Method, device and system of self-adaptive quantization and self-adaptive inverse quantization

The embodiment of the invention discloses a method, a device and a system of self-adaptive quantization and self-adaptive inverse quantization, belonging to the communication field. The self-adaptive quantization method comprises the following steps: determining an effective depth subspace of input depth data; and quantizing the effective depth subspace.The self-adaptive inverse quantization method comprises the following steps: determining an effective depth subspace inputting depth data; and inversely quantizing the effective depth subspace according to the received output depth data.The self-adaptive quantizer comprises an effective depth subspace determining module and a quantizing module.The self-adaptive inverse quantizer comprises an effective depth subspace determining module and an inverse quantizing module.The self-adaptive quantizing system comprises the self-adaptive quantizer and a transmitting module.The self-adaptive inverse quantizing system comprises a receiving module and the self-adaptive inverse quantizing module.The invention has the advantages of realizing self-adaptive quantizing and inverse quantizing according to the probability distribution characteristicof the input depth data, reducing quantizing error effectively and improving the quality of synthesized virtual images.