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. 26, 1995
Filed:
Mar. 26, 1993
Christophe D Vermeulen, Ramegnies-Chin, BE;
Frank O Van Der Putten, Lede, BE;
Bart F Voeten, Beerse, BE;
Alcatel N.V., Amsterdam, NL;
Abstract
A video decoder is proposed which receives packets of video information relating to moving video images from a packet switching network. The video decoder provides for the elimination of a great deal of hardware overhead and also provides for increased flexibility compared to prior art decoders by letting the decoding process, implemented via a decoder (DEC1, DEC2), run asynchronously with respect to the display process, implemented via a display (DIS). Moreover, and also in contrast with prior art decoders, the video decoder is not explicitly synchronized to its corresponding encoder by explicitly recovering the system clock of the encoder. This is realized through buffering actions within a frame store memory (FSM) placed between the decoder (DEC1, DEC2) and the display (DIS). The variable length of such a buffer can be used to control the speed of the display process in order to prevent underflow or overflow of the latter buffer and corresponding image degradation. The latter is done via a control device (CON).