LDAC

LDAC is Sony's proprietary Bluetooth audio codec.
It support 3 bitrates: 990, 660 and 330kbps.
990 is about 3 times as much as the standard SBC codec.

It can transmit PCM audio up to 24 bit / 96 kHz.

From Android 8 (Oreo) on, LDAC is included.


 

Nice looking pictures by Sony.

It almost suggest LDAC is lossless but is it?

 

The bit rate of CD audio= 2*16*41100=1411 kbs
The bit rate of a 24/96 recording is 3072 kbs

 

Obvious although you can feed LDAC 24/96 it must be lossy compressed to fit into 990 kbs.
The same applies to CD audio.

It is thinkable that a lossless compression will stay below the 990 but it is not quaranteed.

 

Robert Triggs has a technical description of how LDAC (possibly) might work.
It is lossy but in a clever way.

 

Lossy or not, at 990 kbs it is the Bluetooth audio codec with the highest bit rate up to now.

Reference
  1. What you need to know about Sony's LDAC - Robert Triggs 2017
  2. The ultimate guide to Bluetooth headphones: LDAC isn't Hi-res - Robert Triggs 2018