|
|
发表于 2008-9-9 11:28:05
|
显示全部楼层
【2楼】 dyt88
不知道你的MP3板是什么样子？好像UC3出来的时间不长吧？可能是优化没做好？
这个方案已经被美国的通用汽车所采用，可以支持IPOD的数据流播放，还有电容触摸按键。应该是非常不错的。
以下是解码能力的描述
MP3
MPEG-1 Audio Layer 3, more commonly referred to as MP3, is a digital audio encoding format
using a form of lossy data compression. Several bit rates are specified in the MPEG-1 Layer 3
standard: 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256 and 320 Kbit/s, and the available
sampling frequencies are 32, 44.1 and 48 KHz. A sample rate of 44.1 KHz is almost always
used. 128 Kbit/s bitrate files are slowly being replaced with higher bitrates like 192 Kbit/s, with
some being encoded up to MP3's maximum of 320 Kbit/s.
A tag in a compressed audio file is a section of the file that contains metadata such as the title,
artist, album, track number or other information about the file's contents.
The chosen MP3 decoder here is MAD (libmad), a high-quality MPEG audio decoder. It currently
supports MPEG-1 and the MPEG-2 extension to Lower Sampling Frequencies, as well as the
so-called MPEG 2.5 format. All three audio layers (Layer I, Layer II, and Layer III a.k.a. MP3) are
fully implemented. MAD does not yet support MPEG-2 multichannel audio (although it should be
backward compatible with such streams). |
|
楼主
