Patent ID: 8199832
Filing Date: 2012-06-12
Classification: H04N

Abstract:
1. A video-signal switching apparatus, to which two video signals, video signals (A) and (B), are input, and from which the video signal switched from the video signal (A) to (B) at an arbitrary time is output, the video-signal switching apparatus, comprising: input stream buffers for temporarily accumulating the video signals (A) and (B); a first buffer analyzer for determining an encoded picture type after correction and a generated encoding amount after correction for a switch terminating measure, based on attribute information of a video signal acquired from a stream buffer of the video signal (A) before and after the switching; a second buffer analyzer for determining an encoded picture type after correction and a generated encoding amount after correction for a switch starting measure, based on attribute information of a video signal acquired from a stream buffer of the video signal (B) before and after the switching and final buffer-state information after the switch terminating measure obtained from the first buffer analyzer; a first video signal correcting processor for performing an information-amount correcting process of the video signal (A) by the encoded picture type and generated encoding amount after correction determined by the first buffer analyzer so as to output buffer-transition information after correction; a second video signal correcting processor for performing an information-amount correcting process of the video signal (B), by the encoded picture type and generated encoding amount after correction determined by the second buffer analyzer; and a switch for switching from the video signal (A) produced in the first video signal correcting processor to the video signal (B) produced in the second video signal correcting processor.