Encoding method, decoding method, encoding device, and decoding device

The embodiment of the invention provides a coding method, a decoding method, a coding device and a decoding device, and relates to the technical field of chips. According to the specific scheme, first depth information of a pixel point is obtained, wherein the first depth information comprises bits starting from a high bit in bits of original depth information of the pixel point, and the bit width of the bits is the encoding bit width of an encoder; encoding the first depth information to obtain a first depth code stream of the first depth information and reconstructed depth information of the first depth information; performing bit left shift operation on the bit of the reconstructed depth information to obtain second depth information, and obtaining a first bit difference value between the original depth information of the pixel point and the second depth information; bit width compression operation is carried out on the first bit difference value to obtain a second bit difference value, and the bit width of the second bit difference value is the coding bit width; and encoding the second bit difference value to obtain a second depth code stream, the second depth code stream being used for the decoder to obtain the original depth information of the pixel point in combination with the first depth code stream.