Mobility Site - View Single Post - .AVI, IV 32 & MPEG-4 Trouble Playing

stevenator65 · 02-24-06, 11:33 AM

I used fairuse to make some dvds for my ax but it wouldn't play ac3 sound. So if I download the codecs it'll work?

Edit: And the answer is...Yes! Thanks everybody. Now, what's the difference b/t Ac3 and mp3 128? Is one a better recording than the other?

Here's the answer:

MP3
MP3 is an acronym for MPEG-1 (or MPEG-2) Layer 3 audio encoding (it is not an acronym for MPEG3). MP3 is a popular compression format used for audio files on computers and portable devices.

The compression in MP3 works on the basis of a "psychoacoustic model" which means that parts of the audio that human ears cannot detect are discarded by the encoder. Although this is a LOSSY process, it can yield very high quality audio files are relatively high compression rates.

A typical MP3 file encoded at 128 kbit/s (12:1 compression) is near CD quality.

MP3 audio is increasingly being used in video production coupled with various MPEG-4 video codecs like divx. The audio may be encoded with a constant or variable bitrate.

AC3
Dolby Digital
Dolby's best-known digital system, is used to provide multichannel surround sound in cinemas from 35 mm film, and in the home from laser discs, DVDs, and digital broadcast television, cable, and satellite systems. It enables the transmission and storage of up to five full-range audio channels, plus a low-frequency effects channel (LFE), in less space than is required for just one linear PCM-coded channel on a compact disc. Dolby.

My question is how much better does one sound versus the space it takes up? I imagine AC3 is supposed to sound better and probably doesn't take up much more room on a cf card. Any opinions?

02-24-06, 11:33 AM	#5 (permalink)
stevenator65 Aximsite Hall of Fame Addicted Member Join Date: Apr 2005 Posts: 6,323 Thanked 0 Times in 0 Posts	I used fairuse to make some dvds for my ax but it wouldn't play ac3 sound. So if I download the codecs it'll work? Edit: And the answer is...Yes! Thanks everybody. Now, what's the difference b/t Ac3 and mp3 128? Is one a better recording than the other? Here's the answer: MP3 MP3 is an acronym for MPEG-1 (or MPEG-2) Layer 3 audio encoding (it is not an acronym for MPEG3). MP3 is a popular compression format used for audio files on computers and portable devices. The compression in MP3 works on the basis of a "psychoacoustic model" which means that parts of the audio that human ears cannot detect are discarded by the encoder. Although this is a LOSSY process, it can yield very high quality audio files are relatively high compression rates. A typical MP3 file encoded at 128 kbit/s (12:1 compression) is near CD quality. MP3 audio is increasingly being used in video production coupled with various MPEG-4 video codecs like divx. The audio may be encoded with a constant or variable bitrate. AC3 Dolby Digital Dolby's best-known digital system, is used to provide multichannel surround sound in cinemas from 35 mm film, and in the home from laser discs, DVDs, and digital broadcast television, cable, and satellite systems. It enables the transmission and storage of up to five full-range audio channels, plus a low-frequency effects channel (LFE), in less space than is required for just one linear PCM-coded channel on a compact disc. Dolby. My question is how much better does one sound versus the space it takes up? I imagine AC3 is supposed to sound better and probably doesn't take up much more room on a cf card. Any opinions? Last edited by stevenator65; 02-24-06 at 12:07 PM.