Cybit Mobile

Cybit Mobile is a set of patent-pending digital audio manipulation and enhancement algorithms based on the theories of 3-dimensional spatial audio processing and human hearing and psychoacoustics. Cybit Mobile aims to relieve the physical constraints imposed by headphones and loudspeakers on sound reproduction, while preserving the authenticity of the original sound. The physical constraints include closely-spaced loudspeakers; headphones pressed against the ears; poor reproduction of 3-dimensional sound events; sound intensity limitation and low-frequency loss of small speakers.

Cybit Mobile currently consists of WideSound, OpenSound, MotionSound with MegaVolume, DynaBass and DigiEQ. Depending on applications, different combination of component technologies can be used. Common features of Cybit Mobile technologies are:

  • Audio input: mono or stereo audio.
  • Audio output: 2-channel audio (MegaVolume, DynaBass and DigiEQ also compatible with 1-ch output.)
  • Sampling rates: 8/10/11.025/12/16/22.05/32/44.1/48 KHz.
  • I/O format: 16 bit/sample linear PCM.
  • Reference C code: 16-bit integer C code.

WideSound [for stereo loudspeakers]

WideSound broadens the sound field produced by closely-spaced speakers, producing a significantly wider stereophonic effect while still preserving the clarity of vocals and dialogue. WideSound is especially useful for presenting spatially-dynamic audio contents of games, movies, TV or live broadcasts. WideSound works even when speakers are extremely close together, e.g., 2cm center-to-center for mobile phones.

WideSound allows users to optimize the sound-widening effect for specific applications, from mobile phones to home TV. This is achieved by setting user-controllable parameters including the distance between speakers, distance from users to speakers, and desired widening angle.

To illustrate the WideSound effect: the small device shown in the picture below would normally produce a narrow-field sound, but with WideSound, it would produce wide-field sound as if the audio signals were actually coming from the two wide-spaced speakers shown to the sides of the small device.

For WideSound, the best application is where video is involved. To have good view of video, the user must be positioned in front of the video screen, and this is where WideSound will sound best. WideSound applications include game devices, portable DVD players, mobile phones, PMP players, iPod docking stations, laptop/netbook PCs, portable TVs, AV displays/advertisements, picture/video frames, learning devices, etc.

Technical specifications: With stereo audio input, at 44.1KHz sample rate, MIPS=10.6, RAM=4KB, ROM (data)=0.8KB. At 16KHz sample rate, MIPS=3.25, RAM=2.6KB, ROM (data)=0.8KB.

OpenSound [for stereo headphones]

OpenSound converts plain audio signals into rich, immersive sound with a significantly wider perceived sound field. With OpenSound, sounds coming from headphones pressed against the ears seem to come from virtual speakers away from the ears, creating a more 3-dimensional sound field (as shown by the spherical sound zone below).

OpenSound applications include MP3/MP4/PMP players, mobile phones/smart phones/PDAs, stereo Bluetooth headsets, laptop/netbook PCs, portable DVD players, game devices, learning devices, mobile TVs, and so on.

Technical specifications: With stereo audio input, at 44.1KHz sample rate, MIPS=9.5, RAM=4.4KB, ROM (data)=0.6KB. At 16KHz sample rate, MIPS=3.2, RAM=2.8KB, ROM (data)=0.6KB.

DynaBass [for mono or stereo headphones/loudspeakers]

For mobile devices with small speakers lacking low-frequency output, DynaBass dynamically boosts certain audible spectral components for significantly improved low-frequency sensation. DynaBass also enhances bass perception by strengthening harmonics of certain low frequency components.

DynaBass is specially designed for mobile devices with small speakers having low gains at the low-frequency range (i.e., speakers with steep drop in gains from 1,000Hz down.) Ideally, DynaBass must be fine-tuned for each specific loudspeaker set, given its frequency response characteristics.

 

DigiEQ [for mono or stereo headphones/loudspeakers]

DigiEQ provides a set of pre-defined digital equalizing filters for content-specific listening. Users can select the EQ setting best suited to his/her listening preference for games, movies, video, voice or music – pop, rock, classical, jazz, and so on.

 

MotionSound [for stereo headphones/loudspeakers]

MotionSound renders dynamic, moving audio scenes that emulate a real three-dimensional sound environment. The audio scene can be pre-determined by following a script or can change dynamically as event-triggered (such as by user's input or game logic in a video game). By setting stationary sound in motion along any geometric trajectory in the 3D space around a listener's head, MotionSound is able to create very interesting perceptual effects.

MotionSound applications include interactive games, educational devices, toys/e-books, virtual tours, 3D audio presentations, and other 3D virtual reality applications.