In some embodiments, spatially realistic audio may be provided for a conference call. Voices from participants on the left side of a display, in a conference call, may be directed through audio on the left side of the display at the other conferencing system in the conference call (similarly for voices from the center and right side of the display). In some embodiments, two speakers may be used in the system to create synthesized stereo sound at a location specified by directional information received as side information along with the existing audio channel. The location may be determined by using beamforming with integrated microphones on a camera or speakerphone. In some embodiments, the audio signal and directional information may be sent in the form of a left audio channel and a right audio channel.

Video and audio conferencing system with spatial audio

A communication system (e.g., a speakerphone) includes an array of microphones, a speaker, memory and a processor. The processor may perform a virtual broadside scan on the microphone array and analyze the resulting amplitude envelope to identify acoustic source angles. Each of the source angles may be further investigated with a directed beam (e.g., a hybrid superdirective/delay-and-sum beam) to obtain a corresponding beam signal. Each source may be classified as either intelligence or noise based on an analysis of the corresponding beam signal. The processor may design a virtual beam pointed at an intelligence source and having nulls directed at one or more of the noise sources. Thus, the virtual beam may be highly sensitive to the intelligence source and insensitive to the noise sources.

Forming beams with nulls directed at noise sources

A system may be configured to: receive remote audio signals and corresponding spatial indicators from remote systems; generate output signals for local speakers based on the remote audio signals and the corresponding spatial indicators; supply a microphone input signal to a first echo canceller in a series of echo cancellers, where each echo canceller of the series corresponds to a position in a set of positions along a one-dimensional locus connecting the speakers; map each of the remote audio signals to a corresponding one of the positions based on the corresponding spatial indicator; for each position of the set of positions, combine any of the remote audio signals that map to that position in order to form a corresponding input signal for the corresponding echo canceller; transmit a resultant signal including at least an output of a last echo canceller of the series to the remote systems.

Videoconferencing echo cancellers

In various embodiments, a speakerphone and/or remote control may be used to control a video conferencing system through a system codec. In some embodiments, video conferencing features may be provided through the speakerphone and/or remote control. For example, features to manage video calls, audio calls, and bridging multiple video and/or audio calls into a single conference may be accessed through a keypad on the speakerphone, a remote control, and/or through a video conference system. Options and indicators may be provided on a screen of the speakerphone and/or video conferencing system. In some embodiments, a video call may be dialed, redialed, muted, answered, added to an existing conference, and/or terminated using a speakerphone and/or remote control. In some embodiments, a call length timer may be implemented, the volume may be adjusted, or a camera may be adjusted through a speakerphone and/or remote control.

Speakerphone supporting video and audio features

In various embodiments, a camera may be controlled by one or more motors in a base of the camera. Cables and other components may be used to manipulate the camera lens through the side arms of the camera. Putting the motors in the base may reduce the size of the outer case of the camera and add stability. A pan motor may pan the camera while a tilt motor may move a tilt pulley relative to a lens portion of the camera (which may or may not tilt the camera depending on the panning motion of the camera). In some embodiments, images from the camera may be converted into a serialized stream and transported over a cable from the lens through a center shaft of the camera.

Coordinated camera pan tilt mechanism

The present invention relates to a data CODEC system for computer. The data CODEC system for computer comprises a system control software, a multichannel audio/speech and multimedia data signal processor, and a multichannel audio/speech and multimedia data input-output unit. The system control software communicates multichannel audio/speech and multimedia data with the multichannel audio/speech and multimedia data signal processor according to control of various application programs. The multichannel audio/speech and multimedia data signal processor processes multichannel audio/speech and multimedia data. The multichannel audio/speech and multimedia data input-output means inputs/outputs multichannel audio/speech and multimedia data from/to an external system.

Data CODEC system for computer

PURPOSE: A multi-channel audio/voice/data coder-decoder(CODEC) device for a personal computer(PC) is provided to have input/output functions relating to an external multi-channel audio/voice and to have data input/output functions, to control a system by a system control software which exchanges various data with a fixed storage device of the PC to accumulate application programs through the fixed storage device, and which performs control data transmissions and audio/voice/multi media data transmissions, so as to carry out various multi media processing functions CONSTITUTION: A system control software(10) accumulates execution programs of many application programs(20) in a multi-channel audio/voice/data signal processor(30), and performs multi-channel audio/voice/multi media data processing functions The multi-channel audio/voice/data signal processor(30) accumulates various multi-channel audio/voice/multi media data processing programs by the application programs(20), and inputs multi-channel audio/voice/multi-media data from the application programs(20), then transmits result data to the application programs(20) The signal processor(30) inputs/outputs the multi-channel audio to an exterior, and inputs/outputs a compressed audio or data to the exterior A multi-channel audio/voice/data input and output(I/O) unit(40) comprises as follows A multi-channel audio I/O circuit inputs and outputs the multi-channel audio and the multi-channel voice with the exterior under the control of the application programs(20) A data I/O circuit inputs and outputs compressively-coded data as a digital signal to or from the exterior by a serial interface

Multi-channel audio, voice, and data codec device having multi media processing acceleration function and input, output functions for personal computer

PURPOSE: A method for parallel processing of MPEG-2 advanced audio coding algorithm is provided to supply software structure which can process multi channel compression algorithm in real time by executing real-time processing based on hardware of parallel processing structure. CONSTITUTION: The method for parallel processing of MPEG-2 advanced audio coding algorithm includes two steps. A first step includes several steps. A pulse code modulation data input module into which signal is inputted is executed.(21) A psychology sound modeling module which executes encoding by modeling hearing phenomenon of human is executed.(22) A time/frequency converting module which converts signal of time area to signal of frequency area is executed.(23) A data transmitting part which transmits converted data is executed.(23-1) A second step includes several steps. A data inputting part which receives program waiting signal and signal transmitted from the first step is executed.(24-2) A data compression encoding module which executes compression encoding of multi channel audio signal of frequency area is executed.(24) A quantization module for quantizing compressed audio signal is executed.(25) A bit stream forming module which forms bit stream is executed.(26) The result is transmitted to the first step.

Hong Jin U

Papers

Data CODEC system for computer

Multi-channel audio, voice, and data codec device having multi media processing acceleration function and input, output functions for personal computer

Method for parallel processing of mpeg-2 advanced audio coding algorithm