最後更新: 2021-04-09

介紹

Extension: .wv

Compression Mode

• lossless mode(compression ratio:  30% ~ 70%)
• hybrid compression mode ( lossy file + "correction" file)

HomePage: https://www.wavpack.com/

功能:

• Support: up to 32-bit integer/float PCM;
• Support: DSD
• Assembly language optimizations for x86, x64, and ARM
• Instantly seekable and streaming capable
• ReplayGain
• Uses ID3v1
• MD5 audio checksums for verification

CLI OPTS

"high" mode (-h)

this will increase both the packing and unpacking time by about 50%

For the best lossless compression WavPack can offer, use -hhx6

the -x switch works well with these two modes(high, fast)

-hh = very high quality

This option slows both by about a factor of about 2,

and is not recommended for use on portable devices

because of the high CPU load required for decoding.

-x

extra encode processing (optional n = 1-6, 1 = default)

Because the standard compression parameters are optimized for "normal" CD music audio,

this option works best with "non-standard" audio

DSD

每一次取樣會比對本次取樣和上一個樣本值的變動, 接下來使用0和1來記錄振幅的變化

0代表比上一個訊號值來得低, 1代表比上一個訊號值來格高

所以每一個取樣的訊號是和前一個訊號的相對值

DSD藉由非常高的取樣頻率, 將以往量化不精準所造成的失真, 下降到一個位元以內的誤差