公开(公告)号：US08683301B2

公开(公告)日：2014-03-25

申请号：US13785859

申请日：2013-03-05

Applicant: Apple Inc.

Inventor： Xiaosong Zhou ,  Hyeonkuk Jeong ,  Yan Yang ,  Dazhong Zhang ,  Hsi-Jung Wu

IPC: H03M13/00

CPC classification number: H03M13/05 ,  H03M13/1102 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/27 ,  H03M13/29 ,  H03M13/2957 ,  H03M13/373 ,  H03M13/3746 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/008

Abstract: Coded video data may be transmitted between an encoder and a decoder using multiple FEC codes and/or packets for error detection and correction. Only a subset of the FEC packets need be transmitted between the encoder and decoder. The FEC packets of each FEC group may take, as inputs, data packets of a current FEC group and also an untransmitted FEC packet of a preceding FEC group. Due to relationships among the FEC packets, when transmission errors arise and data packets are lost, there remain opportunities for a decoder to recover lost data packets from earlier-received FEC groups when later-received FEC groups are decoded. This opportunity to recover data packets from earlier FEC groups may be useful in video coding and other systems, in which later-received data often cannot be decoded unless earlier-received data is decoded properly.

Abstract translation: 可以在编码器和解码器之间使用多个用于错误检测和校正的FEC码和/或包进行编码的视频数据。 只有FEC数据包的一部分需要在编码器和解码器之间传输。 每个FEC组的FEC分组可以采用当前FEC组的数据分组和前一个FEC组的未发送FEC分组的输入。 由于FEC分组之间的关系，当传输错误出现并且数据分组丢失时，当稍后接收的FEC组被解码时，解码器仍然有机会恢复来自早先接收的FEC组的丢失的数据分组。 从先前的FEC组恢复数据分组的机会在视频编码和其他系统中可能是有用的，其中后期接收的数据通常不能被解码，除非先前接收到的数据被正确解码。

公开(公告)号：US20140068084A1

公开(公告)日：2014-03-06

申请号：US14018348

申请日：2013-09-04

Applicant: Apple Inc.

Inventor： Yan Yang ,  Sundararaman V. Shiva ,  Roberto Garcia ,  Joe S. Abuan ,  Hyeonkuk Jeong ,  James O. Normile

IPC: H04L12/923

CPC classification number: H04L47/762 ,  H04L47/2475 ,  H04L47/32 ,  H04L47/34 ,  H04L47/564 ,  H04L67/145 ,  H04L69/00 ,  H04W36/00

Abstract: A method for detecting and recovering from a transmission channel change during a streaming media session is disclosed. The method can include a wireless communication device detecting a stall condition resulting from a transmission channel change. The method can further include the wireless communication device capturing a snapshot of a current transmission parameter state of the streaming media session in response to detecting the stall condition. The method can also include the wireless communication device using the snapshot to restore the streaming media session to the transmission parameter state captured by the snapshot following completion of the transmission channel change.

Abstract translation: 公开了一种在流媒体会话期间从传输信道进行检测和恢复的方法的改变。 该方法可以包括检测由传输信道改变导致的停顿状态的无线通信设备。 响应于检测到失速状态，该方法还可以包括无线通信设备捕获流媒体会话的当前传输参数状态的快照。 该方法还可以包括使用快照的无线通信设备将流媒体会话恢复到完成传输信道改变之后由快照捕获的传输参数状态。