apt-X Lossless Audio Compression

apt-X Lossless, is APTX’s new, adaptive, lossless audio coding scheme. apt-X Lossless out-performs other lossless audio coding schemes — including FLAC, in a number of emerging application scenarios that depend upon the efficient transmission of high-quality audio over wireless channels and networks. apt-X Lossless audio codec is implemented as C and C++ code, and has been verified on x86 processors, ARM 9E and ARM Cortex M3, Texas Instruments C64xx, and others to be announced. From a system integration stand-point, apt-X Lossless is easy to port across multiple hardware and software platforms.

apt-X Lossless Overview

  • Highly scalable and dynamically adaptive coding mechanism
  • High-performance lossless compression – up to 96 kHz sampling rates
  • Mastering-grade audio – sample resolutions up to 24 bits
  • Extremely low coding delay
  • Low computational complexity, run-time overhead and device power consumption
  • Hybrid lossy coding for communications links with stringent bandwidth constraints
  • Easily portable across multiple hardware and software platforms

According to laboratory testing, apt-X Lossless out-performs other lossless audio coding schemes. This conclusion is based on performance data obtained from rigorous and intensive laboratory testing of apt-X Lossless against other types of lossless audio codecs using a set of industry-standard reference audio samples. The improvements in performance demonstrated by apt-X Lossless relative to FLAC, for example, include a significant gain in compression ratio — up to 10% more data reduction — at time delays under 2 milliseconds. This extremely low degree of latency (sub 2 ms) is of critical importance in applications involving video, interactive games, and 2-way communications.

apt-X Lossless is ideal for manufacturers of wireless audio devices, especially for consumer markets, because they have a positive impact on audio quality, bandwidth efficiency, power consumption, and processor load. Such factors are critical in the design viability of next-generation consumer devices, such as 4G/LTE smart-phones and wearable, portable media players, and go-anywhere, touch-screen tablet computers.

More info: APTX