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US 2002/0120942 A1Published application
Apparatus for the decoding of video data in first and second formats
AssigneePace Micro Technology PLC.
InventorBen Avison
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AssigneePace Micro Technology PLC.
InventorBen Avison
Estimating the term…
The invention relates to the generation of video displays on a display screen from video data which is received as an encoded MPEG stream of data and then decoded and processed to be displayed. In the invention the video display can be generated in a conventional format or at least one use selectable alternative format, known as trick mode stream, such as a fast forward or fast cue display. The method of the invention allows the amount of data to be placed into the buffer memory prior to decoding and display of the data in the alternate format, to be calculated without reference to the MPEG stream information which is unavailable in the trick mode stream of data. The method therefore minimizes delay in the commencement and end of the display of the trick mode stream display format when selected by the user.
A method for generating and processing data for the display of a stream of video data on a display screen connected to data processing apparatus, said apparatus processing an MPEG compliant data stream of video data selected to be viewed by a user in a first format via said apparatus and said user provided with means to select to view the said video data in an altered format, said altered format generated by the apparatus and characterised in that, following the user selection of the altered format, the method includes the step of identifying the required level of data to be held in a buffer memory in the apparatus prior to decoding the first frame of video data for the alternative format.
A method of generating a video display in a first standard MPEG format and a second user selectable fast forward or fast cue format, said method involving the steps of, upon user selection of the fast forward or fast cue format, obtaining a value indicative of the separation of received encoded frames in the video data bitstream and using that value as a replacement value to indicate a required level of data to be held in a buffer memory device prior to the commencement of the decoding and display of the first frame of data for the fast forward or fast cue display.
Dependencies are inferred from the claim text.