Patent ID: 8559503
Filing Date: 2013-10-15
Classification: H04N

Abstract:
1. A moving image coding method of coding an input image to generate a coded bit stream, and transmitting the coded bit stream through a transmission channel, said moving image coding method comprising: changing at least one of a resolution and a frame rate of the input image, according to a degree of difficulty in coding the input image, and outputting an image to be coded; coding the image outputted in said changing to generate the coded bit stream, and transmitting the coded bit stream through the transmission channel; determining a coding bit rate that is a bit rate of the coded bit stream transmitted through the transmission channel; and selecting a resolution range for determining an upper limit of a resolution of the image to be coded according to the coding bit rate determined in said determining, wherein, when the resolution of the image to be coded is to be increased, a new resolution is determined in said changing so that the resolution of the image to be coded does not exceed the upper limit determined in said selecting, wherein, in said selecting, a lower limit of the resolution of the image to be coded is determined according to the coding bit rate determined in said determining, such that the upper limit of the resolution of the image to be coded is a different value than the lower limit of the resolution of the image to be coded, and wherein, when the resolution of the image to be coded is to be decreased, the new resolution is determined in said changing so that the resolution of the image to be coded does not fall below the lower limit determined in said selecting.