Engadget Logo Anna announced the Ja...
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Engadget Logo Anna announced the Japanese version of the Japanese version of "Qualcomm AptX Lossless".Transmit CD lossless audio with Bluetooth
Qualcom has announced the Shinon codec "AptX Lossless" for Bluetooth.CD sampling specification 44.A high -quality codec that can transmit a 1kHz / 16bit PCM signal by lossless.If both the transmission of the sound source (player) and the receiving side (earphone / headphone or Bluetooth speaker) support this codec, it can be played wirelessly without deteriorating the sound quality of the CD.
AptX Lossless is provided as part of the high -quality audio transmission technology and software group called "Snapdragon Sound" released by Quarcom in March.In Snapdragon Sound, the sound source transmission up to 96Hz / 24bit is possible by the aptX adaptive function, but in this case, the sound quality is deteriorated due to the additional reverse compression.AptX Lossless is provided as an extension of AptX Adaptive and 44.If it is a sound source up to 1kHz / 16bit, it will be transmitted by lossless.In other words, the PCM data adopted by the CD is transmitted with the same sound quality and the lossless playback is possible.
Snapdragon Sound states that it provides a throughput that allows you to send CD lossless audio signals by improving Bluetooth High Speed Link technology.If you transmit data with sound quality or more than CD lossless from your smartphone, you will use a compression transmission of up to 96kHz / 24bit.The user is manually 44 depending on the settings..You can also choose whether to use 1kHz / 16bit or 96kHz / 24bit, but if the source sound source is CD loss, automatically 44..It will be 1kHz / 16bit.If the communication environment is bad and the throughput does not appear, switch to compression transmission to 140kbps to 140kbps.
The technical specifications are as follows.
Quarcom will have AptX codecs on Snapdragon SoC by default, so most of the smartphones distributed in North America and Europe will be compatible with AptX Lossless as music players.According to the announcement, this AptX Lossless will be available in the second half of this year, and the first product will be announced at that time.
Until now, the highest sound quality of audio playback via Bluetooth was Sony's unique codec "LDAC".By combining this with the Up -scaling technology DSEE HX, LDAC can be transmitted with sound quality equivalent to 96kHz / 24bit, but this is also an unavoidable reverse compression, and strictly speaking, the deterioration of the sound quality is inevitable.Naturally, LDAC must also support LDAC, both players, earphones / headphones, and speakers.
By the way, Apple Music and Amazon Music Ultra HD have already distributed songs, and Spotify will also provide Loseless distribution in the second half of this year.If you are planning to renew your Android smartphone in the near future, it may be better to wait until AptX Lossless is equipped with Snapdragon SoC.On the other hand, Apple's iPhone traditionally uses its own AAC for Bluetooth voice transmission, and music playback on Bluetooth does not support roseless audio.
Source: Qualcomm 2021 State of Sound
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