| Patent application number | Description | Published |
|---|
| 20100134336 | CODEC PLATFORM APPARATUS - A codec platform apparatus which can perform encoding or decoding regardless of a sampling frequency supported by a codec platform is provided. The codec platform apparatus includes an analog-to-digital converter (ADC) converting an analog input signal into a digital signal by sampling the analog input signal at a codec platform sampling frequency; a sampling frequency converter converting the digital signal provided by the ADC into a digital signal having a codec sampling frequency; and an encoder generating a bit stream by compressing the digital signal provided by the sampling frequency converter. Since there is no need to adopt a new codec platform even when an existing codec platform does not support the sampling frequency of a new codec, there is no need to implant the new codec. Therefore, it is possible to improve user satisfaction. | 06-03-2010 |
| 20100150121 | FIXED MOBILE CONVERGENCE COMMUNICATION APPARATUS USING WIDEBAND VOICE CODEC - A fixed mobile convergence (FMC) communication apparatus using a wideband audio codec is provided. The FMC communication apparatus includes an application processor which is capable of processing one or more wireless communication protocols and supports a wideband audio codec; a wideband audio signal input/output (I/O) unit which is connected to the application processor and processes the input and output of wideband audio signals; a mobile network access unit which is connected to the application processor and accesses a mobile communication network; and a wireless local area network (LAN) access unit which is connected to the application processor and wirelessly accesses an access point (AP). The FMC communication apparatus can access the base station of a mobile internet system or the base station of a mobile communication system. In addition, the FMC communication apparatus can access a Bluetooth device or an AP using a short-range wireless communication method. Moreover, the FMC communication apparatus can provide high-quality voice call services and various multimedia internet services by using a wideband audio codec. | 06-17-2010 |
| 20100157962 | METHOD FOR TRANSMITTING AND RECEIVING FRAME IN WIRELESS LAN - The transmission delay of a voice frame can be reduced by performing internal collision resolution and frame aggregation according to the presence or absence of a voice frame awaiting transmission in a MAC layer, thereby reducing an end-to-end voice transmission delay time for a VoIP service. | 06-24-2010 |
| 20100157984 | WIDEBAND VOIP TERMINAL - A wideband Voice over Internet Protocol (VoIP) terminal is provided. The wideband VoIP terminal includes a synchronous serial interface which processes audio data input thereto or output therefrom in series in synchronization with a clock; and an audio accelerator which encodes or decodes the audio data, wherein the synchronous serial interface includes a buffer buffering the audio data and a buffer controller controlling the buffer and the audio accelerator includes a memory storing the audio data processed by the synchronous serial interface under the control of the buffer controller, a memory controller controlling the memory and an encoder/decoder encoding/decoding the audio data. The wideband VoIP terminal can facilitate the input and output of data. | 06-24-2010 |
| 20100161320 | METHOD AND APPARATUS FOR ADAPTIVE SUB-BAND ALLOCATION OF SPECTRAL COEFFICIENTS - An apparatus and method for adaptive sub-band allocation of spectral coefficients are disclosed. The sizes of sub-bands are determined according to the distribution of spectral coefficients transformed from an input speech/audio signal to perform more elaborate quantization in units of sub-bands. Thus, quantization noise of the spectral coefficients is reduced, and sound quality in a frequency region is enhanced, thereby improving the quality of the signal. | 06-24-2010 |
| 20100161322 | ENCODING AND DECODING APPARATUSES FOR IMPROVING SOUND QUALITY OF G.711 CODEC - An encoding apparatus and a decoding apparatus for reducing the quantization error of a G.711 codec and improving sound quality are provided. The encoding apparatus includes a G.711 encoder which generates a G.711 bitstream by encoding an input audio signal; an enhancement-layer encoder which chooses one of a static bit allocation method and a dynamic bit allocation method that can produce less quantization error based on the input audio signal and the G.711 bitstream, and outputs an enhancement-layer bitstream including encoded additional mantissa information obtained by using the chosen bit allocation method; and a multiplexer which multiplexes the G.711 bitstream and the enhancement-layer bitstream. Therefore, it is possible to reduce the quantization error of a G.711 codec and improve sound quality. | 06-24-2010 |
| 20110178807 | METHOD AND APPARATUS FOR DECODING AUDIO SIGNAL - Provided are a method and an apparatus for decoding an audio signal. A method for decoding an audio signal encoded by a layered sinusoidal pulse coding scheme using one or more sinusoidal pulses includes decoding the encoded audio signal, setting a smoothing frequency band of the decoded audio signal according to a layer structure of the layered sinusoidal pulse coding scheme, dividing the smoothing frequency band into one or more subbands, and smoothing the decoded audio signal on a subband-by-subband basis. Accordingly, a decoding operation time can be reduced and the quality of a synthesized signal can be improved by variably setting a frequency band to be smoothed, when decoding an audio signal encoded by a layered sinusoidal pulse coding scheme using one or more sinusoidal pulses. | 07-21-2011 |
| 20110301961 | METHOD AND APPARATUS FOR ENCODING AND DECODING AUDIO SIGNAL USING ADAPTIVE SINUSOIDAL CODING - A method and an apparatus for encoding and decoding audio signals using adaptive sinusoidal coding are provided. The audio signal encoding method includes the steps of dividing a synthesized audio signal into a plurality of sub-bands, calculating the energy of each sub-band, selecting a predetermined number of sub-bands having a relatively large amount of energy from the sub-bands, and performing sinusoidal coding with regard to the selected sub-bands. Application of sinusoidal coding based on consideration of the amount of energy of each sub-band of the synthesized signal improves the quality of the synthesized signal more efficiently. | 12-08-2011 |
