SRLA

aka Soleil Rising Lossless Audio codec

How to build

Requirement

• CMake >= 3.15

Build SRLA Codec

git clone https://github.com/aikiriao/SRLA.git
cd SRLA/tools/srla_codec
cmake -B build
cmake --build build

Usage

SRLA Codec

Encode

./srla -e INPUT.wav OUTPUT.srl

Mode -m

You can change compression mode by -m option. Following example encoding in maximum compression (but slow) option.

./srla -e -m 4 INPUT.wav OUTPUT.srl

Max block size -B

You can change maximum block size by -B option. Following example encoding with maximum block size be 4096 sample.

./srla -e -B 4096 INPUT.wav OUTPUT.srl

Number of divisions in block -V

You can change number of division by -V option. Number of division specifies search depth of optimal block division. Following example encoding with number of divisions in block to be $2^2=4$.

./srla -e -V 2 INPUT.wav OUTPUT.srl

Long term prediction order -P

The -P option specifies long-term (pitch) prediction order, which improves the compression ratio, especially for vocal/pure tonal signals.

./srla -e -P 3 INPUT.wav OUTPUT.srl

Decode

./srla -d INPUT.srl OUTPUT.wav

Performance

We use RWC music dataset for comparison.

Decoding speed vs compression ratio

Encoding speed vs compression ratio

License

MIT