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LDAC is an alternative to Bluetooth SIG's SBC codec. Its main competitors are Huawei's L2HC, Qualcomm's aptX-HD/aptX Adaptive and the HWA Union/Savitech's LHDC. [1]LDAC utilizes a type of lossy compression [2] [3] by employing a hybrid coding scheme based on the modified discrete cosine transform [4] and Huffman coding [5] to provide more efficient data compression.
aptX LL or aptX Low Latency is intended for video and gaming applications requiring comfortable audio-video synchronization whenever the stereo audio is transmitted over short-range radio to the listener(s) using the Bluetooth A2DP audio profile standard. The technology offers an end-to-end latency of 32 ms over Bluetooth.
SBC, or low-complexity subband codec, is an audio subband codec specified by the Bluetooth Special Interest Group (SIG) for the Advanced Audio Distribution Profile (A2DP). [1] SBC is a digital audio encoder and decoder used to transfer data to Bluetooth audio output devices like headphones or loudspeakers. It can also be used on the Internet. [2]
In 2006, On2 began recommending the CCCP as a simple decoding solution to feed video and audio to their Flix encoding application. [3] The CCCP staff recommends to not use On2's included registry patch, but rather turn on or off any necessary codecs within the CCCP settings menu.
Those codecs are used by many PC games which use voice chats via Microsoft DirectPlay API. Voxware MetaVoice Windows Media Player (voxmvdec.ax) Truespeech. Windows Media Player (tssoft32.acm) FFmpeg (decoder only) MS GSM Windows Media Player (msgsm32.acm) libgsm; FFmpeg (decoder only) MS-ADPCM Windows Media Player (msadp32.acm) FFmpeg
The first Smartphone to support LHDC was the Huawei Mate 10. [4] On 17 September 2019, the Japan Audio Society (JAS) certified LHDC with their Hi-Res Audio Wireless certification. [5] As of June 2024, the codecs certified by the JAS to bear the Hi-Res Audio Wireless logo are LHDC, LDAC, SCL6, LC3plus, SHDC, and aptX Adaptive. [6]
The last version that is compatible with Windows 2000 is version 7.10. The last version that is compatible with Windows 9x is version 3.45. Starting with K-Lite version 10.0.0, 64-bit codecs were integrated into the regular K-Lite Codec Pack. Previously, a separate 64-bit edition of the pack was available for x64 editions of Windows. [10]
IP audio codecs use audio compression algorithms to send high fidelity audio over both wired broadband IP networks and wireless 3G, 3.5G, 4G and 5G cellular broadband networks. Broadcasters are migrating to low-cost wired and wireless audio over IP instead of older and more costly fixed-line technologies such as ISDN, X.21 and POTS/PSTN.