Abstract:
본발명은설치된안테나의수와사용할안테나수를고려하여안테나조합을결정하는안테나조합결정부, 상기입력받은비트열의송신심벌계수를채널환경에따라결정하는송신심벌결정부, 상기결정된안테나조합정보와상기결정된송신심벌을이용하여부호행렬을결정하는골든 SM(spatial modulation) 부호화부및 골든 SM 부호화부에서부호화된신호를송신하는다중안테나를포함하는다중안테나시스템을개시하고있다.
Abstract:
안티 엘리어싱 필터를 사용하지 않고 기저계층의 화질을 향상 시키는 스케일러블 비디오 부/복호화 방법 및 장치가 개시된다. 스케일러블 비디오 복호화기는 부호화기로부터 수신한 영상을 복호화하는 엔트로피 디코딩부; 복호화된 영상의 블록 왜곡을 감소 시키는 디블록킹 필터; 상기 디블록킹 필터를 통과한 영상에 움직임 보상을 적용하는 움직임 보상부; 상기 움직임 보상부에서 움직임 보상이 적용된 영상에 하프펠(Half-pel) 보상을 적용하는 하프펠 필터; 및 상기 하프펠 필터에서 하프펠 보상이 적용된 영상을 출력하는 출력부를 포함한다. 부호화, 스케일러블, 복호화, 엘리어싱, 움직임 보상
Abstract:
PURPOSE: A XOR- calculation FEC(Forward Error Correction) for a burst data loss recovery and an unequal error protection method having a HARQ(Hybrid Automatic Repeat request) are provided to effectively recover the burst loss without extending the transmission bandwidth. CONSTITUTION: A forward loss protection packet is produced through an XOR calculation of a base layer packet of a current GoP(Group of Picture) and the base layer packet of the previous 2nth GoP(S10). The forward loss protection packet is added to the last packet of the previous nth GoP(S20). A backward loss protection packet is produced through the XOR calculation of the base layer packet of the current GoP and the base layer packet of the afterward 2nth GoP(S30). The backward loss protection packet is added to the last packet of the afterward nth GoP(S40). [Reference numerals] (AA) Start; (BB) End; (S10) Generating a forward loss protection packet(current GoP base layer packet(XOR) and previous 2n-th GoP base layer packet); (S20) Adding the forward loss protection packet to the last packet of the previous n-th GoP; (S30) Generating a backward loss protection packet(current GoP base layer packet(XOR) and afterward 2n-th GoP base layer packet); (S40) Adding the backward loss protection packet to the last packet of the afterward n-th GoP;
Abstract:
PURPOSE: A data transmitting and receiving apparatus using OFDM(Orthogonal Frequency Division Multiplexing) modulation and a method thereof are provided to have an OFDM property resistant to multipath fading and lower the PAPR(Peak-to-Average Power Ratio) to 0dB. CONSTITUTION: A data transmitting apparatus(100) includes an OFDM modulating unit(110), a PAPR control unit(120) and a signal transmitting unit(130). The OFDM modulating unit generates multiple modulated data symbols by symbol-mapping inputted data and converts the multiple modulated data symbols in a frequency domain into real number signals in a time domain. The PAPR control unit performs angle modulation of the real number signals in the time domain, and then cyclically shifts the angle modulated signals in the frequency domain. The signal transmitting unit transmits the cyclically shifted signals. [Reference numerals] (112) Symbol mapping unit; (121) Scaling unit; (122) Angle modulation unit; (124) FFT unit; (125) Shift unit; (126) IFFT unit; (130) Signal transmitting unit; (AA) Information bit;
Abstract:
본 발명은 다중화 장치와 방법 및 역다중화 장치와 방법에 관한 것으로, 더욱 상세하게는 디지털멀티미디어방송(이하 'DMB'라 함) 기반의 다중화 장치와 방법 및 역다중화 장치와 방법에 관한 것이다. 본 발명의 일 실시 예에 따른 다중화 장치는 기본 계층의 기초 스트림, 기본 계층의 객체 정보, 강화 계층의 기초 스트림 및 강화 계층의 객체 정보를 제공받아 패킷화하는 패킷화기와; 기본 계층의 객체 정보가 포함된 14496 섹션, 강화 계층의 객체 정보가 포함된 14496 섹션 및 강화 계층의 기초 스트림 정보가 포함된 SCST(Scalable Contents Service Table) 섹션을 생성하고, 기본 계층의 객체 정보와 상기 강화 계층의 객체 정보를 독립 또는 종속관계로 기술하는 디스크립터들이 포함된 IOD와 SCST 테이블을 연결하는 디스크립터를 포함하는 PSI 섹션을 생성하는 섹션 발생기와; 패킷화된 기본 계층의 기초 스트림, 패킷화된 기본 계층의 객체 정보, 기본 계층의 객체 정보가 포함된 14496 섹션 및 PSI 섹션을 다중화하여 기본 계층 전송스트림을 생성하고, 패킷화된 강화 계층의 기초 스트림, 패킷화된 강화 계층의 객체 정보, 강화 계층의 객체 정보가 포함된 14496 섹션 및 SCST 섹션을 다중화하여 강화 계층 전송스트림을 생성하는 다중화기를 포함한다. 다중화, 역다중화, IOD(Initial Object Descriptor), OD(Object Descriptor), BIFS(Binary Format for Scene), PMT(Program Map Table), DMB(Digital Multimedia Broadcasting), AT-DMB, 스케일러블
Abstract:
PURPOSE: An apparatus for single transmission broadcasting service without needing an ETI input signal process is provided to efficiently construct a transmission system through a multiplexer and a transmitter. CONSTITUTION: An MSC(Main Service Channel) generating unit(207) generates an MSC which is necessary for each transmission frame. An FIC(Fast Information Channel) generating unit(209) generates an FIC based on MCI and SI information which is received from an multiplex managing unit. A transmission frame configuring unit(211) configures a transmission frame to the MSC which is generated from the MSC generating unit. A DMB(Digital Multimedia Broadcasting) modulating unit(213) receives the transmission frame from the transmission frame configuring unit.
Abstract:
PURPOSE: An apparatus and a method for transmitting and receiving data are provided to improve nonlinear distortion due to a power amplifier and distortion generated by the modulation between mutual frequencies. CONSTITUTION: A symbol mapping unit(120) generates a plurality of modulation data symbols by mapping a symbol for an input signal. A normalization and error signal transducer(130) converts a plurality of modulation data symbols to a real number signal of a time domain in a frequency domain. Each modulator(140) modulates the real number signal. A PAPR control and power normalization unit(150) control the size of a sine element of each modulated real number signal according to a first gain. The PAPR control and power normalization unit electrically normalize the sine component and the cosine component of the real number signal. A signal transmitting part(160) changes the real number signal electrically normalized into a radio frequency signal.
Abstract:
PURPOSE: A data transmission scheduling method is provided to maximally increase service quality and user know-how by efficiently using wireless resources. CONSTITUTION: A data receiving device presumes a channel state from a data transmitting device to a data receiving device(410). The data receiving device sets a plurality of buffers to have optimum states for buffers based on the channel state wherein data transmitted from the data transmitting device are buffered(420). The data receiving device controls transmission of each data based on the channel state to maintain the optimum states of the buffers(430,440). The optimum states are a ratio of time for which video information included in the buffered data is reproduced.