The matrix is padded with padding bits based on a particular padding scheme to support variable frame rates.

该矩阵基于特定填充方案用填充比特填充以支持可变帧速率。

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For example, if the block length is 64 bits and the last block contains only 40 bits, 24 bits of padding are added. see the.

例如，如果块长度为64位，而最后的块只包含40位，则会添加24位的填充字元串。

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For example, if the block length is 64 bits and the last block contains only 40 bits, 24 bits of padding are added.

举例来讲，如果区块长度为64位元，而最后一个区块只有40位元，那么就会加入24位元的填补。

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