利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

15 条记录 (耗时 0.015 秒)

    SUB-SCRAMBLING/DESCRAMBLING METHOD AND SUB-SCRAMBLING/DESCRAMBLING DEVICE
    11.
    发明公开
    SUB-SCRAMBLING/DESCRAMBLING METHOD AND SUB-SCRAMBLING/DESCRAMBLING DEVICE 审中-公开
    VERFAHREN UND VORRICHTUNG ZUR TEILVERSCHLEIERUNG / ENTSCHLEIERUNG

    公开(公告)号：EP0996251A1

    公开(公告)日：2000-04-26

    申请号：EP99939240.0

    申请日：1999-03-11

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： EJIMA, Naoki

    IPC分类号： H04L9/26

    CPC分类号： H04L25/03866

    摘要： A sub-scrambling/descrambling method and device for enhancing the degree of scrambling of linear PCM data. Data is delimited every predetermined time, and the minimum value of a run is found and used as annex information. The run part is replaced with an arbitrary irreversible random data string. The data string is processed by a main scrambling device to generate transmission data. After the main descrambling of the transmission data, the descrambling device takes out the annex information and replaced the random data string with a predetermined "0" or "1" run according to the annex information. Thus, the degree of scrambling of linear PCM data is enhanced as much as or more than compressed video data is.

    摘要翻译： 一种用于增强线性PCM数据的加扰度的子加扰/解扰方法和装置。 每隔预定时间分隔数据，找到运行的最小值并将其用作附件信息。 运行部分被替换为任意不可逆的随机数据串。 数据串由主加扰装置处理以产生传输数据。 在发送数据的主要解扰后，解扰装置根据附件信息取出附件信息并用预定的“0”或“1”替换随机数据串。 因此，线性PCM数据的加扰度增加了压缩视频数据的多少或更多。

    WIDE BAND AUDIO SIGNAL ENCODER, WIDE BAND AUDIO SIGNAL DECODER, WIDE BAND AUDIO SIGNAL ENCODER/DECODER AND WIDE BAND AUDIO SIGNAL RECORDING MEDIUM
    12.
    发明公开
    WIDE BAND AUDIO SIGNAL ENCODER, WIDE BAND AUDIO SIGNAL DECODER, WIDE BAND AUDIO SIGNAL ENCODER/DECODER AND WIDE BAND AUDIO SIGNAL RECORDING MEDIUM 失效
    宽带音频信号编码器，宽带音频信号解码器，宽带音频信号编码器/解码器和宽带音频信号记录介质

    公开(公告)号：EP0880235A1

    公开(公告)日：1998-11-25

    申请号：EP97902603.6

    申请日：1997-02-07

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： EJIMA, Naoki

    IPC分类号： H03M7/30 ,  H03M7/40 ,  G11B20/10 ,  G10L7/04

    CPC分类号： G11B20/00007 ,  H04B1/667

    摘要： Provided is a wide band audio signal encoding apparatus, a wide band audio signal decoding apparatus, a wide band audio signal encoding and decoding apparatus and a wide band audio signal recording medium, each having a low bit rate, a wide band, a low distortion factor and a wide dynamic range as compared with those of the prior art. Wide band audio data is divided into signal data of a predetermined natural number N of sub-bands, and the number of bits for quantization for sub-sampling is determined based on noise floor information of the above wide band audio data. The signal data of the N sub-bands are sub-sampled by the respective numbers of bits for quantization, and encoded data obtained by multiplexing the signal data of the sub-sampled N sub-bands are recorded on a wide band audio signal recording medium. Therefore, both the characteristics of an extremely wide dynamic range and a wide band as compared with those of the prior art can be concurrently achieved at a relatively low bit rate per channel. This arrangement allows the achievement of recording and reproduction of an extremely transparent natural sound extending to an ultrahigh frequency region, a recording medium for recording a signal of the above wide band audio data and a reproduction sound field.

    摘要翻译： 提供一种宽带音频信号编码装置，宽带音频信号解码装置，宽带音频信号编码和解码装置以及宽带音频信号记录介质，每个都具有低比特率，宽带，低失真 因此与现有技术相比具有宽动态范围。 宽带音频数据被分成预定自然数N个子带的信号数据，并且基于上述宽带音频数据的本底噪声信息来确定用于二次采样的量化的比特数。 N个子频带的信号数据通过各自的量化位数被子采样，并且通过多路复用被子采样的N个子频带的信号数据而获得的编码数据被记录在宽带音频信号记录介质 。 因此，与现有技术相比，极宽动态范围和宽带两者的特性可以在每个通道相对较低的比特率下同时实现。 这种布置允许实现延伸到超高频区域的非常透明的自然声音的记录和再现，用于记录上述宽带音频数据和再现声场的信号的记录介质。

    APPARATUS FOR RECORDING OR REPRODUCING TIME CODE AND TIME CODE CONVERTOR
    13.
    发明公开
    APPARATUS FOR RECORDING OR REPRODUCING TIME CODE AND TIME CODE CONVERTOR 失效
    安东尼奥ZUM SPEICHERN UND ZUR WIEDERGABE DES ZEITKODES UND ZEITKODEUMWANDLER。

    公开(公告)号：EP0352338A1

    公开(公告)日：1990-01-31

    申请号：EP89902072.1

    申请日：1989-02-03

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： ADACHI, Tatsuya ,  NAGAI, Kiyotaka ,  NAKAJIMA, Yasushi ,  UENO, Takafumi ,  EJIMA, Naoki ,  NIKAIDO, Masataka

    IPC分类号： G11B27/02 ,  G11B27/28

    CPC分类号： G11B27/3036 ,  G11B27/02 ,  G11B27/032 ,  G11B27/28 ,  G11B27/3063 ,  G11B2220/90 ,  G11B2220/913

    摘要： This invention relates to a time code recording/reproduction apparatus for recording and reproducing a time code corresponding to a digital signal. Time code conversion means (100) converts a first time code to a second time code and frame timing generation means determines a frame phase used when the input information is recorded. Phase difference detection means (103) detects the phase difference between the frame of the second time code and a recording frame and phase difference correction means (104) outputs a third time code on the basis of the detected phase difference and the input information is recorded together with the third time code. Accordingly, the input information can be recorded or reproduced while its relationship with a corresponding time code is being retained.

    摘要翻译： 第一时间码被转换（100）到第二时间码，并且帧定时发生器确定当记录输入信息时使用的帧相位。 检测第二时间码的帧与记录帧之间的相位差，并且相位差校正器（104）根据检测到的相位差输出第三时间码，并且输入信息与第三时间码一起被记录。 因此，可以在保持与对应的时间码的关系的同时记录或再现输入信息。