Abstract:
PURPOSE: Video encoding apparatus and a method thereof, and video decoding apparatus and a method thereof are provided to selectively use the discrete cosine transform-based interpolation filter (DCT-IF) and the discrete sine transform-based interpolation filter (DST-IF), thereby maximizing the compression of video in encoding. CONSTITUTION: A prediction unit (100) selects either DCT-IF or DST-IF based on rate distortion costs (RDC) and generates a predicted block of a current block using the selected IF. A first subtractor (110) subtracts the predicted block from the current block to generate a first residual block. A transformation unit (120) generates a frequency conversion block with the conversion of the first residual block. A quantization unit (130) quantizes the frequency conversion block. A bit stream generator (140) encodes information about the selected interpolation filter and the quantized frequency conversion block into bit stream. [Reference numerals] (100) Prediction unit; (110) First subtractor; (120) Transformation unit; (130) Quantization unit; (140) Bit stream generator; (150) Reverse-quantization unit; (160) Reverse- transformation unit; (170) Calculation unit; (180) Frame memory; (AA) Inputted image; (BB) Bitstream
Abstract:
본 발명은 영상 부호화 장치 및 이의 영상 부호화 방법, 그리고 영상 복호화 장치 및 이의 영상 복호화 방법에 관한 것이다. 본 발명의 일 실시 형태에 따른 영상 부호화 장치는, 비트율 왜곡 비용을 기반으로, 이산 여현 변환을 기반으로 하는 보간 필터와 이산 정현 변환을 기반으로 하는 보간 필터 중 하나의 보간필터를 선택하고, 상기 선택된 보간필터를 사용하여 현재 블록의 예측 블록을 생성하는 예측부와, 상기 현재 블록에서 예측 블록을 감산하여 제1 잔차 블록을 생성하는 제1 감산부와, 상기 제1 잔차 블록을 변환하여 주파수변환블록을 생성하는 변환부와, 상기 주파수변환블록을 양자화하여 양자화된 주파수변환블록을 생성하는 양자화부와, 상기 양자화된 주파수변환블록과 상기 선택된 보간필터에 대한 정보를 비트스트림으로 부호화하는 비트스트림 생성부를 포함한다.
Abstract:
PURPOSE: A personalized cloud service providing system and a method thereof are provided to improve user convenience by applying a demand of a user when using the personalized cloud service. CONSTITUTION: A cloud server(110) registers a new service. A multimedia device(130) adds a menu for the new service to a user interface. A mobile terminal(140) executes an installed remote controller application. When the application is connected with the cloud server through the multimedia device, the cloud server transmits a service ID for the service to the mobile terminal. The mobile terminal receives UX(User Experience) information corresponding to a UX management server(120). [Reference numerals] (110) Cloud server; (120) UX management server; (130) Multimedia device; (140) Mobile terminal; (AA) Control information; (BB) Multimedia contents; (CC) Service ID; (DD) Remote control; (EE) UX request; (FF) UX information;
Abstract:
본 발명은 멀티미디어 클라우드 시스템에서 화면변화에 따른 광고영상 출력 장치 및 방법에 관한 것이다. 본 발명에 따른 멀티미디어 클라우드 시스템에서 클라이언트의 패킷 수신 방법은, 수신부가, 서버로부터 패킷을 수신하는 과정과, 상기 수신부가, 상기 수신된 패킷 내 정보를 기반으로 상기 서버가 휴면상태인지 여부를 판단하는 과정과, 상기 서버가 휴면상태임이 판단될 시, 광고영상 디스플레이부가, 상기 서버의 화면 대신 광고영상을 화면에 출력하는 과정을 포함하는 것을 특징으로 한다.
Abstract:
PURPOSE: An image transmission system for divided screen synchronization and a method thereof are provided to reduce loads and resources of a server by effectively restoring a screen at a client side. CONSTITUTION: An image change sensing unit(41) does not sense an image change, a frame header generation unit(42) is executed instead of a codec(43). When the image change sensing unit senses the image change between the frames, the codec generates a bit stream corresponding to a current frame. A transmission unit(44) transmits the bit stream transmitted by the codec or the frame header generation unit to a client through a packetized process. [Reference numerals] (41) Image change sensing unit; (42) Frame header generation unit; (43) Codec; (44) Transmission unit; (AA) No change; (BB) Changed
Abstract:
PURPOSE: A method for providing a multimedia cloud service in a social network service server of a multimedia cloud system, a device for providing the multimedia cloud service in a client of the multimedia cloud system, and a method thereof are provided to supply the multimedia cloud service related to an SNS(Social Network Service), thereby sharing computing resources not in use in the system with registered SNS users. CONSTITUTION: When one personal server is selected, a client transmits a cloud service request message to an SNS server(211,213). When an IP and a port number for one virtual machine in the selected personal server are received from the SNS server, the client sets connection for a streaming service with the virtual machine(215-221). The client receives video streaming through a routing table protocol(RTP)(223). The client outputs the received video streaming to a screen of the virtual machine after decoding in real time(225). [Reference numerals] (201) Selecting an SNS access menu?; (203) Performing an authentication procedure by connecting an SNS server; (205) Authentication successes?; (207) Access to an SNS site; (209) Displaying an idle computer resource sharing personal server list; (211) Selecting the personal server; (213) Transmitting a cloud service request message to the SNS server; (215) Receiving an IP and a port number for one virtual machine in the selected personal server from the SNS server; (217) Transmitting a DESCRIBE message of an RTSP protocol to the virtual machine; (219) Receiving an OK message of the RTSP protocol from the virtual machine?; (221) Transmitting a PLAY message of the RTSP protocol to the virtual machine; (223) Receiving video streaming through the RTP protocol from the virtual machine; (225) Decoding the video streaming and outputting to a monitor; (AA) Start; (BB,RR,HH,KK) No; (CC,EE,GG,II,JJ) Yes; (LL) End
Abstract:
PURPOSE: An advertisement image output device and a method corresponding to screen change in a multimedia cloud system are provided to reduce resources and the amount of calculation necessary for encoding and decoding of a screen. CONSTITUTION: A receiving unit(212) receives a packet from a server and determines a dormant state of the server based on information in the received packet. When the server is the dormant state, an advertisement image display unit(214) outputs an advertisement image instead of a screen of the server. The receiving unit extracts dormant state information from the packet and determines the extracted information. When the server is a non-dormant state, the receiving unit extracts a screen compression bitstream from the packet. [Reference numerals] (200) Server; (202) Screen input unit; (204) Dormant state determination unit; (206) Screen encoding unit; (208) Transmitting unit; (210) Client; (212) Receiving unit; (214) Advertisement image display unit; (216) Screen decoding unit; (218) Screen image display unit
Abstract:
An intra prediction process, a method and an apparatus for an image encoding and decoding process using the intra prediction process are provided to perform image encoding and decoding processes in a unit of rows after setting a prediction pixel value in a unit of rows. An intra prediction process comprises the following steps of: selecting the i-th prediction pixel value using a recovered reconstruction pixel value of M*N object block; recovering the i-th residual coefficients of the object block by performing an inverse-quantization process and an inverse process corresponding to a quantization coefficients outputted from an input bit stream; and computing the i-th reconstruction pixel value of the object block by computing the i-th residual coefficients and the i-th prediction pixel value.
Abstract:
Motion estimation of a macro block in inter16x16, inter16x8, and inter8x16 modes is performed and a determination of whether to further perform motion estimation in a P8x8 mode is made. Motion estimation in P8x8 mode is either omitted or performed and one mode is determined according to a rate distortion cost of the respective modes. Spatial prediction encoding may then be performed or omitted based on comparing the rate distortion cost of the one mode with a predetermined value. Accordingly, by selectively omitting variable block motion estimation and spatial prediction encoding which are the most complicated operations in an H.264 encoder, determining an encoding mode is rapidly performed such that encoding speed increases.
Abstract:
소정 크기의 블록에 대한 인트라 예측 수행시에, 예측하고자 하는 블록내의 화소를 사용함으로써 압축률을 높인 무손실 동영상 인코딩 및 디코딩 방법, 그 장치가 개시된다. 본 발명에 따라, 동영상 무손실 인코딩 방법은 (a) 예측하고자 하는 MxN 블록내의 화소값들을 각각 예측하는데 있어서, 상기 각각의 화소값은, 부호화 모드에 따라 정해지는 예측방향으로 상기 MxN 블록내에서 가장 인접한 화소를 가지고 예측되는 단계; 및 (b) 상기 예측된 화소값과 상기 예측하고자 하는 화소값의 차를 엔트로피 코딩하는 단계를 포함하는 것을 특징으로 한다. 이에 의해, 종래의 무손실 부호화 방법보다 압축률이 크게 높아진다.