公开(公告)号：US20130279585A1

公开(公告)日：2013-10-24

申请号：US13919674

申请日：2013-06-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiu SHEN ,  Qingpeng XIE ,  Dong ZHANG ,  Houqiang LI

IPC: H04N7/36

CPC classification number: H04N19/577 ,  H04N19/503 ,  H04N19/89

Abstract: Embodiments of the present invention disclose a method and an apparatus for detecting frame types. The method includes: detecting play time of each frame; and if the play time of a current frame is less than the maximum play time of received frames, determining the current frame as a bi-directional predicted frame, B-frame. In the technical solutions provided by the embodiments of the present invention, the frame types are determined according to a coding sequence of various frames and comparison between data amounts of various frames received earlier and later, without decoding a payload. Therefore the impact of a reduction factor is eliminated and the frame types can be detected more accurately.

Abstract translation: 本发明的实施例公开了一种用于检测帧类型的方法和装置。 该方法包括：检测每帧的播放时间; 如果当前帧的播放时间小于接收帧的最大播放时间，则将当前帧确定为双向预测帧B帧。 在本发明实施例提供的技术方案中，帧类型根据各种帧的编码顺序以及较早和稍后接收到的各种帧的数据量之间的比较来确定，而无需解码有效载荷。 因此，消除了减小因子的影响，并且可以更准确地检测帧类型。