The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 16, 2014
Filed:
Apr. 30, 2009
Tomoo Nishigaki, Osaka, JP;
Tomoo Nishigaki, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A video recording apparatus compresses video data so that a bit rate converges to a target bit rate while keeping a minimum image quality and records the compressed video data. The video recording apparatus (exemplified by a recording and reproducing apparatus ()) comprises a compressing portion (exemplified by a transcoder ()) which compresses the 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 target bit rate; a recording portion which records the compressed data in a recording medium; and a total rate calculation portion that calculates a total bit rate of a result of compression of the video data by the compressing portion from the start of the compression to the present time. The compressing portion comprises a quantization step limiting portion which limits the changed quantization step to a predetermined upper limit lower than an upper limit changeable in the compressing portion, and a quantization step fixing portion which fixes the quantization step to the predetermined upper limit when the calculated total bit rate exceeds the target bit rate.