When I increase the default Perceptual entropy from 700 all the way upto 3000 I see no improvement in quality.
Hi, To see the change in the quality, change the mode to either VBR or ABR, Since the bit allocation in the quantization depends on two conditions, one is the PE and other is the bitrate. That is the reason why you don't get any difference in quality when operating in CBR mode. Bye With Rgds Chetan K. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, January 23, 2004 7:30 AM To: [EMAIL PROTECTED] Subject: mp3encoder Digest, Vol 8, Issue 15 Send mp3encoder mailing list submissions to [EMAIL PROTECTED] To subscribe or unsubscribe via the World Wide Web, visit http://minnie.tuhs.org/mailman/listinfo/mp3encoder or, via email, send a message with subject or body 'help' to [EMAIL PROTECTED] You can reach the person managing the list at [EMAIL PROTECTED] When replying, please edit your Subject line so it is more specific than "Re: Contents of mp3encoder digest..." Today's Topics: 1. Effect of perceptual entropy on quality (Manjunath D N) 2. Re: Effect of perceptual entropy on quality (Gabriel Bouvigne) ---------------------------------------------------------------------- Message: 1 Date: Thu, 22 Jan 2004 11:05:54 +0530 From: Manjunath D N <[EMAIL PROTECTED]> Subject: [mp3encoder] Effect of perceptual entropy on quality To: [EMAIL PROTECTED] Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=us-ascii HI I was experimenting with the lame encoder in order to assess the effect of perceptual entropy on quality( I am measuring quality using EAQUAL tool which gives objective Difference grade) The encoding parameters were as follows: Mode : Stereo Sampling Rate: 44100 Hz Bit rate : 128 kbps Psychomodel : Off Noise shaping: On Block types: All long Reservoir is not enabled When I increase the default Perceptual entropy from 700 all the way upto 3000 I see no improvement in quality. I thought that the Bit allocation module would allocate more bits to each frame if I increase the PE( even though this may not be the smart thing to do since all frames do not have same complexity) Could anybody explain this strange behaviour ..I mean I always thiught more bits mean better quality Thanks and regards, Manjunath -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, January 22, 2004 7:30 AM To: [EMAIL PROTECTED] Subject: mp3encoder Digest, Vol 8, Issue 14 Send mp3encoder mailing list submissions to [EMAIL PROTECTED] To subscribe or unsubscribe via the World Wide Web, visit http://minnie.tuhs.org/mailman/listinfo/mp3encoder or, via email, send a message with subject or body 'help' to [EMAIL PROTECTED] You can reach the person managing the list at [EMAIL PROTECTED] When replying, please edit your Subject line so it is more specific than "Re: Contents of mp3encoder digest..." Today's Topics: 1. (Allan Ruiters) ---------------------------------------------------------------------- Message: 1 Date: Wed, 21 Jan 2004 14:35:15 +0200 From: Allan Ruiters <[EMAIL PROTECTED]> Subject: [mp3encoder] To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain ********************************************************************** This email and its contents are subject to an email legal notice that can be viewed at: http://www.naspers.com/email/disclaimer.html. Should you be unable to access the link provided, please contact us for a copy at (021) 406 4444 or email [EMAIL PROTECTED] Hierdie epos en die inhoud daarvan is onderworpe aan 'n e-pos geregtelike kennisgewing wat gelees kan word by: http://www.naspers.com/epos/vrywaring.html. Indien jy nie toegang tot die verskafte skakel kan kry nie kontak ons vir 'n afskrif by (021) 406 4444 of epos [EMAIL PROTECTED] ********************************************************************** ------------------------------ _______________________________________________ mp3encoder mailing list [EMAIL PROTECTED] http://minnie.tuhs.org/mailman/listinfo/mp3encoder End of mp3encoder Digest, Vol 8, Issue 14 ***************************************** ------------------------------ Message: 2 Date: Thu, 22 Jan 2004 08:54:05 +0100 From: Gabriel Bouvigne <[EMAIL PROTECTED]> Subject: Re: [mp3encoder] Effect of perceptual entropy on quality To: MP3 encoders development list <[EMAIL PROTECTED]> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=us-ascii; format=flowed Manjunath D N wrote: > Bit rate : 128 kbps > When I increase the default Perceptual entropy from 700 all the way upto > 3000 I see no improvement in quality. I thought that the Bit allocation > module would allocate more bits to each frame if I increase the PE( If your are using a 128kbps fixed bitrate, how would increasing the default PE increase the number of allocated bits. The allocated bits are constrained by the bitrate when using cbr. Regards, -- Gabriel Bouvigne www.mp3-tech.org personal page: http://gabriel.mp3-tech.org ------------------------------ _______________________________________________ mp3encoder mailing list [EMAIL PROTECTED] http://minnie.tuhs.org/mailman/listinfo/mp3encoder End of mp3encoder Digest, Vol 8, Issue 15 ***************************************** _______________________________________________ mp3encoder mailing list [EMAIL PROTECTED] http://minnie.tuhs.org/mailman/listinfo/mp3encoder
