Time multiplexing address and data on an existing PC parallel port
    1.
    发明授权
    Time multiplexing address and data on an existing PC parallel port 失效
    在现有PC并行端口上实现时间复用地址和数据

    公开(公告)号:US5694557A

    公开(公告)日:1997-12-02

    申请号:US288306

    申请日:1994-08-10

    IPC分类号: G06F13/42 G06F3/00

    CPC分类号: G06F13/4269

    摘要: A method of communicating with peripheral devices via a personal computer parallel port having computer data bus lines but no address bus lines comprising connecting the input of a multiplexer to the parallel port, the multiplexer having a data bus input and a databus output and an address bus output, applying address data to the computer data bus, applying an address control signal to the multiplexer and passing the address data only to the address bus output as a result thereof.

    摘要翻译: 一种通过具有计算机数据总线的个人计算机并行端口与外围设备进行通信的方法,但不包括将多路复用器的输入连接到并行端口的地址总线,多路复用器具有数据总线输入和数据总线输出以及地址总线 输出,将地址数据应用于计算机数据总线,将地址控制信号施加到复用器,并将地址数据作为结果传送到地址总线输出。

    Optimized color space conversion
    2.
    发明授权
    Optimized color space conversion 失效
    优化色彩空间转换

    公开(公告)号:US5923316A

    公开(公告)日:1999-07-13

    申请号:US732811

    申请日:1996-10-15

    IPC分类号: G09G5/02 H04N9/67 G09G5/04

    CPC分类号: H04N9/67 G09G5/02

    摘要: A method of converting video data from a YUV format to an RGB format comprising (a) performing a matrix transformation of Y, U and V pixel data of a set of possible Y, U and V parameters into corresponding R, G and B parameters, (b) determining whether the set of R, G and B parameters forms a first lookup table whose size exceeds the size of a particular memory space, (c) in the event the lookup table is too large for the memory space, truncating least significant bits of at least the U and V parameters, (d) repeating steps (a), (b) and (c) until the first lookup table fits the memory space, and then storing the first lookup table in the memory space, and (e) using the first lookup table to provide RGB pixel data using the YUV data as addresses thereto.

    摘要翻译: 一种将视频数据从YUV格式转换为RGB格式的方法,包括:(a)将一组可能的Y,U和V参数的Y,U和V像素数据的矩阵变换执行到相应的R,G和B参数中, (b)确定该组R,G和B参数是否形成尺寸超过特定存储器空间大小的第一查找表,(c)在查找表对于存储器空间太大的情况下,截断最小重要性 至少U和V参数的位,(d)重复步骤(a),(b)和(c),直到第一查找表适合存储器空间,然后将第一查找表存储在存储器空间中,并且( e)使用第一查找表以使用YUV数据作为其地址提供RGB像素数据。

    ICO based linear gain VCO with non-linear V/I converter
    3.
    发明授权
    ICO based linear gain VCO with non-linear V/I converter 失效
    具有非线性V / I转换器的基于ICO的线性增益VCO

    公开(公告)号:US5821821A

    公开(公告)日:1998-10-13

    申请号:US804825

    申请日:1997-02-24

    IPC分类号: H03K3/03 H03B27/00

    CPC分类号: H03K3/0315

    摘要: A voltage controlled oscillator comprising: a ring of inverters comprised of an odd number of serially connected CMOS inverter stages, the inverter stages being connected between first and second oppositely poled power leads, a MOSFET having a source-drain circuit connected between one of the power leads and a first power rail, the other power lead being connected to a second power rail, apparatus for operating the MOSFET in saturation, and apparatus for applying a control voltage to the gate of the MOSFET, referenced to the second power lead, whereby the MOSFET operates as a nonlinear current conduction device having a characteristic such as to linearize the voltage-frequency characteristic of the combined MOSFET--ring oscillator combination.

    摘要翻译: 一种压控振荡器,包括:由奇数个串联CMOS反相器级构成的反相器环,所述反相器级连接在第一和第二相对极化的电源引线之间,一个MOSFET,其源极 - 漏极电路连接在一个功率 引线和第一电源轨,另一个电源引线连接到第二电源轨,用于操作饱和的MOSFET的装置,以及以第二电源引线为参考的MOSFET的栅极施加控制电压的装置,由此, MOSFET作为非线性电流传导器件工作,具有将组合MOSFET环形振荡器组合的电压 - 频率特性线性化的特性。

    Digital audio processing in a modified bitBLT controller
    4.
    发明授权
    Digital audio processing in a modified bitBLT controller 失效
    改进的bitBLT控制器中的数字音频处理

    公开(公告)号:US5790678A

    公开(公告)日:1998-08-04

    申请号:US323876

    申请日:1994-10-17

    申请人: Daniel Gudmundson

    发明人: Daniel Gudmundson

    IPC分类号: G09G5/393 G10H7/00 H04B1/00

    摘要: A method of processing audio signals is comprised of reading samples of digitally stored audio signals from a first source memory, performing a bit block transfer (BitBLT) of the samples to a register of an arithmetic and logic unit (ALU), reading an array of coefficient signals (coefficients), performing a BitBLT of the coefficients to a register of the ALU, operating on the bit block transferred samples and coefficients together and storing resulting samples in a destination memory, whereby the stored resulting samples can be further accessed for audio reproduction, further processing, permanent storage or transmission.

    摘要翻译: 处理音频信号的方法包括从第一源存储器读取数字存储的音频信号的采样,将样本的位块传输(BitBLT)执行到算术和逻辑单元(ALU)的寄存器,读取数组 系数信号(系数),将系数的BitBLT执行到ALU的寄存器,对位块传送的样本和系数进行操作,并将得到的样本存储在目的地存储器中,由此可以进一步存储所得到的样本用于音频再现 ,进一步处理,永久存储或传输。