apt-X Enhanced

apt-X Enhanced audio codecapt-X Enhanced audio coding is now regarded as the de-facto standard for high quality audio delivery throughout the Pro-audio and Broadcast market with over 20,000 radio stations worldwide relying on the technology.

The apt-X Enhanced audio codec was developed in 2000. The building blocks are similar in nature to standard apt-X; however refinements in the audio coding have had significant impact on delay, compression accuracy and dynamic range across the audio frequency range.

This audio codec contains a number of modifications to the QMF, Quantisers and Predictors, to give lower delay, higher audio resolution and a choice of bit rates (16, 20, 24 bit).

Enhanced apt-X has been embraced by the broadcast industry over recent years and is the algorithm of choice for AoIP Networks and 5.1 audio contribution and distribution.

Specification View
Compression  Ratio  4:1
Word Depth 16, 20 or 24-bit audio supported
Data Rates 60 kbps to 576kbps(16-bit 15kHz mono to 24-bit 48kHz stereo)
Frequency Response
  10Hz to 24kHz
Delay <1.89ms @ Fs 48KHz

Dynamic Range

16-bit: >92bB

20-bit: >112dB

24-bit: >120dB
THD+N -81.1dB (0.008%) (24-bit)
Sample Frequencies 0-48kHz
Auxiliary Data Embedded, sample rate dependent up to 1/4 Fs kbps
AutoSync Can re-establish connection in 5ms
BER Resilience Up to 1:10,000

Features View

XOutstanding audio quality

XLow audio coding delay

XNo duelling effects with other algorithms

XBased on Time Domain ADPCM Principles and not psychoacoustic masking

X No issue with concatenation - suitable for up to 15 consecutive passes

XInteroperability with  over 20,000 installed Radio Audio Broadcast Systems


Applications View

XBroadcast Studio Transmitter Links or Studio to Studio Links

XCinema Surround Play-Out Systems (5.1)

XWireless audio for Video

XWireless Speakers for Home Theatre Systems

XMultichannel Wireless Audio Distribution


Platforms Supported View

XARM9E

XARM 11

XTI C64xx

XFreescale 56xx

XASIC

XXilinx

XAltera

XHardware Evaluation Board

XChip + EPROM Solutions


More Information View