On Image Data Transfer over Voice Communication Channels1

摘要

Technology is developed based on the image representation by the dynamic spectrogram (sonogram) of a speech-like signal. The transmitted image data is precoded by bit swapping of coordinates of pixels of the original image (bit reverse) in order to reduce information redundancy and enhance the security of the transmitted image information. The transfer is carried out by progressive separation of the bit reversed image and conversion of each part into a sonogram for further transmission to the communication channel. The influence of the data transmission system on the image obtained by the recipient is found. Experimental results are presented.