基于全相位双正交变换的MPEG-4简单档次编码方法和装置

• Format: Patent
• Language: Chinese
• Published: 12.04.2017
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

本发明涉及种基于全相位双正交变换的MPEG-4简单档次编码方法和装置，其解决了现有MPEG-4视频压缩方法在重建视频块边界处存在明显的块效应、量化表复杂且需要较大存储空间、改变压缩率时需要大量计算的技术问题，其包括Ｉ帧编码和Ｐ帧编码，Ｉ帧编码是用全相位双正交变换代替现有的二维离散余弦变换，对所有变换系数采用均量化。本发明广泛用于视频压缩技术领域。 The invention relates to an MPEG-4 single grade encoding method and a device based on all phase position biorthogonal transform, and aims at solving the technical problems that a conventional MPEG-4 video compression method has a remarkable blocking effect at a reconstructed video block boundary, a quantization table is complex, a larger storage space is required and a great deal of calculation is required when the compression rate is changed. The method comprises encoding a frame I and encoding a frame P, wherein in the step of encoding the frame I, the all phase position biorthogonal transform is adopted to replace conventional two-dimensional discrete cosine transform, and all transform coefficients are uniformly quantified. The method and the device are widely applied to the technical field of video compression.