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    Parallel tone detector
    1.
    发明授权
    Parallel tone detector 失效
    并行音调检测器

    公开(公告)号：US3686576A

    公开(公告)日：1972-08-22

    申请号：US3686576D

    申请日：1970-12-18

    Applicant: IBM

    Inventor： ABRAMSON PAUL ,  GOERTZEL GERALD

    IPC: H04Q1/457

    CPC classification number: H04Q1/457

    Abstract: A parallel tone detection method, system and apparatus includes using several generators for providing square waves at the fundamental frequency of several parallel tones to be detected. An unknown input signal is clipped and then AND gates are used to test for the simultaneous presence of the A.C. polarities of both the unknown input signal and each respective square wave. A lowpass filter is connected to each of the outputs of the AND gates associated with each tone. The outputs of the filters for each tone are connected into a corresponding analogue OR gate, which is one of a series of analogue OR gates. Then it is determined whether the outputs of any of the analogue OR gates exceeds a standard value. If it does then a circuit determines which analogue OR gate produces the largest output to identify the tone received.

    Abstract translation: 并行音检测方法，系统和装置包括使用几个发生器来提供要检测的几个并行音调的基频的方波。 未知输入信号被削波，然后与门用于测试未知输入信号和每个相应方波的同时存在A.C.极性。 低通滤波器连接到与每个音调相关联的与门的每个输出。 每个音调的滤波器的输出连接到相应的模拟或门，它是一系列模拟或门之一。 然后确定任何模拟或门的输出是否超过标准值。 如果这样做，则电路确定哪个模拟或门产生最大输出以识别所接收的音。

    METHOD FOR CONVERTING A BIT MAP OF AN IMAGE TO A RUN LENGTH OR RUN END REPRESENTATION
    4.
    发明专利
    METHOD FOR CONVERTING A BIT MAP OF AN IMAGE TO A RUN LENGTH OR RUN END REPRESENTATION 未知

    公开(公告)号：CA1304812C

    公开(公告)日：1992-07-07

    申请号：CA478625

    申请日：1985-04-09

    Applicant: IBM

    Inventor： ANDERSON KAREN L ,  MITCHELL JOAN L V ,  PENNEBAKER WILLIAM B ,  GOERTZEL GERALD

    IPC: G06F3/153 ,  G06T9/00 ,  H03M7/46 ,  H04N1/41 ,  H04N1/419 ,  H04N7/12

    Abstract: A method for converting an image from a bit map to a run end or run length representation includes the steps of : storing the image as a bit map representation; accessing for each byte in an image by a look-up table a selected routine, corresponding to such byte, from a number of routines for converting bit strings to run representations, wherein the look-up table accessed is selected in accordance with a color value of a preceding pixel binary bit; and executing the selected routine on the current byte to convert the bit string to a run representation; storing in a run representation buffer, as a count value, each run representation; repeating the above steps of accessing and executing for each byte and storing for each run of continuous color to the end of the image. Y0984-032

    7.
    发明专利
    未知

    公开(公告)号：DE3484136D1

    公开(公告)日：1991-03-28

    申请号：DE3484136

    申请日：1984-12-11

    Applicant: IBM

    Inventor： ANDERSON KAREN LOUISE ,  GOERTZEL GERALD ,  MITCHELL JOAN LA VERNE

    IPC: H04N1/41 ,  G06F3/14 ,  G06T9/00 ,  H03M7/46 ,  H04N1/419

    Abstract: 57 A method for converting an image from a bit map to a run end or run length representation includes the steps of: storing said image as a bit map representation; initializing all variables to be used in the conversion process; converting by table lookup, each run of continuous color to a run end; storing, in a run end buffer, as a count value, each run end; repeating the steps of converting and storing for each run of continuous color to the end of the image.

    METHOD FOR ROTATING A BINARY IMAGE
    8.
    发明专利
    METHOD FOR ROTATING A BINARY IMAGE 未知

    公开(公告)号：CA1252902A

    公开(公告)日：1989-04-18

    申请号：CA508409

    申请日：1986-05-05

    Applicant: IBM

    Inventor： PRUETT DAVID R ,  GOERTZEL GERALD ,  TOMPSON GERHARD R

    IPC: G06T3/60 ,  G06F15/62

    Abstract: The present invention deals with rotating an n x n block of bits through an angle of +90 degrees or -90 degrees by a method including the steps of: storing the data in a matrix; separating the matrix into groups of bits of rotatable size; transposing first preselected bit positions with second preselected bit positions in each group; and exchanging a first one or more rows of bits in the group with a second one or more rows of bits in the group.

    FILE COMPRESSOR
    9.
    发明专利
    FILE COMPRESSOR 未知

    公开(公告)号：CA1241760A

    公开(公告)日：1988-09-06

    申请号：CA504662

    申请日：1986-03-20

    Applicant: IBM

    Inventor： GOERTZEL GERALD

    IPC: G06F5/00 ,  H03M7/40 ,  H03M7/42 ,  G06F15/40

    Abstract: An adaptive method of file compression is based on the recognition that language can be thought of as a stream of alternating words and separators. Empty dictionaries are created for the words and separators. For each event in the data stream, a determination is made whether the word is in the dictionary for words compiled from the previously encountered words or whether the word is a new word. If the event is a separator, a similar determination is made using the dictionary for separators. If the event is a new word or a new separator, the event is encoded with a predetermined new word or new separator symbol followed by encoding the characters of the word or separator. A count is maintained of all word events and a count is maintained of all separator events as those events are encoded. In addition, individual counts for each occurence of a word and each occurence of a separator are maintained. The ratio of the number of times a word has been encountered to the total number of words encountered is used to estimate the probability of the word. Similarly, the ratio of the number of times a separator has been encountered is used to estimate the probability of the separator. These probabilities are used with a coding scheme, such as arithmetic coding, to code the words and separators in the two dictionaries.

    METHOD FOR ROTATING A BINARY IMAGE
    10.
    发明专利
    METHOD FOR ROTATING A BINARY IMAGE 未知

    公开(公告)号：CA1222081A

    公开(公告)日：1987-05-19

    申请号：CA467899

    申请日：1984-11-15

    Applicant: IBM

    Inventor： ANDERSON KAREN L ,  MINTZER FREDERICK C ,  GOERTZEL GERALD ,  MITCHELL JOAN L

    IPC: G06T3/60 ,  G09G3/00

    Abstract: A method for rotating an image by 90 degrees includes the steps of: storing the image in a raster format arranged in r rows by c columns, image information in each row being stored in a number of bytes, each byte having b bits, there being c/b bytes in each row of the raster format; moving a block of the image into a temporary storage, there being n rows by m columns in the block; separating each image block into groups of bytes of rotatable size; determining for each group if all bits are the same value; rotating each group that does not have all bits the same value; storing each rotated group in an output area of the raster storage; repeating the above steps for all remaining blocks of the image.

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