超量程信号表示溢出状况，可由最高有效位来确定是下溢还是上溢。
An out-of-range signal indicates an overflow condition, which can be used with the most significant bit to determine low or high overflow.
另一方面，对于视频序列中的第一隔行扫描视频帧，解码器解码第一隔行扫描视频帧的帧层处用信号表示的位平面。
In another aspect, for a first interlaced scanning video frame in a video sequence, a decoder decodes a bitplane signaled at frame layer for the first interlaced video frame.
超量程(otr)信号表示溢出状况，可由最高有效位来确定是下溢还是上溢。
An out-of-range signal (OTR) indicates an overflow condition which can be used with the most significant bit to determine low or high overflow.
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