公开(公告)号：US5157385A

公开(公告)日：1992-10-20

申请号：US601869

申请日：1990-10-23

申请人： Hayato Nakao ,  Takeshi Shibamoto ,  Masahiro Araoka

发明人： Hayato Nakao ,  Takeshi Shibamoto ,  Masahiro Araoka

IPC分类号： G06T15/40 ,  G09G5/391 ,  G09G5/393

CPC分类号： G09G5/391 ,  G06T15/503 ,  G09G5/393

摘要： A jagged-edge killer circuit for a three-dimensional display, comprises a frame buffer for storing data of each pixel on the display screen by a pixel unit; a Z-buffer for storing distance data in a depth direction of a picture by a sub-pixel unit into which the pixel as a storage unit of the frame buffer is subdivided in a predetermined number; a picture data buffer for storing picture data by the sub-pixel unit; an element for comparing the distance data stored in the Z-buffer with new distance data in the depth direction about each new sub-pixel into which new pixel is subdivided in the predetermined number when picture data of said new pixel are written in the picture data buffer; a first element for renewing storage contents of the picture data buffer about only sub-pixel having nearer distance in the depth direction within the sub-pixels subdivided from the new pixel into the predetermined number on the basis of a comparison result of the comparing element; a second element for renewing storage contents of the Z-buffer by the new distance data of the sub-pixels having the predetermined number corresponding to the new pixel; and an element for generating picture data of the pixel unit in the frame buffer by performing an arithmetical mean of the picture data of the sub-pixel unit having the predetermined number in the picture data buffer.

摘要翻译： 用于三维显示器的锯齿状边缘杀手电路包括：帧缓冲器，用于通过像素单元在显示屏幕上存储每个像素的数据; Z缓冲器，用于通过子像素单元存储在图像的深度方向上的距离数据，作为帧缓冲器的存储单元的像素被细分成预定数量; 用于通过子像素单元存储图像数据的图像数据缓冲器; 用于将存储在Z缓冲器中的距离数据与新的像素的深度方向上的新距离数据相对应的元素，当新图像数据的图像数据被写入图像数据时，新的像素被划分成预定数量的元素 缓冲; 第一元件，用于基于比较元素的比较结果，将图像数据缓冲器的存储内容的更新仅关于在从新像素分割为预定数量的子像素内的深度方向上具有更近距离的子像素; 用于通过对应于新像素的具有预定数量的子像素的新距离数据来更新Z缓冲器的存储内容的第二元件; 以及用于通过在图像数据缓冲器中执行具有预定数目的子像素单元的图像数据的算术平均值来生成帧缓冲器中的像素单元的图像数据的元件。

公开(公告)号：US06618446B1

公开(公告)日：2003-09-09

申请号：US09449635

申请日：1999-11-30

申请人： Hayato Nakao

发明人： Hayato Nakao

IPC分类号： H04B166

CPC分类号： H04N19/42 ,  H04N19/44

摘要： Original data is reconstructed from an MPEG (Moving Picture Experts Group) bitstream including at least one elementary layer bitstream. The elementary layer bitstream is made of an upper layer bitstream and a plurality of lower layer bitstreams that follow the upper layer bitstream. A start code added to a header of the MPEG bitstream is detected to generate a start code detection signal. Control packets are generated when it is judged, in response to the detection signal, that the detected start code is added to the header of the upper layer bitstream. The control packets carry information on reconstruction of the original data that has been coded into the lower layer bitstreams. The lower layer bitstreams are processed according to the control packets to reconstruct the original data. The start code judgement and the control packet generation are achieved by software. On the other hand, the lower layer bitstream processing is achieved by wired-logic circuitry.

摘要翻译： 从包括至少一个基本层比特流的MPEG（运动图像专家组）比特流重建原始数据。 基本层比特流由上层比特流和跟随上层比特流的多个下层比特流组成。 检测添加到MPEG比特流的头部的起始码以产生起始码检测信号。 当响应于检测信号判断检测到的起始码被添加到上层比特流的头部时，产生控制分组。 控制分组携带已经被编码为较低层比特流的原始数据的重建信息。 根据控制分组处理下层比特流以重构原始数据。 通过软件实现起始码判断和控制包生成。 另一方面，下层比特流处理通过有线逻辑电路实现。

公开(公告)号：US07053907B2

公开(公告)日：2006-05-30

申请号：US10628332

申请日：2003-07-29

申请人： Hayato Nakao

发明人： Hayato Nakao

IPC分类号： G09G5/00 ,  G06T11/40 ,  G06T17/00

CPC分类号： G06T11/40

摘要： An input two-dimensional image is divided into equal-size blocks. MIP maps with different resolutions are generated in response to each of the blocks. A memory stores data representative of the MIP maps for each of the blocks. Polygon data represent conditions of a polygon and also a correspondence between the polygon and positions of pixels of a two-dimensional image to be applied to the polygon. On the basis of the polygon data, at least one is selected from the MIP maps represented by the data in the memory as a desired MIP map on a pixel-by-pixel basis. Data representative of the desired MIP map are read from the memory. Calculation is made as to a color intensity of each pixel in a final image in which the desired MIP map is applied to the polygon on a pixel-by-pixel basis. Data representative of each calculated pixel color intensity are outputted.

摘要翻译： 输入二维图像被分成相等尺寸的块。 响应于每个块生成具有不同分辨率的MIP映射。 存储器存储表示每个块的MIP映射的数据。 多边形数据表示多边形的条件，也表示多边形与要应用于多边形的二维图像的像素的位置之间的对应关系。 在多边形数据的基础上，从存储器中的数据所表示的MIP映射中，至少一个以逐个像素为基础选择为期望的MIP映射。 从存储器读取表示所需MIP映射的数据。 对最终图像中的每个像素的颜色强度进行计算，其中期望的MIP图被逐个像素地应用于多边形。 输出表示每个计算出的像素颜色强度的数据。