * in 3GPP TS 26.074 can still be useful. + * + * - Comparing this file's output to the output of the ref decoder gives a + * PSNR of 30 to 80. Plotting the output samples shows a difference in + * phase in some areas. + * + * - Comparing both decoders against their input, this decoder gives a similar + * PSNR. If the test sequence homing frames are removed (this decoder does + * not detect them), the PSNR is better on at least 50% of the tests. */ _______________________________________________ FFmpeg-soc mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-soc
