Data encoding method and apparatus, data decoding method and apparatus, computer device, and storage medium for efficient feature data processing

A data decoding method, performed by a computer device, comprising:

• obtaining auxiliary encoding information corresponding to an encoded data stream, the encoded data stream being obtained by encoding a subject of feature elements selected from feature data based on the auxiliary encoding information;
• determining, based on the auxiliary encoding information, scale parameter values corresponding to feature elements in the feature data;
• performing quantization processing on scale parameter values;
• obtaining scale parameter quantization values corresponding to scale parameter values;
• selecting a subset of scale parameter quantization values from the scale parameter quantization values based on a preset selecting condition, a selected scale parameter quantization value being greater than an unselected scale parameter quantization value;
• performing entropy decoding on the encoded data stream based on the selected subset of the scale parameter quantization values, and obtaining corresponding feature elements;
• determining, based on the unselected scale parameter quantization values, positions of feature elements in the feature data on which entropy encoding is not performed;
• determining replacement elements for the positions of feature elements on which entropy encoding is not performed;
• and
• combining the feature elements obtained through entropy decoding and the replacement element and obtaining restored feature data.

A data encoding apparatus, comprising:

• at least one memory configured to store program code;
• and
• at least one processor configured to read the program code and operate as instructed by the program code, the program code comprising:
• obtaining code configured to cause at least one of the at least one processor to obtain auxiliary encoding information of feature data;
• determining code configured to cause at least one of the at least one processor to determine, based on the auxiliary encoding information, scale parameter values corresponding to feature elements in the feature data;
• quantization code configured to cause at least one of the at least one processor to perform quantization processing on the scale parameter values;
• value obtaining code configured to cause at least one of the at least one processor to obtain scale parameter quantization values corresponding to the scale parameter values;
• selecting code configured to cause at least one of the at least one processor to select, based on a preset selecting condition, a subset of the scale parameter quantization values from the scale parameter quantization values, a selected scale parameter quantization value being greater than an unselected scale parameter quantization value;
• extracting code configured to cause at least one of the at least one processor to extract, from the feature elements in the feature data, a first subset of the feature elements corresponding to the selected subset of the scale parameter quantization values;
• encoding code configured to cause at least one of the at least one processor to perform entropy encoding on the first subset of the feature elements based on the selected subset of the scale parameter quantization values;
• data obtaining code configured to cause at least one of the at least one processor to obtain encoded data corresponding to the first subset of the feature element;
• and
• stream determining code configured to cause at least one of the at least one processor to determine an encoded data stream of the feature data based on the encoded data.