April 12, 2018 0 Comments

Bluetooth has quickly become the most common way to enjoy wireless audio through speakers and headphones. However, one concern that some have is with regards to Bluetooth and the overall reduction of audio quality. This is true but it is out of date. After Qualcomm has completed its acquisition of CSR plc on August 13, 2015, aptX audio codec techonology was widely used in consumer eletronics products. That is a new milestone in the field of Bluetooth audio quality.

What is aptX

The quality of stereo audio through Bluetooth has improved over time. The Qualcomm® aptX™ audio coding algorithm originated in the late 1980s at Queen’s University Belfast. This innovative work was focused on bit rate reduction and achieved significant bit rate efficiencies while preserving audio quality.

It's marketed as an upgraded to the traditional SBC codec. The claim to fame for aptX is its ability to deliver "CD-like" audio quality over Bluetooth wireless. However, if you want to enjoy music with this audio quality, both the Bluetooth source and sink devices must support the aptX codec.

Fortunately, with the help of Qualcomm and the pursuit of sound quality by Bluetooth device manufacturers, many headphones and mobile phones are supported aptX now. aptX now is widely used in many of the world’s finest smartphones, speakers, soundbars, headphones and tablets. With aptX, music lovers can enjoy wired quality sound - wirelessly.

aptX vs SBC Technical Details

  Release Sample Rate Bit Rate(Max) Latency Compression
aptX 1989 48 kHz (stereo) 384 kbit/s (stereo) Less than 130 ms Non-destructive
SBC 2003 44.1 kHz 328 kbit/s About 200 ms Destrucive

SBC was born for Bluetooth transmission, was perfect for connecting phone headsets and speakerphones. It's free for Bluetooth encoder and player. But the high lantency and low quality transmission of conventional music content let people stop.

The aptX codec uses a special bit rate reduction technique that replicates the entire frequency of the audio while allowing the data to fit through the Bluetooth "pipe" wirelessly. The data rate is equivalent to that of a music CD (16-bit/44 kHz), hence why the company equates aptX with "CD-like" sound.

To fix some of the sync issues caused by latency, CSR developed the aptX and subsequently the aptX-Low Latency codec. Regular aptX does somewhat improve latency due to its more efficient encoding algorithm than SBC. However, aptX-LL has the most noticeable impact on latency.

There is no doubt that AptX do provide a better solution for audio quality. It's reasonable for it to charge the manufacturer by authroization.

Do Origem products support aptX?

Yes, we value our users' experience. The audio quality is a very important reason why we enjoy listening music. From Origem HS-1, every headphone will support aptX. That's our commitment to all our customers.


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