Listening to music is one of the most common use cases for mobile devices putting requirements on delivering high quality audio and long playback times. ST-Ericsson has adopted low-power audio in all platforms and we are at the forefront of bringing surround experience and low-power-consuming audio playback to mobile devices with our smartphone platforms.
Users want surround sound to enrich their video experience. ST-Ericsson offers a broad set of audio codecs, from the traditional stereo codecs, such as MP3 and AAC+, to multichannel audio codecs supporting 5.1/7.1 surround experience at very low power. To improve the sound experience even further, we provide a wide range of audio enhancement effects, such as virtual surround sound for stereo headsets (enabling 5.1/7.1 everywhere!) empowered by our latest 3D audio technology.
Do not forget that a mobile phone still is used for making voice calls and thus the quality of the conversation is very important; users expect to have long, noise-free and pleasant phone calls. ST-Ericsson platforms support several digital/analog microphones inputs in order to achieve great audio capture quality, both for surround capture and for voice calls. Microphone arrays can be created in a small phone factor, and combined with ST-Ericsson audio technology it allows the recording of true surround sound and impressive high–quality, noise-free voice calls.
ST-Ericsson has built a smart platform architecture, supporting excellent audio quality at ultra-low power. While the user is listening to music, the platform decodes the audio stream and buffers a large piece of audio data. This means that most parts of the platform can be in sleep mode to save power and preserve the best sound quality. The Playback Time Extender (PTE™) is ST-Ericsson data buffer technology to increase playback time. It typically doubles the audio playback time of a mobile phone platform by buffering audio data at high speed and then putting the whole platform in low power. Originally developed for audio, the PTE™ technology is now used also for video.
ST-Ericsson has extensive experience in delivering audio solutions both in hardware and in software. We collaborate with Ericsson Research and ST in several research activities to create, test and verify the introduction of new technologies at IP level. Our complete software stack offering, with integrated and verified IPs, provides full performance into the Android framework.
3D audio technology uses a stereo audio signal to create an illusion of sound sources coming from different places in a virtual 3D space. It enables several use cases for listening to audio in stereo speakers or a stereo headset.
Common uses cases are the following: 5.1/7.1 virtual surround sound, stereo widening, and improved multi-party voice conferences by positioning each calling user around the listener.