Data Sheet

PRELIMINARY
VS1063a Datasheet
8 SUPPORTED AUDIO FORMATS
8.1.6 Supported FLAC Decoder Formats
The FLAC decoder provides the highest quality by providing lossless audio decompression.
Upto 48 kHz and 24-bit FLAC files with upto two channels are supported.
Because of the high data rate, the requirements for data transfer are much higher than for lossy
codecs. Because of compression, audio buffer being shorter than the default FLAC block size,
and some design choices in the FLAC format itself, the peak data transfer rate must be even
higher than the sustained data rate required for uncompressed WAV files.
The FLAC decoder lowers the peak data transfer requirement a little by providing a larger
stream buffer (12 KiB).
8.1.7 Supported RIFF WAV Decoder Formats
The following RIFF WAV formats are supported, with 1 or 2 audio channels and any samplerate
upto XT ALI/256 (48 kHz with 12.288 MHz clock).
Format Name Comments
0x01 PCM 32, 24, 16 and 8 bits
0x03 IEEE_FLOAT IEEE floating point data
0x06 ALAW non-linear-quantized 8-bit samples (G.711 A-law)
0x07 MULAW non-linear-quantized 8-bit samples (G.711 µ-law)
0x11 IMA_ADPCM 4 bits per sample
0x55 MPEGLAYER3 For supported MP3 modes, see Chapter 8.1.1
0x65 G722_ADPCM two samples in 8 bits, same as 0x28f
0x28f ADPCM_G722 two samples in 8 bits, same as 0x65
0xfffe Extended PCM 32, 24, 16 and 8 bits, default channel configuration supported
Version: 0.42, 2011-11-24 30