Abstract:
본 발명에 따른 영상 콘텐츠 서비스 시스템은, 원본 영상 데이터를 제 1 계층 데이터로 부호화하는 제 1 인코더; 그리고 상기 제 1 계층 데이터보다 업그레이드된 영상 콘텐츠를 제공하기 위하여 상기 제 1 계층 데이터를 참조하여 상기 원본 영상 데이터를 제 2 계층 데이터로 부호화하는 모듈화된 제 2 인코더를 포함한다. 상술한 구성을 통하여 본 발명의 영상 콘텐츠 서비스 시스템은 업그레이드에 따른 주파수 대역 및 인코딩 시스템의 자원 낭비를 최소화하고, 다중 품질의 콘텐츠 서비스를 제공할 수 있다.
Abstract:
A server measuring a time difference between packets in a high speed down packet access network and predicting channel capacity, a terminal and a control method are provided to prevent data transmission exceeding a channel capacity and prevent packet loss. Two packets of the same size consecutively transmitted through a channel without a time delay is received(S810). The receiving time difference between the packets of the received two are measured(S820). The length of one packet is divided into the time difference among two packets. The channel capacity value is calculated(S830). The average channel capacity value is calculated by using a plurality of channel capacity values(S850). The channel capacity is predicted by using a plurality of average channel capacity values(S860).
Abstract:
본 발명은 가용 대역폭 예측 장치 및 방법에 관한 것으로서, 수신되는 RSSI 값에 대응하여 미리 설정된 현재 채널 용량을 체크하는 단계와, 현재 어플리케이션 단에서 받은 초당 패킷 수와 크기를 이용하여 채널의 가용 대역폭을 예측하는 단계와, 그리고 상기 가용 대역폭에 대응하여 채널 용량을 조절하는 단계를 진행하여 전송 비트율을 망 상황에 적응적으로 대응함으로써, 망 운용의 효율성을 높일 수 있다. RSSI, 패킷, 가용 대역폭, WLAN
Abstract:
An available bandwidth measure system between terminations for streaming multimedia and a method thereof are provided to reduce the deterioration of image quality by preventing packet loss by exceeding bandwidth of wireless network. A pair of packet are transmitted to a client from a streaming server. The time difference between packets is fed back from corresponding client. An available bandwidth is predicted in the streaming server corresponding to time difference. The data encoding bit rate is controlled in the streaming server corresponding to the available bandwidth.
Abstract:
A method for improving data sharing in an SVC(Scalable Video Coding) file format is provided to avoid the repetition of data with respect to a common part of meta data according to tracks to obtain the reduction effect of storing capacity. An ID designating a track and an ID designating a layer are formed in meta data. All the metal data designating the same layer refers to original meta data to prevent the same presentation of the original meta data from being repeatedly copied. When tracks having the same presentation are formed as one scalable base track and several sub-tracks, references capable of searching the scalable base track is formed in the respective sub-tracks to search all the tracks having the same presentation.
Abstract:
A method for sharing video data in an SVC(Scalable Video Coding) file format by using a chunk descriptor is provided to perform a random access by a scalable layer unit in one frame. One frame is formed as one or more scalable layers(L1-L3). The respective scalable layers(L1-L3) are classified by the minimum unit such as an NALU(Network Abstraction Layer Unit). A random access unit is set up in one frame by the NALU to be capable of performing a random access by a scalable layer unit. The random access unit is set up by a byte unit to secure a perfect random access.