Abstract:
PURPOSE: A device and method for guiding a visual program for a scalable video transmission device are provided to display information of a multi channel by using spatial resolution scalability of a scalable video codec in multi case real time broadcasting. CONSTITUTION: A packet receiving unit(210) receives a multicasting group through an IP communication network from an IPTV media server. The packet receiving unit obtains a predetermined packet from the received multicast group. A decoding unit(230) generates image information by performing encoding of a scalable video codec about the received packet. An image processing unit(250) displays a plurality of channel information on one screen based on the image information. The packet receiving unit obtains the predetermined packet by considering image size corresponding to the scalable video transmission terminal device.
Abstract:
PURPOSE: A package content generation method and system thereof in an open type IPTV service environment are provided to enable a consumer to use and remanufacture content in an open type IPTV service environment after storing package content. CONSTITUTION: A content providing unit(10) generates a subscription license by using package content according to a subscription request of remanufacturing consumer. A content usage tool is transmitted to remanufacture package content according to the package content usage request of the consumer. The package content is stored by using the content usage tool according to the registration request of the consumer by using the content tool.
Abstract:
PURPOSE: An encoder and a decoder for distributing an image through symmetrical motion prediction and a channel division and a method thereof are provided to minimize distortion of side information and remove residual part existing in a channel code decoding process, thereby reducing calculation amount. CONSTITUTION: A key frame encoder(110) encodes the key frame of a image. As a response of the encoded image, a buffer receives a first channel image information of large distortion larger than preset value. A first channel image is divided from a side image information applying interpolation to the key frame. A quantization unit(130) quantizes a Wyner-Ziv frame through the first channel image information. A Wyner-Ziv frame encoder(140) encodes the quantized Wyner-Ziv frame.
Abstract:
움직임 보상된 영상을 이용한 분산형 비디오 복호화 방법 및 장치를 개시한다. 움직임 보상된 영상을 이용한 분산형 비디오 복호화 방법은 수신 비트스트림으로부터 키 프레임(Key-frame)을 복호화하고, 키 프레임의 이전 키 프레임에서의 이전 키 프레임 블록 및 이전 키 프레임 블록의 역방향 움직임 벡터 정보를 이용하여, 현재 키 프레임 블록 및 현재 키 프레임 블록의 순방향 움직임 벡터 정보를 계산하며, 역방향 움직임 벡터 정보 및 순방향 움직임 벡터 정보에 기초하여, 이전 키 프레임 블록 및 상기 현재 키 프레임 블록이 중첩되도록 이동시키고, 이전 키 프레임 블록 및 상기 현재 키 프레임 블록의 중첩부분의 픽셀 농도(intensity)의 평균을 산출하며, 픽셀 농도의 평균을 이용하여, 움직임 보상 프레임(MCIF: motion compensated interpolation frame)을 생성한다. 움직임 보상, 키 프레임, Key-frame, 움직임 보상 프레임
Abstract:
PURPOSE: A method and an apparatus for providing a broadcasting service are provided to enable a user to suitably select and consume a service or contents suitable for a consuming environment of a terminal. CONSTITUTION: A metadata generator(304) generates contents representation metadata to describe a possible expression of contents. An output unit(306) outputs the contents representation metadata. The contents representation metadata includes at least one content representations description element. At least content representations description element is defined by a metadata tool defined by the standards.
Abstract:
다중 멀티캐스트 채널로 전송되는 계층적 구조를 갖는 데이터 수신 장치 및 방법을 개시한다. 다중 멀티캐스트 채널로 전송되는 계층적 구조를 갖는 데이터 수신 방법은 카운트 넘버(Count Number)가 포함된 데이터들을 수신하는 단계와, 수신된 데이터들을 지터(Jitter) 버퍼에 수신한 순서대로 정렬하여 저장하는 단계와, 데이터들을 카운트 넘버의 순서에 따라 재정렬하여 데이터 버퍼에 저장하는 단계를 포함한다. 계층적 구조를 갖는 데이터 패킷, 재정렬
Abstract:
PURPOSE: An apparatus and a method for controlling a buffer using play time data during image transmission are provided to control the underflow of a buffer using play time data during image transmission. CONSTITUTION: A transmission bit rate controlling unit(103) controls a packet transmission bit rate transmitted to the receiving buffer based on the bit quantity of the packets of a receiving buffer. A transmission frame controlling unit(105) controls the number of transmission frames transmitted to the receiving buffer based on the play time of the packets of the receiving buffer. If the bit quantity of the packets of the receiving buffer is larger than a preset bit quantity threshold value, the transmission bit rate controlling unit lowers the transmission bit rate.
Abstract:
본 발명은 비디오 신호의 확대 방법에 관한 것으로서, 더욱 상세하게는 주변 블록의 정보를 이용한 효율적인 영상 확대 방법 및 이를 적용한 스케일러블 비디오 부호화/복호화 장치 및 방법에 관한 것이다. 본 발명에 따른 임의의 고해상도 영상에 대응하는 저해상도 영상의 확대 방법은, 상기 저해상도 영상이 인터 모드 데이터인지 판단하는 단계; 및 상기 저해상도 영상이 인터 모드 데이터인 경우에, 상기 저해상도 영상의 매크로 블록 모드에 따라서 적응적으로 영상 확대를 수행하는 단계를 포함한다. 스케일러블, Up-sampling, 매크로 블록
Abstract:
A method and an apparatus for preserving information security in a video multicasting service are provided to reduce a calculated amount and a delay time by immediately performing a packet filtering process without a decoding process about an encoded data. A unit generating part(110) generates a NAL(Network Abstraction Layer) unit with received video information. A memory(120) stores field information and unit form information included in the NAL unit of the video information. An information encoding part(130) encodes the NAL unit of the video information. An information packet part(140) packetizes the NAL unit of the encoded video information. An information recording part(150) records the field information and the unit form information included in the NAL unit of the video information stored in the memory to a header expansion field of a real-time transmission protocol header.
Abstract:
A multiple quality image contents service system and an upgrade method thereof are provided to maximize a reuse rate of a channel bandwidth required to improve a service quality. A first stage encoder(220) encodes a raw image data(210) into a coding rate corresponding to a channel bandwidth(B1). By using a coding parameter a second stage encoder(230) additionally extracts upgraded visual content data which is not possible to provided only with a basis layer data(P1) from original image data. The second stage encoder produces a supplementary data(P2) with reference to a substitution range size which is provided in order to encode basis layer data from basis video data. A third stage encoder(240) extracts only visual content data from an original image data which is corresponding to the upgrade level which is not possible to provide to basis layer data and supplementary data. The third stage encoder produces a supplementary data(P3) from a basis video data with reference to the substitution range size of basis layer data and supplementary data.