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    • 2. 发明申请
    • FEEDBACK BASED SCALABLE VIDEO CODING
    • 基于反馈的可扩展视频编码
    • WO2008126059A3
    • 2009-02-05
    • PCT/IB2008051449
    • 2008-04-15
    • NOKIA CORPNOKIA INCHANNUKSELA MISKAWANG YE-KUI
    • HANNUKSELA MISKAWANG YE-KUI
    • H04N7/50H04L1/16H04N7/66
    • H04L1/0061H04L1/1671H04N19/30H04N19/34H04N19/61H04N19/70
    • A system and method provides a first integrity check code that can be calculated at an encoder and then sent to a decoder as a supplemental enhancement information message. The decoder can then calculate a second integrity check code over the actual received network abstraction layer units. This second integrity check code can be compared with the encoder-generated first integrity check code sent via the supplemental enhancement information message to indicate if in fact all of the transmitted NAL units from which the integrity check code was generated have been received without changes in their content. In addition, an error tracking algorithm is provided that can be run at either the encoder or the decoder in order to determine if the network abstraction layer units are correct in content at the decoder level. Therefore, pictures that are sent as just intra coded frames and pictures that are sent as just inter coded frames can both be checked for errors. Hence, error checking can be provided in those situations where the decoder fails to provide adequate information to the encoder as to what has actually been decoded.
    • 系统和方法提供可以在编码器处计算的第一完整性校验码,然后作为补充增强信息消息发送到解码器。 然后,解码器可以在实际接收的网络抽象层单元上计算第二完整性校验码。 该第二完整性校验码可以与通过补充增强信息消息发送的编码器生成的第一完整性校验码进行比较,以指示是否已经接收到从其产生完整性校验码的所有发送的NAL单元,而不改变它们 内容。 另外,提供了可以在编码器或解码器处运行的误差跟踪算法,以便确定网络抽象层单元在解码器级别的内容是否正确。 因此,作为仅帧内编码帧发送的图像和仅作为帧间编码帧发送的图像可以被检查错误。 因此,在解码器无法向编码器提供关于实际解码的信息的情况下,可以提供错误检查。
    • 6. 发明申请
    • SIGNALING OF MULTIPLE DECODING TIMES IN MEDIA FILES
    • 在媒体文件中传送多个解码时间
    • WO2008129516A4
    • 2009-08-13
    • PCT/IB2008051567
    • 2008-04-23
    • NOKIA CORPNOKIA INCWANG YE-KUIHANNUKSELA MISKA
    • WANG YE-KUIHANNUKSELA MISKA
    • H04N7/26H04N7/24
    • H04N7/50H04N19/127H04N19/136H04N19/172H04N19/174H04N19/44H04N19/46H04N19/61H04N21/234327H04N21/234381H04N21/4382H04N21/4621H04N21/64707H04N21/8455H04N21/8547
    • The exemplary embodiments of this invention provide in one aspect thereof an ability to signal multiple decoding times for each sample in a file format level in order to allow, for example, different decoding times for each sample (or sample subset) between decoding an entire stream and decoding a subset of the stream. An alternate decoding time box is specified to allow for the signaling of multiple decoding times for each sample. Such a box can contain a compact version of a table that allows indexing from an alternate decoding time to a sample number, where an alternate decoding time is a decoding time to be used with a sample when only a subset of an elementary stream stored in a track is to be decoded. Furthermore, each entry in the table provides the number of consecutive samples with the same time delta, and the delta between those consecutive samples. By adding the deltas a complete time-to-sample map can be constructed.
    • 本发明的示例性实施例在其一个方面中提供了以文件格式级别用信号通知每个样本的多个解码时间的能力,以便允许例如在解码整个流之间的每个样本(或样本子集)的不同解码时间 和解码流的子集。 指定备选解码时间框以允许用于每个样本的多个解码时间的信令。 这种盒子可以包含表格的紧凑版本,该表格允许从备选解码时间到样本编号的索引,其中当只有存储在一个基本流中的一个基本流的子集时,备用解码时间是与样本一起使用的解码时间 轨道将被解码。 此外,表中的每个条目都提供了具有相同时间增量的连续样本数以及这些连续样本之间的增量。 通过添加deltas,可以构建一个完整的时间 - 样本地图。