公开(公告)号：US20120314773A1

公开(公告)日：2012-12-13

申请号：US13478695

申请日：2012-05-23

申请人： WALTER C. GISH ,  SAMIR HULYALKAR

发明人： WALTER C. GISH ,  SAMIR HULYALKAR

IPC分类号： H04N7/30 ,  H04N7/50

CPC分类号： H04N19/61 ,  H04N19/30

摘要： A visual dynamic range (VDR) signal and a standard dynamic range (SDR) signal are received. A first (e.g., MPEG-2) encoder encodes a base layer (BL) signal. A second encoder encodes an enhancement layer (EL). The EL signal represents information with which the VDR signal may be reconstructed, e.g., using the BL and the EL signals. The first encoder encodes the SDR signal with inverse discrete cosine transform (IDCT) coefficients that have a fixed precision, e.g., which represent fixed-point approximations of transform coefficients that may have arbitrary precisions. The BL signal is encoded in a stream that conforms with an Advanced Television Standards Committee (ATSC) standard. The EL is encoded in a stream that conforms with an ATSC enhanced vestigial sideband (E-VSB) standard. The BL and EL signals are combined; e.g., multiplexed, and transmitted together.

摘要翻译： 接收视觉动态范围（VDR）信号和标准动态范围（SDR）信号。 第一（例如，MPEG-2）编码器编码基本层（BL）信号。 第二编码器对增强层（EL）进行编码。 EL信号表示可以重构VDR信号的信息，例如使用BL和EL信号。 第一编码器用具有固定精度的反离散余弦变换（IDCT）系数对SDR信号进行编码，例如，其表示可能具有任意精度的变换系数的定点近似。 BL信号以符合高级电视标准委员会（ATSC）标准的流编码。 EL以符合ATSC增强残留边带（E-VSB）标准的流编码。 BL和EL信号组合; 例如，多路复用，并一起发送。