Video encoding method and device, video decoding method and device and computer storage medium
A video decoding and computer technology, which is applied in the field of information processing, can solve the problems of complex encoding and decoding process, unfavorable bandwidth saving, etc., and achieve the effect of reducing complexity, saving bandwidth and improving efficiency
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Embodiment 1
[0239] This embodiment proposes a low-delay uni-predictive coding structure in video decoding. When using this low-delay uni-predictive coding structure for encoding, only the pictures in the reference queue 0 are used in the inter-frame prediction and the pictures in the reference queue 0 do not contain the (future) reference pictures whose display order is after the current picture, so There is no image rearrangement delay, and the method is used to predict images, which are called LP images. If the low-latency unipredictive coding structure is used, the first decoded picture after the sequence header is an I picture, and the pictures after the I picture are all LP pictures. If there is a random access point, an I picture is inserted at the random access point , the following is an example of the application of the low-delay uni-predictive coding structure.
example 1
[0240] Example 1: I LP LP LP LP LP LP LP LP LP...
[0241]
[0242] Add the syntax element low_delay_p in the sequence header. Part of the syntax in the prediction header is shown in Table 1-5. Table 1-5 only defines the syntax for some sequence headers related to the present invention, and the parsing process of the remaining syntax elements It does not need to be reflected in this table. Part of the syntax in the inter-prediction image header is shown in Table 1-6. The syntax in Table 1-6 is only part of the inter-prediction image header syntax related to the present invention, and the parsing process of other syntax elements does not need to be reflected in this table. .
[0243] The identification of the corresponding syntax elements in Table 1-5 and Table 1-6 can also use other representation methods, which will not be described in detail here.
[0244] The decoder operates as follows:
[0245] According to Table 1-5 and Table 1-6, the decoder obtains sequence and i...
Embodiment 2
[0287] The parsing method of low_delay_p in the sequence header can also be the method in Table 1-5, and the decoder performs the following operations:
[0288] 1) The analysis method of low_delay_p in the sequence header
[0289] The grammar elements are parsed according to the grammar in Table 1-5, and Table 1-8 is just an example.
[0290] First, parse the value of low_delay from the bitstream.
[0291] Secondly, if low_delay is 1, low_delay_p is parsed; if low_delay is 0, low_delay_p is not parsed, and the default low_delay_p value is 0, that is, when the low-delay coding structure is not used, the low-delay single-predictive coding structure is not used.
[0292] 2) When low_delay_p is 1, construct the syntax analysis process of the reference image configuration set.
[0293] Same as the method in Example 1.
[0294] 3) When low_delay_p is 1, the CU-level syntax parsing process
[0295] Same as the method in Example 1.
[0296] Table 1-8
[0297]
[0298] Compare...
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