H.264/SVC video transmitting method in 22MIMO system on basis of HQAM

The invention discloses an H.264/SVC video transmitting method in a 2*2MIMO system on the basis of HQAM and belongs to the technical field of wireless multimedia communication. The method is fully combined with the feature of the HQAM technology and the feature of the MIMO technology, SVD decomposition is carried out on an MIMO channel to obtain an HP sub-channel and an LP sub-channel which are different in quality, importance of different quality layers is ranked according to contribution of the different quality layers of SVC code streams to the restoration quality of videos, data of a basic layer and data of a first MGS layer are classified as HP data, data of a second GMS layer and data of a third MGS layer are classified as LP data, and the HP data and the LP data are mapped into different HQAM symbols respectively; for channel SNR values, HQAM modulation parameter values enabling the data of the basic layer to be smaller than a safety threshold are selected, and finally video transmission is optimized.