Audio & Acoustics

Control sounds freely, and create uncharted acoustic experiences

High-Quality Sound Technologies

There is growing demand for high-quality sound in audio products, and Sony is developing a variety of technology for users to enjoy high-resolution sound. These include DSEE HX™ (Digital Sound Enhancement Engine) which upscales existing music such as CDs or MP3 files to near high-resolution sound quality, LDAC audio coding technology for transmitting high-resolution sound wirelessly, and DSD* remastering engine which converts all formats of music data into DSD signals for high fidelity music listening.* DSD (Direct Stream Digital): Super Audio CD recording method that expresses audio signals using 1-bit digital pulse density modulation.

upscaling with DSEE HX™ (image)

Digital Noise Canceling (DNC)

In 2008, Sony created the world’s first headphones with “Digital” noise canceling technology and released them as a product. DNC technology consists of signal processing algorithms, LSI (Large Scale Integration) hardware, and acoustic transducer technologies. This fusion technology delivers superior noise canceling performance with low power consumption in a compact size. Seeking to boost its performance further, we also developed application algorithms such as interpersonal difference optimization of personal variation. Working together with the design team, we then achieved the highest level of noise canceling performance in the world. DNC technology is now evolving to include Ambient Sound Mode which reduces unwanted noise and also extracts the desired sound out of all sound heard by the microphone.

how digital noise canceling works

Audio Codec

Sony has contributed to MPEG standardization for AAC audio compression methodology which is now used in digital broadcasting and music delivery services. We continue to contribute technologies to MPEG standardization related to 3D audio for 4K and 8K broadcasts as well as 360° VR (Virtual Reality). 3D Audio made it possible for sound to come from any direction in space, and achieved an unprecedented level of live-quality sound. Our current efforts are focused on the development of new playback systems like object audio in 3D acoustic space and Higher Order Ambisonics (HOA). We are also exploring 3D Audio playback compatible with free-viewpoint visualization.

history of MPEG standardization

Source Separation

Source separation is technology with high expectations in a wide variety of applications including extracting vocals from past recordings and remixing them, as well as extracting the sound of instruments from monoaural recordings and rearranging it in the latest spatial audio format. We have been developing cutting-edge source separation technology for over 10 years while getting feedback from creators. Also, we achieved the best separation score in Music Separation Task at the international competition SiSEC (Signal Separation Evaluation Campaign) 3 times in a row.

conceptual diagram of source separation

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