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2D + offset extensions to the Blu-ray Disc graphics composition segment Disclosure Number: IPCOM000186500D
Publication Date: 2009-Aug-24
Document File: 8 page(s) / 932K

Publishing Venue

The Prior Art Database



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2D + offset extensions to the Blu-ray Disc graphics composition segment


    One of main content delivery platforms is Blu-ray Disc. Blu-ray Disc was designed for publishing movies in High definition and in addition provides a long list of features to allow the end-user to interact with the content, for simple gaming etc. Current advances in display technology are making it possible to introduce 3D video for a mass market audience. Therefore to enable widespread distribution of 3D content the Blu-ray disc standard should be extended to allow storage and playback of 3D content.

    3D content requires significantly more storage, bandwidth and processing as compared to 2D content. Because of this solutions are being investigated that provide a 3D experience with a minimum of additional cost and that is compatible with the current install base of 2D Blu-ray Disc players. One of the solutions being investigated is to extend existing advanced Blu-ray Disc players to allow them to playback 3D by applying an offset or disparity shift to a 2D picture.

    This works by placing a sliding window over the 2D picture and moving it in a horizontal direction, a cropped version of the original 2D image is then used for example for the right eye the displaced version of the image is used for the left eye or vice versa.

    Figure 100 shows an 2D image, as a representation of a frame in a film. Figure 101 shows a sliding window frame, that is applied to the image. This results in Figure 102 that is the image from figure 100 but cropped on the right side. This image is used for the one eye. Then a similar operation is done for the other eye but with the sliding window moved to the right by the aforementioned offset factor as shown in figure 103. Cropping is then applied and the result is shown in Figure 104.

    Applying such an approach to the video and a method for carrying this offset information on the Disc in the CPI information is described in ID672854

    However the same principle can be applied to the graphics system in Blu-ray Disc. The Blu-ray Disc standard allows for advanced graphics that can be used for applications ranging from simple menu's to graphically advanced games. There are several ways of extending such a graphics system for 3D. One approach is to duplicate the graphics processing pipeline for any additional views. For stereoscopic based 3D video this means you need a dual pipeline graphics decoder model. Such a model requires a high performance graphics processing chip as the graphics will typically contain high resolution image.

Another model is to adopt a dedicated 3D graphics language and related system that is based not on using pre-rendered high definition images, but rather is based on vector graphics. Examples of these are OpenGL and Direct3D. These however require a new chip design of the system on-a...