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:
Jan. 15, 2013
Filed:
Dec. 15, 2008
Kazuhisa Yamagishi, Tokyo, JP;
Takanori Hayashi, Tokyo, JP;
Kazuhisa Yamagishi, Tokyo, JP;
Takanori Hayashi, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A packet loss frequency calculation unit () which counts, from an extracted packet loss pattern, packet losses generated in a predetermined interval representing the interval of a plurality of continuous IP packets as a packet loss of one time, thereby calculating the value as a packet loss frequency. The packet loss frequency calculation unit () also calculates a burst packet loss length representing the number of continuously lost packets from the packet loss pattern. An average burst packet loss length within a quality estimation interval is calculated from the burst packet loss length. A packet loss variation index calculation unit () derives a packet loss variation index from the average burst packet loss length. On the other hand, an encoding quality calculation unit () calculates an encoded video quality value based on the extracted encoding bit rate and frame rate. A video quality estimation unit () calculates a video quality value based on the encoded video quality value, packet loss frequency, and packet loss variation index. This allows to properly estimate the quality of a video in which a burst packet loss has occurred.