Lame Q & A -- Talk about the latest encoding parameter setting Scheme

Lame Q & A -- Talk about the latest encoding parameter setting Scheme

Stopgun

1. What is lame? Lame is currently the best MP3 encoding engine. Lame (mitiok. ma. the MP3 audio produced by CX is pure and has a wide space, clear bass, and sound details. Its original audio Model Technology ensures the authenticity of CD audio restoration. It works with VBR and ABR parameters, sound quality is almost comparable to CD audio, but the file size is very small. For a free engine, the advantage of lame is self-evident. 2. What is the VBR and ABR mentioned above? And CBR? VBR (variable bitrate) dynamic bit rate. That is, there is no fixed bit rate. during compression, the compression software determines the bit rate based on the audio data in real time. This is based on the quality of both the file size and the recommended encoding mode; The average bit rate of ABR (average bitrate) is an interpolation parameter of VBR. Lame creates this encoding mode based on the poor file volume ratio of CBR and the variable file size generated by VBR. In the specified file size, the ABR takes every 50 frames (30 frames about 1 second) as a segment, and uses relatively low traffic at low frequency and insensitive frequencies, high traffic is used for high-frequency and high-dynamic performance, which can be used as a compromise between VBR and CBR. CBR (constant bitrate), a constant bit rate, indicates that a file is a bit rate from start to end. Compared with VBR and ABR, the compressed file size is large, and the sound quality is not significantly improved compared with VBR and ABR. 3. How are two formats of lame files in the downloaded compressed package? What are their differences? Which one is better? Lame is divided into two versions: DLL and exe. The dll version can be seen in most rail capture software as a convenient interface program (such as altomp3maker), but due to poor controllability, compared with the EXE version with rich adjustment parameters, the compressed MP3 version is slightly inferior. 4. How is the EXE version a command line running program? Too difficult to use To address this problem, there are some EXE Shell programs, such as razorlame (www.dors.de/razorlame) on the Internet. It is a Win window program that allows us to easily adjust various parameters in the window interface, simplifies the tedious compression process. We can also use eac(currently the best trackable software, www.exactaudiocopy.demo-to call lame.exe, and compress MP3 at the same time to get twice the result with half the effort. 5. I learned how to use the ultimate parameter-V 0-Q 0 on some websites. Now I can press the highest quality MP3 file :) In fact, a parameter such as-V 0-Q 0 can be compressed to the highest quality MP3 is never answered by the lame developer. In lame, a level such as 0 and 1 is a test parameter. If you use it to compress MP3, it will not improve the sound quality (compared with level2), but will import excess noise, therefore, the above parameters should be changed to-V 2-Q 2. In fact, such parameter standards are almost eliminated, and the-AP parameter will gradually become popular as the new lame parameter standard. 6. What are the-AP parameters? I have never heard :( This parameter is a preset parameter. -- ABR 128-h -- nspsytune -- athtype 2 -- lowpass 16 -- NS-bass-8 -- scale 0.93, will you feel dizzy in the face of the above set of fine-tuning parameters @_@...... To simplify parameter settings and avoid unnecessary test parameters, the lame developer has carefully configured the-AP parameter, it is a set of Code-level parameters (that is, the same functions can be implemented without fine-tuning parameters ). With this new preset parameter standard, you can compress high-quality MP3 files and avoid getting into the maze of fine-tuning parameters. The following is the-AP parameter list: Highest quality parameters: -- Alt-preset insane or -- alt-preset CBR 320 320 k CBR, best sound quality, maximum file size VBR parameters: 1. -- alt-preset extreme VBR of about 25% kb. The sound quality is similar to the above parameter, but the file size is small. We recommend this parameter. 2. -- alt-preset fast extreme Sound quality is slightly worse than the above parameters 3. -- alt-preset Standard VBR of-K can balance the sound quality and file size. 4. -- alt-preset fast Standard Sound quality is slightly worse than the above parameters 5. -- alt-preset standard-y Although the quality is slightly poor, but the file size is very small ABR parameters: -- Alt-preset <bitrate> (Available bitrate: 80, 96, 112, 128, 160, 192, 224, 256, 320) CBR parameters: -- Alt-preset CBR <bitrate> (Available bitrate: 80, 96, 112, 128, 160, 192, 224, 256, 320)