Resources Contact Us Home
Method for run-length encoding of a bitmap data stream

Image Number 5 for United States Patent #7657109.

Subtitling aims at the presentation of text information and graphical data, encoded as pixel bitmaps. The size of subtitle bitmaps may exceed video frame dimensions, so that only portions are displayed at a time. The bitmaps are a separate layer lying above the video, e.g. for synchronized video subtitles, animations and navigation menus, and therefore contain many transparent pixels. An advanced adaptation for bitmap encoding for HDTV, e.g. 1920.times.1280 pixels per frame as defined for the Blu-ray Disc Prerecorded format, providing optimized compression results for such subtitling bitmaps, is achieved by a four-stage run length encoding. Shorter or longer sequences of pixels of a preferred color, e.g. transparent, are encoded using the second or third shortest code words, while single pixels of different color are encoded using the shortest code words, and sequences of pixels of equal color use the third or fourth shortest code words.

  Recently Added Patents
Method and apparatus for diagnosing faults in a hybrid internet protocol network
Systems and methods for archiving and retrieving navigation points in a voice command platform
Navigational cube for matching vendor offerings to service provider requirements
System and methods for obstacle mapping and navigation
Nitride semiconductor laser device
Image processing apparatus and image processing method
Method for increasing expression of active tumor necrosis factor receptor family member-Ig fusion proteins
  Randomly Featured Patents
Surface plasmon resonance detector having collector for eluted ligate
Motor fuel
System for improving shape-based targeting by using interest level data
Potassium bromate replacer composition
Antibodies that specifically bind ACT-4-L-h-1 ligand
Dynamic frequency hopping
4-amino-5H-pyrrolo[3,2-d]pyrimidine inhibitors of nucleoside phosphorylases and nucleosidases
Antiskid tire chain
Recording apparatus utilizing small optical components