Abstract:
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.
Abstract:
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.
Abstract:
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.
Abstract:
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.
Abstract:
Provided are a method for managing a customer-oriented service level agreement metrics and profile quality, and a service level agreement system thereof. The system includes an interworking device, a customer-oriented SLA metrics managing device, an SLA quality managing device, and a providing device. The interworking device collects quality information, which includes information on SLA agreement metrics of a customer, profile quality, fault quality, and network performance quality, and subscriber information for each customer, and the customer-oriented SLA metrics managing device generates the customer-oriented profile quality monitoring information corresponding to a customer based on the received SLA metrics and metrics value for each customer to manage quality.
Abstract:
A method and apparatus for predicting video traffic are provided. The method includes extracting the statistical properties of previous Moving Picture Experts Group (MPEG)-4 video traffic and predicting the size of a subsequent frame based on the statistical properties of the previous MPEG-4 video traffic. Therefore, it is possible to address such problems associated with traffic bursts as transmission delays or low throughputs and thus to improve the performance of communication and network systems that transmit video traffic.