Patent ID: 8670480
Filing Date: 2014-03-11
Classification: H04N

Abstract:
1. A transcoder comprising: a decoder that decodes an input image to generate a decoded image; and an encoder that encodes the decoded image to generate an output image, the output image including a predetermined image unit composed of a plurality of images, said encoder including: an upper limit rate setting part that sets an upper limit rate which is an upper limit value of an output rate: a target rate setting part that sets a target rate which is a target value of said output rate; a partial code amount comparison part that compares an amount of partially generated codes with an upper limit amount of partial codes, the amount of partially generated codes being an accumulated value of an output code amount of one or more of a plurality of types of pictures in a group of pictures (GOP) of an encoded image of the predetermined image unit that have already been encoded, the upper limit amount of partial codes being an accumulated value of each upper limit value of each of the plurality of types of pictures in the GOP that have already been encoded for the output code amount of the encoded image of the predetermined image unit; and a target rate resetting part that resets said target rate upon determination that said amount of partially generated codes exceeds said upper limit amount of partial codes, to thereby cause a generation rate after resetting said target rate not to exceed said upper limit rate.