Patent ID: 8837918
Filing Date: 2014-09-16
Classification: G11B,H04N

Abstract:
1. A video recording apparatus having a compressing portion that compresses video data while executing a rate control including a change of a quantization step so that a bit rate in a predetermined period converges to a predetermined target bit rate, and a recording portion that records compression data compressed by the compressing portion in a recording medium, the video recording apparatus comprising: a total rate calculating portion that calculates a total bit rate that is a result of the compression of the video data by the compressing portion from the start of the compression until the present time, wherein the compressing portion includes: a quantization step limiting portion that limits the quantization step after the change so as not to exceed a predetermined upper limit that is lower than an upper limit changeable in the compressing portion; and a quantization step fixing portion that compares the total bit rate calculated by the total rate calculating portion and the predetermined target bit rate and fixes the quantization step to the predetermined upper limit when it is determined that the total bit rate is in excess of the predetermined target bit rate, wherein the fixing sets the quantization step to a value that prevents excess amount of memory to be used beyond an expected predetermined amount.