Abstract:
A floppy disk drive controller interface is disclosed which is implemented in an integrated circuit. The controller connects to a host computer data bus and one or more floppy disk drives. Based upon clocking and control signals received from a digital computer, the controller generates serial encoded data for recording on a floppy disk and receives serial encoded data previously recorded on a floppy disk. The controller comprises read control means 45 including a read data register, write control means 47 including a write data register, a mode register 31, a status register 33, state latches 39, a decoder 41 and special function registers 35,37. The controller operates by the setting and clearing of the state latches and reading or writing the mode register, the status register, the special function registers, the read data register and the write data register. The setting of a state latch and accessing of a register is done simultaneously. The controller, under software control, operates in a synchronous or asynchronous read/write mode, and low or fast read/write mode.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and an apparatus for variable accuracy inter-picture timing specification for digital video encoding. SOLUTION: The present invention discloses a system that allows the relative timing of nearby video pictures to be encoded in a very efficient manner. In one embodiment, the display time difference between a current video picture (105) and a nearby video picture is determined. The display time difference is then encoded (180) into a digital representation of the video picture. In a preferred embodiment, the nearby video picture is the most recently transmitted stored picture. For coding efficiency, the display time difference may be encoded using a variable length coding system or arithmetic coding. In an alternate embodiment, the display time difference is encoded as a power of two to reduce the number of bits transmitted. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method which reproduces a drawing environment specified by a drawing application, as it is and uses less disk access and disk space to generate a graphic image without degrading its capabilities. SOLUTION: In a method of generating graphic images by using a set of graphics primitives in a computer having a memory system, contents of only a changed state element are saved in the memory system at each point of time when at least of a plurality of state elements is changed during a period from reception of a preceding command including graphics primitives to reception of a current command including graphic primitives, and graphics state objects including references indicating the latest saved contents of the plurality of state elements are saved in the memory system as states of a graphics environment for graphics primitives corresponding to the current command. COPYRIGHT: (C)2006,JPO&NCIPI