IMPROVED ERROR CORRECTION CODING FOR RECOVERING MULTIPLE PACKETS IN A GROUP IN VIEW OF LIMITED BANDWIDTH
    11.
    发明申请
    IMPROVED ERROR CORRECTION CODING FOR RECOVERING MULTIPLE PACKETS IN A GROUP IN VIEW OF LIMITED BANDWIDTH 有权
    改进的一些组合中的多个分组的错误校正编码在有限带宽的视图

    公开(公告)号:US20130254620A1

    公开(公告)日:2013-09-26

    申请号:US13785859

    申请日:2013-03-05

    Applicant: Apple Inc.

    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。

    QUICK RELAY TRAFFIC MANAGEMENT FOR CLOUD MESSAGING

    公开(公告)号:US20210006627A1

    公开(公告)日:2021-01-07

    申请号:US17027639

    申请日:2020-09-21

    Applicant: Apple Inc.

    Abstract: A quick relay communication protocol is used by an initiating communication device (such as a wearable electronic device, e.g., a smart watch) and/or a recipient communication device (such as a companion electronic device to the wearable electronic device, e.g., a smart phone, a tablet computer or a laptop computer) to selectively communicate messages via different communication channels. Based on available connections and a communication constraint associated with a message, a processor executing a program module in an application layer in the initiating communication device provides transmission instructions to an interface circuit in the initiating communication device, which transmits a message to the recipient communication device based on the transmission instructions. When there are currently no available connections and the message is eligible to be communicated through a cloud-based relay server, the processor establishes a cloud-based connection with the recipient communication device via the relay server.

    MULTIWAY AUDIO-VIDEO CONFERENCING WITH MULTIPLE COMMUNICATION CHANNELS PER DEVICE

    公开(公告)号:US20190104281A1

    公开(公告)日:2019-04-04

    申请号:US16145038

    申请日:2018-09-27

    Applicant: Apple Inc.

    Abstract: A device implementing a system for multiway audio-video conferencing includes a processor configured to receive, from a first device, indication of a first channel and a second channel for communicating content for an audio-video conference session. The first channel and the second channel correspond to different types of communication interfaces. The processor is further configured to receive, from the first device, a first request to subscribe to a first content stream for the audio-video conference session via the first channel, and to subscribe to a second content stream for the audio-video conference session via the second channel, and in response to receiving the first request, forward, to the first device, the first content stream via the first channel.

    MULTI-DEVICE COMMUNICATION MANAGEMENT
    17.
    发明申请

    公开(公告)号:US20190103983A1

    公开(公告)日:2019-04-04

    申请号:US16145071

    申请日:2018-09-27

    Applicant: Apple Inc.

    Abstract: A device implementing the subject technology may include at least one processor configured to transmit an allocation request requesting allocation of a group communication session with a plurality of devices and receive an allocation response in response to the allocation request, the allocation response including credential information for the device to use to join the group communication session. The at least one processor may be further configured to transmit an allocation bind request with the credential information to join the group communication session using the credential information and receive an allocation bind success response in response to the allocation bind request, the allocation bind success response indicating that the device has joined the group communication session. The at least one processor may be further configured to provide a join notification to the plurality of devices via an intermediary device to notify that the device has joined the group communication session.

    QUICK RELAY SESSION MANAGEMENT PROTOCOL
    18.
    发明申请

    公开(公告)号:US20180091600A1

    公开(公告)日:2018-03-29

    申请号:US15713336

    申请日:2017-09-22

    Applicant: Apple Inc.

    Abstract: When direct communication between devices, such as via Bluetooth, is unavailable, a communication protocol is used by an initiating communication device and/or a recipient communication device to establish a communication session via a cloud-based relay server. This communication protocol efficiently allocates (or binds) the initiating communication device, the recipient communication device, and the relay server together for the communication session. The communication protocol may include handshaking messages that specify a transport type and channel used for connections in the communication session, as well as an address of the relay server. After the communication session is confirmed, the communication protocol allows the initiating communication device and the recipient communication device to share messages even when physically separated from each other.

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