HE AAC

High-Efficiency AAC (HE AAC) is a digital audio compression system that enables broadcasters to transmit high-quality data at low bit rates.

Dolby provides the best HE AAC solutions across the broadcast chain: licensed encoder and decoder products, OEM products, and hardware.

Support industry-standardized Dolby® metadata to ensure consistent audio delivery

Meet Dolby's high testing standards

Provide optimum bandwidth savings

Ensure programs can be accurately delivered throughout the broadcast chain so consumers receive content as it was intended

Deliver higher quality stereo and 5.1-channel audio at the lowest data rates

Provide full compatibility through the complete broadcast chain including Dolby E and PCM Solutions with metadata

HE AAC Benefits

In regions where HE AAC is used, Dolby’s implementation provides the most reliable way of carrying HE AAC audio with the added benefit of Dolby metadata.

It lets broadcasters deliver stereo and 5.1-channel audio at the lowest bandwidth rates while maintaining high quality for applications where there are significant bandwidth constraints.

Full Compatibility

Dolby's MS10 and MS11 decoding platform for television and set-top boxes combines the benefits of HE AAC with compatibility of Dolby Digital home theater systems.

The MS10 and MS11 also include Dolby Digital Plus, so you get everything you need for your regional requirements.

Regional specifications for HD receivers typically combine the requirement for Dolby Digital Plus and HE AAC. The MS10 and MS11 offer the best solution for HD receiver devices used in those regions.

Dolby’s implementation of HE AAC integrates all metadata parameters required to allow broadcast audio system functionality, as in Dolby Digital and Dolby Digital Plus, and offers a number of other significant improvements.

Decoder stability: offers highly optimized switching times between channel configurations and improved reliability when used in a system with Dolby Pulse encoders, compared to generic HE AAC implementations

Error concealment: provides sophisticated error concealment mechanisms to ensure a reliable broadcast audio performance

Decoder requirements (memory and computational complexity): includes an integrated combined code base that is optimized for H.264 system-on-chip architectures within the Dolby MS10 Multistream Decoder platform

Encoder audio quality: offers superior audio quality compared to other parametric audio codecs

Dolby MS11 Multistream Decoder

The Dolby MS11 Multistream Decoder provides a single-license, cost-effective solution for decoding all the audio formats required to match broadcast standards worldwide. It builds on the benefits of the established MS10 decoder by incorporating additional value-adding features. To learn more details, read the MS11 Multistream Decoder Technical Paper.

European HDTV Receiver Specifications

As DVB does not specify which audio coder should be used for next-generation broadcasts, various broadcaster/manufacturer groups have recently worked collaboratively to gain consensus on the formats desired by broadcasters, which will then be included in European receivers. View the key outcomes for multichannel format requirements.

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