摘要:
A graphics integrated circuit chip is used in a set-top box for controlling a television display. The graphics chip processes analog video input, digital video input, and graphics input. The chip includes a single polyphase filter that preferably provides both anti-flutter filtering and scaling of graphics. Anti-flutter filtering may help reduce display flicker due to the interlaced nature of television displays. The scaling of graphics may be used to convert the normally square pixel aspect ratio of graphics to the normally rectangular pixel aspect ratio of video.
摘要:
A video and graphics system on an integrated circuit chip includes an integrated system bridge controller to interface a CPU with devices internal to the system as well as external peripheral devices. The system bridge controller is capable of performing format conversion between big-endian data and little-endian data. The system bridge controller includes a PCI bridge to interface with PCI devices, an I/O bus bridge to interface with I/O devices such as RAM, ROM, flash memory and 68000-compatible peripheral devices, and a CPU interface block to interface the CPU to video processing devices on the integrated circuit chip such as an MPEG video decoder.
摘要:
A graphics integrated circuit chip is used in a set-top box for controlling a television display. The graphics chip processes analog video input, digital video input, a graphics input and an audio input simultaneously. The chip processes graphics images organized as windows. The chip obtains data that describes the windows, sorts the data according to the depth of the window on the display, transfers graphics images from memory, and blends the graphics images using alpha values associated with the graphics images.
摘要:
A graphics integrated circuit chip is used in a set-top box for controlling a television display. The graphics chip processes analog video input, digital video input, a graphics input and an audio input simultaneously. The chip processes graphics images organized as windows. The chip obtains data that describes the windows, sorts the data according to the depth of the window on the display, transfers graphics images from memory, and blends the graphics images using alpha values associated with the graphics images.
摘要:
A data distribution device includes a pair of first storage units, a second storage unit which includes a dual-port memory, a write unit which repeatedly writes drive data into one of the pair of first storage units and thereafter writes the remaining drive data and a read output unit which outputs the respective concurrently read drive data to the k corresponding drive circuits concurrently, where read addresses read from the dual-port memory are not overtaken by write addresses written to the dual-port memory during the period in which reading and writing of the drive data are being simultaneously performed with respect to the dual-port memory of the second storage unit.
摘要:
Set-up, write, sustain and erase pulses are variously applied to a plasma display panel using a staircase waveform in which the rising or falling portion is in at least two steps. These staircase waveforms can be realized by adding at least two pulses. Use of such waveforms for the set-up, write and erase pulses improves contrast, and use for the sustain pulses reduces screen flicker and improves luminous efficiency. This is of particular use in driving high definition plasma display panels to achieve high image quality and high luminance.
摘要:
A graphics integrated circuit chip is used in a set-top box for controlling a television display. The graphics chip processes analog video input, digital video input, and graphics input. The chip includes a single polyphase filter that preferably provides both anti-flutter filtering and scaling of graphics. Anti-flutter filtering may help reduce display flicker due to the interlaced nature of television displays. The scaling of graphics may be used to convert the normally square pixel aspect ratio of graphics to the normally rectangular pixel aspect ratio of video.
摘要:
A microprocessor executes at 100 native MIPS peak performance with a 100-MHz internal clock frequency. Central processing unit (CPU) instruction sets are hardwired, allowing most instructions to execute in a single cycle. A “flow-through” design allows the next instruction to start before the prior instruction completes, thus increasing performance. A microprocessing unit (MPU) contains 52 general-purpose registers, including 16 global data registers, an index register, a count register, a 16-deep addressable register/return stack, and an 18-deep operand stack. Both stacks contain an index register in the top elements, are cached on chip, and when required, automatically spill to and refill from external memory. The stacks minimize the data movement and also minimize memory access during procedure calls, parameter passing, and variable assignments. Additionally, the MPU contains a mode/status register and 41 locally addressed registers for I/O, control, configuration, and status. The CPU contains both a high-performance, zero-operand, dual-stack architecture MPU, and an input-output processor (IOP) that executes instructions to transfer data, count events, measure time, and perform other timing-dependent functions. A zero-operand stack architecture eliminates operand bits. Stacks also minimize register saves and loads within and across procedures, thus allowing shorter instruction sequences and faster-running code. Instructions are simple to decode and execute, allowing the MPU and IOP to issue and complete instructions in a single clock cycle—each at 100 native MIPS peak execution. Using 8-bit opcodes, the CPU obtains up to four instructions from memory each time an instruction fetch or pre-fetch is performed. These instructions can be repeated without rereading them from memory. This maintains high performance when connected directly to DRAM, without a cache.
摘要:
A method for accessing a frame memory integrated within a display panel driver driving a display panel is composed of serially performing write operations for writing sub-field data of a pixel line within the display panel for a plurality of sub-fields into the frame memory, and serially performing read operations for reading sub-field data of a plurality of pixel lines for a sub-field from the frame memory. At least two of the write operations are allowed to be performed between adjacent two of the read operations.
摘要:
A video display apparatus and method capable of providing, even if an on-screen display device that operates only on a clock lower in speed than a dot clock synchronized with a video signal is used, high-definition on-screen display based on the dot clock. Based on a signal outputted from a control signal generator 1, a line memory 3 writes the on-screen signal outputted from an OSD generator 2 on a clock (CK2) lower in speed than the dot clock of the video signal, and reads the same on a clock (CK1) synchronized with the dot clock of the video signal. A switching part 4 inserts the on-screen signal synchronized with the dot clock of the video signal outputted from the line memory 3 into a predetermined period of the video signal by selectively switching outputs.