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, system and program for securing redundancy in parallel computing system
Handling errors in a data processing system
Mobile terminal device capable of more effectively utilizing operation portions, conductive portion, operation detecting unit, power supply unit, and signal processing unit
Synthesis of 8-amino boron dipyrromethenes having blue fluorescence
Antagonists of the glucagon receptor
Identifying a characteristic of an individual utilizing facial recognition and providing a display for the individual
Processor micro-architecture for compute, save or restore multiple registers, devices, systems, methods and processes of manufacture
  Randomly Featured Patents
Connector pin assembly and associated apparatus
Wheeled work machine
Process for the synthesis of high purity 3,5-diamino-6-(2,3-dichlorophenyl) (1,2,4-triazine)
Coupling fan
Pressure transducer with piezoelectric crystal for harsh environment use
Flow controlling
Portable rechargeable refrigerated cooler
Process for producing porous spherical polyvinyl chloride particles
Equine ambulance
Novel lipophilic muramyl peptides and processes for their manufacture