Inverse-modified discrete cosine transform and overlap-add method and hardware structure for MPEG layer3 audio signal decoding

    公开(公告)号:US07065491B2

    公开(公告)日:2006-06-20

    申请号:US10078021

    申请日:2002-02-15

    CPC分类号: G10L19/16 G10L19/0212

    摘要: An inverse-modified discrete cosine transform and overlap-add method, and hardware structure for MPEG Layer3 audio signal decoding. In order to have the MPEG Layer3 audio signal decoder have more competitive power in the consumer market, the present invention provides a low cost fast algorithm of the inverse-modified discrete cosine transform and overlap-add, so that the quantity of the operation needed in the decoding process can be significantly reduced to enhance the system performance. Afterwards, according to the fast algorithm, the present invention provides a hardware structure that is suitable for the inverse-modified discrete cosine transform and overlap-add in the MPEG Layer3 decoder. Since the hardware structure of the present invention makes the MPEG Layer3 decoder able to be implemented by the application specific integrated circuit (ASIC), the entire system can fulfill the low cost and high performance requirements.

    Method of degrouping a codeword in MPEG-II audio decoding by iterative addition and subtraction
    62.
    发明授权
    Method of degrouping a codeword in MPEG-II audio decoding by iterative addition and subtraction 有权
    通过迭代加减法对MPEG-II音频解码中的码字进行分组的方法

    公开(公告)号:US06370501B1

    公开(公告)日:2002-04-09

    申请号:US09296878

    申请日:1999-04-22

    IPC分类号: G10L1900

    CPC分类号: G10L19/16

    摘要: The invention describes a simple and efficient codeword degrouping algorithm which can be applied in an MPEG audio decoder, in which a codeword is degrouped into three samples. According to the proposed algorithm, the division and modulo computations applied in the original degrouping method can be fully substituted into the addition and subtraction computations by using the mode selection and iterative decompositions, and thus largely reduces the overhead and complexity for the decoder. Also, an efficient architecture for the proposed algorithm includes one special adder, two subtractors, and two adders. The architecture generates the quotient and remainder simultaneously with fix-rate throughput.

    摘要翻译: 本发明描述了可以应用于MPEG音频解码器中的简单有效的码字去分组算法,其中码字被分组成三个样本。 根据所提出的算法,通过使用模式选择和迭代分解,将原始去分组方法中应用的划分和模计算完全代入加法和减法运算,从而大大降低了解码器的开销和复杂度。 此外,所提出的算法的有效架构包括一个特殊加法器,两个减法器和两个加法器。 该架构在固定速率吞吐量的同时产生商和余数。

    Lamp
    63.
    外观设计
    Lamp 有权

    公开(公告)号:USD966598S1

    公开(公告)日:2022-10-11

    申请号:US29735603

    申请日:2020-05-22

    申请人: Tsung-Han Tsai

    设计人: Tsung-Han Tsai

    Lamp
    64.
    外观设计
    Lamp 有权

    公开(公告)号:USD796726S1

    公开(公告)日:2017-09-05

    申请号:US29570167

    申请日:2016-07-06

    申请人: Tsung-Han Tsai

    设计人: Tsung-Han Tsai

    Optical lens system
    66.
    发明授权
    Optical lens system 有权
    光学透镜系统

    公开(公告)号:US09036270B2

    公开(公告)日:2015-05-19

    申请号:US13532441

    申请日:2012-06-25

    摘要: This invention provides an optical lens system comprising: a first lens element with negative refractive power having a convex object-side surface; a second lens element with negative refractive power having a concave object-side surface and a convex image-side surface; a third lens element with positive refractive power; a plastic fourth lens element with negative refractive power having a concave object-side surface and a convex image-side surface, with both the object-side and image-side surfaces thereof being aspheric, and having at least one inflection point positioned on at least one of the object-side and image-side surfaces thereof; wherein the number of lens elements with refractive power is limited to four. By such arrangement, especially by the first and the second lens elements with negative refractive power, the system has sufficient back focal length for arranging required optical elements, and thereby is suitable for various applications.

    摘要翻译: 本发明提供了一种光学透镜系统,包括:具有凸起物体侧表面的具有负折光力的第一透镜元件; 具有负折射力的第二透镜元件,具有凹面物侧表面和凸像侧表面; 具有正屈光力的第三透镜元件; 具有负屈光力的塑料第四透镜元件,具有凹面物侧表面和凸像侧表面,其物面和像侧表面都是非球面的,并且至少有一个拐点位于至少 其物体侧和像侧表面之一; 其中具有屈光力的透镜元件的数量被限制为四个。 通过这种布置,特别是通过具有负屈光力的第一和第二透镜元件,该系统具有足够的后焦距用于布置所需的光学元件,从而适用于各种应用。

    Optical image capturing lens assembly
    67.
    发明授权
    Optical image capturing lens assembly 有权
    光学摄像镜头组件

    公开(公告)号:US08982483B2

    公开(公告)日:2015-03-17

    申请号:US13354332

    申请日:2012-01-20

    CPC分类号: G02B13/004 G02B9/34 G02B13/04

    摘要: An optical image capturing lens assembly includes four non-cemented lens elements, in order from an object side to an image side: a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element with positive refractive power has a convex object-side surface and a convex image-side surface, and is made of plastic material, wherein the surfaces of the third lens element are aspheric. The fourth lens element with negative refractive power has a concave object-side surface and a convex image-side surface, and is made of plastic material, wherein the surfaces of the fourth lens element are aspheric.

    摘要翻译: 光学图像拍摄透镜组件包括从物体侧到像侧的顺序的四个非胶合透镜元件:第一透镜元件,第二透镜元件,第三透镜​​元件和第四透镜元件。 具有正折光力的第一透镜元件具有凸的物体侧表面。 具有负屈光力的第二透镜元件具有凹入的物体侧表面和凸形的图像侧表面。 具有正折光力的第三透镜元件具有凸形物体侧表面和凸形图像侧表面,并且由塑料材料制成,其中第三透镜元件的表面是非球面的。 具有负屈光力的第四透镜元件具有凹面物侧表面和凸像侧表面,并且由塑料材料制成,其中第四透镜元件的表面是非球面的。

    Capturing lens system
    68.
    发明授权
    Capturing lens system 有权
    捕捉镜头系统

    公开(公告)号:US08797658B2

    公开(公告)日:2014-08-05

    申请号:US13488636

    申请日:2012-06-05

    IPC分类号: G02B3/02 G02B13/18 G02B13/00

    CPC分类号: G02B13/0035

    摘要: This invention provides a capturing lens system in order from an object side to an image side comprising: a first lens element with positive refractive power; a plastic second lens element with negative refractive power having a concave object-side surface and a convex image-side surface, both the object-side and image-side surfaces thereof being aspheric; and a plastic third lens element with positive refractive power having a convex object-side surface and a concave image-side surface, both the object-side and image-side surfaces thereof being aspheric, and at least one inflection point is formed on at least one of the object-side and image-side surfaces thereof. Additionally, the central thickness of the second lens element is controlled favorably for the efficient spatial arrangement of the lens assembly and the simpler individual lens production while assuring suitable thickness of the second lens element, thereby assuring high image quality and improving yield rate of the product.

    摘要翻译: 本发明提供一种从物体侧到图像侧的顺序的拍摄透镜系统,包括:具有正折射力的第一透镜元件; 具有负折射力的塑料第二透镜元件具有凹面物侧表面和凸像侧表面,其物侧和像侧表面均为非球面; 以及具有正折射力的塑料第三透镜元件,具有凸面物侧表面和凹像侧面,其物侧和像侧表面均为非球面,并且至少形成至少一个拐点 其物体侧和像侧表面之一。 此外,第二透镜元件的中心厚度被有利地控制用于透镜组件的有效空间布置和更简单的单个透镜生产,同时确保第二透镜元件的合适厚度,从而确保高图像质量并提高产品的屈服率 。

    Image capturing optical lens assembly
    69.
    发明授权
    Image capturing optical lens assembly 有权
    图像采集光学透镜组件

    公开(公告)号:US08743479B2

    公开(公告)日:2014-06-03

    申请号:US13612858

    申请日:2012-09-13

    IPC分类号: G02B3/02 G02B9/08 G02B9/60

    CPC分类号: G02B13/0045

    摘要: An image capturing optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element with negative refractive power has a concave image-side surface. The third lens element with positive refractive power has a convex image-side surface. The fourth lens element has positive refractive power. The fifth lens element with refractive power is made of plastic material and has a concave image-side surface. At least one inflection point is formed on at least one of the object-side and image-side surfaces of the fifth lens element. The surfaces of the third lens element, the fourth lens element and the fifth lens element are aspheric.

    摘要翻译: 第一透镜元件,第二透镜元件,第三透镜​​元件,第四透镜元件和第五透镜元件,从物体侧到像侧依次包括图像拍摄光学透镜组件。 具有正折光力的第一透镜元件具有凸的物体侧表面。 具有负屈光力的第二透镜元件具有凹形图像侧表面。 具有正折光力的第三透镜元件具有凸形的图像侧表面。 第四透镜元件具有正屈光力。 具有屈光力的第五透镜元件由塑料材料制成并且具有凹形的图像侧表面。 在第五透镜元件的物体侧和图像侧表面中的至少一个上形成至少一个拐点。 第三透镜元件,第四透镜元件和第五透镜元件的表面是非球面的。

    Optical lens for image pickup
    70.
    发明授权
    Optical lens for image pickup 有权
    用于图像拾取的光学镜头

    公开(公告)号:US08743478B2

    公开(公告)日:2014-06-03

    申请号:US13399426

    申请日:2012-02-17

    IPC分类号: G02B13/18 G02B9/60

    CPC分类号: G02B13/0045

    摘要: An optical lens for image pickup, sequentially arranged from an object side to an image side along the optical axis comprising: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with refractive power; a plastic fourth lens element with positive refractive power having biconvex surfaces with at least one aspheric surface; and a plastic fifth lens element with negative refractive power having a concave image-side surface, with at least one aspheric surface and at least one inflection point. By such arrangements, the optical lens for image pickup satisfies conditions related to shorten the total length and to reduce the sensitivity for use in compact cameras and mobile phones with camera functionalities.

    摘要翻译: 一种用于图像拾取的光学透镜,其沿着光轴从物体侧到像侧依次布置,包括:具有凸起物体侧表面的具有正折光力的第一透镜元件; 具有负屈光力的第二透镜元件; 具有屈光力的第三透镜元件; 具有正屈光力的塑料第四透镜元件,具有至少一个非球面的双凸面; 以及具有负折射力的塑料第五透镜元件,具有凹形图像侧表面,具有至少一个非球面和至少一个拐点。 通过这样的配置,用于图像拾取的光学透镜满足与缩短总长度有关的条件并降低用于具有照相机功能的小型照相机和手机中的灵敏度。