Transcoded images for improved trick play
AssigneeThomson Licensing
InventorJill MacDonald Boyce
Life of this patent
Estimating the term…
Abstract
A method and apparatus are provided for facilitating processing of images contained in an encoded video stream wherein a plurality of non-intra coded images are transcoded into intra-coded images (I-images). The transcoded I-images are then used to facilitate trick mode playback, such as reverse playback, fast reverse playback or fast forward playback. In addition, an image sequence window is defined and transcoded I-images which fall outside of the image sequence window are deleted from a memory.
Claims18
A method for facilitating processing of images for trick play contained in an encoded video stream comprising:
- transcoding a plurality of non-intra coded images into intra-coded images (I-images);
- storing a plurality of said transcoded I-images on a data storage;
- after said storing, defining a sliding image sequence window containing a plurality of recently transcoded I-images, said sliding image sequence window tracking normal playback of said encoded video stream;
- and
- storing only transcoded I-images which fall within said sliding image sequence window by deleting, from said data storage, ones of said stored transcoded I-images which fall outside said sliding image sequence window.
An apparatus for facilitating processing of images for trick play contained in an encoded video stream comprising:
- an encoder for transcoding a plurality of non-intra coded images into intra- coded images (I-images);
- a data storage means for storing a plurality of said transcoded I-images;
- after said storing, a processor for defining a sliding image sequence window containing a plurality of recently transcoded I-images, said sliding image sequence window tracking normal playback of said encoded video stream;
- and
- said processor for deleting, from said data storage means, ones of said stored transcoded I-images which fall outside said sliding image sequence window to thereby store only transcoded I-images which fall within said sliding image sequence window.
Dependencies are inferred from the claim text.