Stereo Video Decoder Synchronizes Left Right Fields
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Solution Overview
Problem
In the H.264 moving picture encoding system, stereo videos are decoded such that left and right pictures are often output at different times, preventing them from being visible as a stereo picture.
Innovation Solution
A method for decoding and encoding moving picture data that includes acquiring stereo information to determine if encoded pictures form a stereo pair, and synchronizing the output of corresponding left and right pictures based on this information, ensuring they are output simultaneously when identified as a stereo pair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stereo pictures are decoded according to the H.264 standard specifications, then the decoding process follows the standard timing rules, but the left and right pictures are output at different times preventing proper stereo display
Solution Approach 1:
The invention applies preliminary action by determining in advance whether the decoded pictures form a stereo picture pair using stereo information, and pre-establishing the corresponding relationship between left and right pictures. This allows the decoder to output both pictures simultaneously rather than following the standard sequential timing, thus resolving the timing mismatch while maintaining standard compliance.
2Ease of operation
If the decoder outputs pictures according to standard Picture Order Count timing, then the decoding follows standard specifications, but stereo pictures cannot be displayed correctly due to timing differences
Solution Approach 1:
The invention applies dynamics by making the output timing flexible rather than fixed. The decoder dynamically adjusts the output timing based on the determined corresponding relationship between left and right pictures. When a stereo pair is detected, both pictures are output simultaneously despite having different Picture Order Counts, thus achieving both standard compliance and correct stereo display.
3Productivity
If left and right pictures are decoded independently according to their respective timing, then the decoding process is simple and follows standard rules, but the output timing differs preventing stereo visualization
Solution Approach 1:
The invention applies merging by combining the output timing control of left and right pictures when they form a stereo pair. Instead of outputting them independently according to their separate timing schedules, the decoder merges their output timing to occur simultaneously, thus maintaining decoding efficiency while eliminating the timing offset that prevents stereo display.
Data Source
AI summary
A moving picture decoding method of an embodiment according to the present invention is a moving picture decoding method for decoding encoded data of an interlaced scanned picture including Top field and Bottom field, and the method includes a stereo information acquisition step for acquiring stereo information indicating whether Top field and Bottom field are two pictures forming a stereo picture from the encoded data, a decoding step for decoding two fields corresponding to each other from the encoded data and generating two decoded fields, and an output step for outputting the two decoded fields. In the output step, the stereo information is referred to and the two decoded fields are outputted simultaneously.