Resources Contact Us Home
Digital versatile disc playback system with efficient modification of subpicture data

Image Number 6 for United States Patent #6313850.

In a display system having a predefined number, n, of pixel types, a display processor, such as a digital versatile disc (DVD) display processor, includes a color palette which can store more than n color/contrast values and a subpicture bitmap composed of subpicture pixel values, each of which corresponds to one of the n pixel types. In a DVD display system, for example, the DVD subpicture pixel types are: Background, Pattern, Emphasis 1, and Emphasis 2. Each subpicture pixel value is, in turn, related to a color/contrast combination by the color palette, with each pixel value corresponding to the address of a palette location. The corresponding palette location contains the color/contrast value for the related subpicture pixel type. To modify the color/contrast value of a selected group of the pixels having one of the four DVD subpicture pixel types, the display processor updates the color palette, associating new color/contrast values with previously "unused" palette locations. Additionally, pixel values within the bitmap locations which are to have their color/contrast values changed are modified to correspond to the address of the color palette location containing the "new" color/contrast value. The display processor sends the updated color palette and bitmap to a video processor which combines the color palette information, bitmap information and video information to create a subpicture display which reflects the updated color/contrast values.

  Recently Added Patents
Stateless challenge-response broadcast protocol
Generator system for recovering vehicle and resident wasted energy
System and method for channel interpolation
RF safe transformer-coupled transmission line for MRI with reduced artifacts
Method for treating artemia cysts
Wireless communication system, base station apparatus, mobile station apparatus, and wireless communication method
  Randomly Featured Patents
Glass production method using ilmenite
Detecting an unstable input to an IC
Snack food container cap
Group B Streptococcus antigens and vaccines
Substituted heterocyclic compounds, method for preparing and compositions containing same
Apparatus for measuring weight, torque and side force on a drill bit
Method of automotive electrical bus management
Teaching aid for CPR
Cardiac sense amplifier with pattern recognition capabilities
Device and method for inspection and detection of a material by observing a high-voltage waveform produced by that material