Sound generation and display control apparatus for personal digital assistant
DCFirst Claim
1. A sound generation and display control apparatus for a personal digital assistant, comprising:
- a central processing unit for controlling operations of a system;
a graphic and sound co-processor for processing graphic and sound data in accordance with a control of said central processing unit;
a memory for storing the graphic and sound data processed by said graphic and sound co-processor and for storing system data;
a direct memory access (DMA) controller for accessing the graphic data, the sound data and the system data stored in said memory;
a bus arbitrator and memory controller for arbitrating an allocation of a system bus and for controlling an access to the memory;
a sound generator for receiving the sound data outputted from the memory through said DMA controller and for generating a sound corresponding to the sound data; and
a display timing controller for receiving display data from the memory through the DMA controller and for processing the display data so as to display the display data on a display unit,wherein said graphic and sound co-processor includes,a graphic engine for generating the graphic data;
an arithmetic logic operator for executing an operation so as to generate the graphic data; and
a sound engine for generating the sound data, andwherein the display timing controller overlays the graphic data of the memory and video data externally input thereto.
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Accused Products
Abstract
An improved sound generation and display control apparatus for a personal digital assistant capable of improving the system thereof and a transmission performance for various kinds of display apparatuses and capable of editing an externally supplied video source and providing an overlay function, which includes a central processing unit for controlling the entire system so as to display stored data and to generate sound; a graphic and sound co-processor for processing graphic and sound data in accordance with a control of the central processing unit; a memory for storing the graphic and sound data processed by the graphic and sound co-processor and for storing system data; a direct memory access (DMA) controller for accessing the data stored in the memory in accordance with a DMA request; a bus arbitrator and memory controller for arbitrating an allocation of a system bus and for controlling an access to the memory and a refreshment of the memory; a sound generator for receiving the sound data outputted from the memory through the DMA controller and for generating a sound corresponding to the sound data applied thereto; and a display timing controller for receiving the display data outputted from the memory through the DMA controller and for processing the display data so as to display the data on a display member, thus providing a video overlay function and the capability of editing an externally applied video data, providing a single memory system, and enhancing the system operation performance.
48 Citations
19 Claims
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1. A sound generation and display control apparatus for a personal digital assistant, comprising:
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a central processing unit for controlling operations of a system; a graphic and sound co-processor for processing graphic and sound data in accordance with a control of said central processing unit; a memory for storing the graphic and sound data processed by said graphic and sound co-processor and for storing system data; a direct memory access (DMA) controller for accessing the graphic data, the sound data and the system data stored in said memory; a bus arbitrator and memory controller for arbitrating an allocation of a system bus and for controlling an access to the memory; a sound generator for receiving the sound data outputted from the memory through said DMA controller and for generating a sound corresponding to the sound data; and a display timing controller for receiving display data from the memory through the DMA controller and for processing the display data so as to display the display data on a display unit, wherein said graphic and sound co-processor includes, a graphic engine for generating the graphic data; an arithmetic logic operator for executing an operation so as to generate the graphic data; and a sound engine for generating the sound data, and wherein the display timing controller overlays the graphic data of the memory and video data externally input thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A sound generation and display control apparatus for a personal digital assistant, comprising:
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a central processing unit for controlling operations of a system; a graphic co-processor for processing graphic data in accordance with a control of said central processing unit; a memory for storing the graphic data processed by said graphic co-processor and storing system data; a bus arbitrator and memory controller for arbitrating an allocation of a system bus and for controlling an access to the memory; a video decoder for decoding an externally applied video source into a format suitable for a display unit; a video memory for storing data decoded by said video decoder; a display timing controller for processing the graphic data of said memory through a system bus and for overlaying the graphic data of the memory and the data outputted from said video memory and for displaying the overlayed data on said display unit; and a direct memory access (DMA) controller for accessing the graphic data stored in the memory under control of said display timing controller. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification