Hi all, do u know which is the best MP3 encoder, i mean LAME, Thomson or Fraunhofer??? How is the testing of MP3 encoder carried out since no standard test vectors are available??? what are the songs or teststreams that are generally used for MP3 encoder testing???? Can somebody send me those or the URLs of those streams???? What are the modules that has to be tested thoroughly ??? Since there are no standard test vectors available for MP3 encoder, how do we say that the MP3 encoder developed by someone is full proof?? Thanks in advance regards akash.
Mp3 encoder
Started by ●October 8, 2003
Reply by ●October 8, 20032003-10-08
Hi Akash, 1. I don't know about Thomson, but among Fraunhofer & LAME, LAME is much better & is updated continuously. 2. No standard test cases are defined for verification of the encoder, because it is difficult to define few test case that can cover variety of audio source signals. Hence Encoder standards are only informative, to allow continuous improvement. 3. Regarding the modules that are to be tested thoroughly, psycho acoustic model & quantization module are more critical & they make the difference between different MP3 Encoders in terms of quality, bit rate and MIPS. Even though other modules are also critical, you can define few number of test cases, to verify their functionality. But, the functionality of psycho acoustic model & quantizer can be defined only qualitatively (bit rate & quality they finally result in). Hence there is no specific test case(s) to verify their functionality. I don't have any URL link for some difficult test cases right now, but http://www.mp3-tech.org/ may be useful. Regards, Sarat -----Original Message----- From: akash damodar sureka [mailto:akashsureka@akas...] Sent: Wednesday, October 08, 2003 3:50 PM To: audiodsp@audi... Subject: [audiodsp] Mp3 encoder Hi all, do u know which is the best MP3 encoder, i mean LAME, Thomson or Fraunhofer??? How is the testing of MP3 encoder carried out since no standard test vectors are available??? what are the songs or teststreams that are generally used for MP3 encoder testing???? Can somebody send me those or the URLs of those streams???? What are the modules that has to be tested thoroughly ??? Since there are no standard test vectors available for MP3 encoder, how do we say that the MP3 encoder developed by someone is full proof?? Thanks in advance regards akash. _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: audiodsp-subscribe@audi... To Post: audiodsp@audi... To Leave: audiodsp-unsubscribe@audi... Archives: http://groups.yahoo.com/group/audiodsp Other DSP-Related Groups: http://www.dsprelated.com ">http://docs.yahoo.com/info/terms/