SCL6 (codec)
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| Developed by | MQA Ltd. |
|---|---|
| Type of format | Audio codec |
SCL6, also known as MQair, is a proprietary audio coding technology developed by MQA Ltd., which allows streaming high-resolution audio over Bluetooth, Ultra-Wideband (UWB) and Wi-Fi connections. Data rates scale from less than 200 kbit/s (lossy) up to 20 Mbit/s (lossless) and it supports digital audio formats sampled up to 32 bits/384 kHz.[1] It was developed for use in various products, including headphones, smartphones, portable media players, active speakers, and home theaters.
On 9 November 2022, MQA Ltd. announced a new product called MQair (SCL6),[2] and the Japan Audio Society (JAS) released a statement certifying SCL6 with the "Hi-Res AUDIO WIRELESS" logo.[3] SCL6 was the fourth codec to receive this certification, along with LC3plus, LHDC and LDAC. The name SCL6 stands for the sixth generation of scalable codec developed by MQA Ltd. SCL6 can handle files from most music streaming services including both PCM and MQA music files. SCL6 can be enabled via a firmware update on existing headphones, scales in realtime and works at its highest quality at up to 10 meters.[4]
Audio coding[edit]
The SCL6 codec has the ability to scale from less than 200 kbit/s lossy compression up to 20 Mbit/s lossless compression for up to 32 bit/384 kHz PCM. Real-time adaptive scaling with changing communication link quality, and switching between lossy and lossless compression, were unique features at the time of its development. The codec prioritizes time-domain performance, claimed to provide more accurate sound with fewer artifacts than codecs which prioritize frequency-domain performance.[5]
The SCL6 codec uses time-domain ADPCM and bitrate reduction. It can be implemented in software which allows a firmware update to add SCL6 to many existing products.[6]
See also[edit]
References[edit]
- ↑ "MQA Says It's Cracked The Streaming Of Hi-Res Audio Over Bluetooth". Forbes. Archived from the original on 24 July 2023. Retrieved 9 November 2022. Unknown parameter
|url-status=ignored (help) - ↑ "Introducing a new technology from MQA". Archived from the original on 24 July 2023. Retrieved 9 November 2022. Unknown parameter
|url-status=ignored (help) - ↑ ""Hi-Res AUDIO WIRELESS" Two new codecs added to "Hi-Res AUDIO WIRELESS" logo's certified codecs". Archived from the original on 24 July 2023. Retrieved 9 November 2022. Unknown parameter
|url-status=ignored (help) - ↑ "MQA Introduces MQair for Wireless Hi-Res Audio Music Streaming". 9 November 2022. Archived from the original on 24 July 2023. Retrieved 9 November 2022. Unknown parameter
|url-status=ignored (help) - ↑ "What is SCL6? All the facts on the future of wireless audio". 10 February 2023. Archived from the original on 10 February 2023. Retrieved 1 October 2023. Unknown parameter
|url-status=ignored (help) - ↑ "How Many Bits Would You Like with Your Music? The Case of the SCL6 Scalable Codec". 16 March 2023. Retrieved 1 October 2023.
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