公开(公告)号：US20140169454A1

公开(公告)日：2014-06-19

申请号：US14186938

申请日：2014-02-21

Applicant: BROADCOM CORPORATION

Inventor： Gheorghe BERBECEL ,  Xuemin CHEN

IPC: H04N19/115 ,  H04N19/176 ,  H04N19/146

CPC classification number: H04N19/0006 ,  H04N19/115 ,  H04N19/124 ,  H04N19/146 ,  H04N19/152 ,  H04N19/172 ,  H04N19/176 ,  H04N19/187 ,  H04N19/61 ,  H04N21/2365

Abstract: A video transmitter comprising a plurality of encoders may be operable to determine, for a transport stream, a constant overall number of bits per time interval corresponding to a frame in the transport stream. For each time interval corresponding to a start and an end of encoding of each of frames using each of the encoders, the video transmitter may allocate a target number of bits to each of the frames to achieve the constant overall number of bits. The allocation of the target number of bits may be based on frame types of the frames and CODEC types of the encoders, where the allocated target number of bits for each of the frames meets buffer overflow/underflow requirements associated with each of the encoders. A quantization parameter (QP) may be calculated and adjusted at each of one or more layers for generating an actual number of bits during encoding.

Abstract translation: 包括多个编码器的视频发射器可以用于为传输流确定对应于传输流中的帧的每个时间间隔的恒定总体位数。 对于使用每个编码器的每个帧的编码的开始和结束的每个时间间隔，视频发送器可以向每个帧分配目标比特数以实现恒定的总比特数。 目标位数的分配可以基于编码器的帧和CODEC类型的帧类型，其中每个帧的分配的目标位数满足与每个编码器相关联的缓冲器溢出/下溢要求。 可以在一个或多个层中的每一个处计算和调整量化参数（QP），以在编码期间生成实际的位数。

公开(公告)号：US20170118489A1

公开(公告)日：2017-04-27

申请号：US14930120

申请日：2015-11-02

Applicant: Broadcom Corporation

Inventor： Gheorghe BERBECEL ,  Richard Hayden Wyman

IPC: H04N19/593 ,  H04N19/61 ,  H04N19/80 ,  G06T5/00 ,  G09G5/02

CPC classification number: H04N19/593 ,  G09G5/02 ,  G09G2320/0271 ,  G09G2340/06 ,  G09G2360/16 ,  H04N19/117 ,  H04N19/154 ,  H04N19/186 ,  H04N19/59 ,  H04N19/61 ,  H04N19/80

Abstract: Compounding reproduction errors in the luminance of a pixel encoded by a non-constant luminance video encoder is High Dynamic Range (HDR) video content, which is starting to become more widely supported by commercially available display devices. HDR video content contains information that covers a wider luminance range than traditional, non-HDR video content known as Low Dynamic Range (LDR) video content. The present disclosure is directed to an apparatus and method for reducing errors in reproduced luminance of HDR video content (and other types of video content) at a video encoder and/or video decoder due to non-constant luminance video encoding.