Deep-learning-based compression method using frequency decomposition

A method of video decoding, comprising:

• obtaining one or more latent representations in a latent space, wherein each of said one or more latent representations corresponds to a frequency group of one or more frequency groups, wherein a frequency group corresponds to a set of frequency bands;
• obtaining said one or more frequency groups from said one or more latent representations;
• and
• composing at least a part of an image from said one or more frequency groups by a plurality of frequency composition layers, wherein each frequency composition layer performs an intra frequency process and an inter frequency process.

An apparatus, comprising one or more processors and at least one memory coupled to said one or more processors, wherein said one or more processors are configured to:

• decompose at least a part of an image into a plurality of frequency groups by a plurality of decomposition layers, wherein each decomposition layer performs an intra frequency process and an inter frequency process, and wherein a frequency group corresponds to a set of frequency bands;
• generate a respective latent representation in a latent space for each frequency group of said plurality of frequency groups;
• and
• entropy encode one or more of said respective latent representations.

An apparatus, comprising one or more processors and at least one memory coupled to said one or more processors, wherein said one or more processors are configured to:

• obtain one or more latent representations in a latent space, wherein each of said one or more latent representations corresponds to a frequency group of one or more frequency groups, wherein a frequency group corresponds to a set of frequency bands;
• obtain said one or more frequency groups from said one or more latent representations;
• and
• compose at least a part of an image from said one or more frequency groups by a plurality of frequency composition layers, wherein each frequency composition layer performs an intra frequency process and an inter frequency process.