What is LDAC technology? What are the mobile phones that support ldac technology?
According to the definition given by Sony, LDAC is an encoding technology that can wirelessly transmit high-resolution audio, allowing users to wirelessly transmit high-quality audio with an amazing code rate of 990 kbps. It was first unveiled at the CES Consumer Electronics Show in 2015. At the time, Sony stated that LDAC technology was three times more efficient than standard Bluetooth encoding and compression systems. In this way, those high-resolution audio files will not be excessively compressed when wirelessly transmitted, so that the sound quality will be greatly lost.
In the past, LDAC technology was almost regarded as "Sony only", only applied to its own mobile phones, players, headphones, Bluetooth speakers. Because LDAC technology relies on the simultaneous support of audio sources and speaker systems, this makes the technology an exclusive highlight of Sony equipment. Nowadays, as long as it is a mobile phone with Android O installed, LDAC can be used to allow users to enjoy wireless high-definition music on a playback system that supports the technology.
Unlike traditional Bluetooth encoding technologies such as SBC, LDAC transmits high-resolution audio content without any degradation, and allows the device to transmit more data through wireless means, resulting in better sound quality performance. According to Sony, this is mainly due to "more efficient coding and optimized information packaging."
When transmitting LPCM high-resolution audio, LDAC technology can maintain its maximum bit depth and frequency response range, and even high-quality transmission can be achieved even for 96 kHz / 24 bit audio. In contrast, the traditional Bluetooth audio transmission technology, before transmitting LPCM audio, the first thing to do is to "degrade" the high-resolution video to a CD quality of 44.1 kHz / 16 bit, and then pass 328 kbps transmission, which is equivalent Due to two large amounts of information loss, the final quality is far from CD quality.
LDAC provides three transmission modes, the first is the 990 kbps mode with quality as the highest priority, the second is the default normal mode of 660 kbps, and the last is the 330 kbps mode similar to the ordinary Bluetooth standard, mainly to ensure the connection quality.
It should be noted that what LDAC transmits is also a lossy audio, not lossless. This point Sony does not deny that it indicates that the audio after transmission is no longer "high resolution", and it is called " High-quality "audio. However, the official claimed that even so, the loss of information caused by the transmission of LDAC is still much less than the traditional Bluetooth transmission. LDAC is not a panacea, it does not make all audio files have a magical power. It can only be said that the high-resolution audio that originally exceeded the traditional Bluetooth transmission limit can have a much better performance in the LDAC environment.
Because Sony has been reluctant to disclose the details of LDAC technology, it is regrettable that we cannot explain more about its transmission mechanism. However, after all, people expect it to want to listen to higher quality music, so the description of the sense of hearing may be more important.
The biggest feature of LDAC technology is that it ensures that the wireless audio transmission can also have enough information, which is implemented into the actual music listening sense, that is, the sound is fuller. The traditional Bluetooth transmission is shriveled and lacking due to lack of information, as if listening to a voice without emotion, only some recognizable melody remains. With the support of LDAC technology, the density and intensity of the sound are higher, the music details are richer, and the low frequency is also deeper. Not only is it an empty volume, but the "texture" is stronger.
However, LDAC has some flaws in the experience. The first is that its power consumption will be significantly higher than ordinary Bluetooth. In addition, the quality priority mode of LDAC is easily interfered by wireless signals such as Wi-Fi, and the sound will appear intermittent. At this time, we have to choose a mode with a lower transmission rate.
Of course, you can't expect LDAC's hearing to compete with wired connections. Considering the gap between the transmission rate and the anti-interference ability of the two, this is really unrealistic. However, the quality of wireless music in the LDAC environment is indeed very close to wired. It is worth noting that LDAC transmission does not mean that it can magically make low bit rate audio also exceed its own level, because this technology solves the problem of wireless transmission bandwidth. Therefore, within a certain limit, the higher the audio bit rate, the more the potential of LDAC can be realized. LDAC is not a panacea, it does not make all audio files reborn. It can only be said that the high-resolution audio that originally exceeded the traditional Bluetooth transmission limit can have a much better performance in the LDAC environment than the original.
If you have been dissatisfied with the sound quality of wireless music, the arrival of Android O is undoubtedly a great benefit. As long as you have it, wireless listening of high-quality music is finally possible.
More importantly, after the mobile phone has the Android O system and you can use the LDAC standard, you need to buy a headset or Bluetooth speaker that supports it. For now, only Sony can provide such equipment. I don't know if it will open the standard in the future, or at least it will firmly hold the exclusive supply of accessories.
With the development of network technology and people's increasing demands for quality of life, consumers will definitely want to enjoy good sound quality. In that case, we might as well start waiting for the arrival of Android O and LDAC.
Among them, Sony also authorized the LDAC audio coding technology to Google and natively supports it on Android O. LDAC is the highest coding technology of Bluetooth nowadays. It is proposed by Sony and can achieve high bit rate wireless transmission of up to 990Kbps, which means that it meets Hi-Res requirements. So it ’s not too late for us to re-understand LDAC, because since more and more mobile phone manufacturers cancel the 3.5mm headphone jack, the Bluetooth headset will gradually be driven, and the high-quality Bluetooth transmission solution will also Be more and more valued. We all know that the sound quality of Bluetooth headsets is generally inferior to that of wired headsets, in which insufficient transmission bandwidth is an important reason. But the lack of transmission bandwidth can not blame Bluetooth, because after Bluetooth 3.0, the transmission bandwidth has been increased to more than 24Mbps, even if the actual rate is reduced by more than half, it is much higher than the CD lossless music (1.41Mbps) requirements.
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