Digital audio companding and error conditioning
    1.
    发明授权
    Digital audio companding and error conditioning 失效
    数字音频压扩和错误调节

    公开(公告)号:US4809274A

    公开(公告)日:1989-02-28

    申请号:US091911

    申请日:1987-09-04

    CPC分类号: H03G7/007 H03M7/3053

    摘要: A system for companding digital audio signal samples processes the digital audio signal samples to correct errors induced by the compression and expansion processes. These errors are calculated prior to compressing the samples. Such errors are calculated in accordance with a predetermined compression process and a predetermined expansion process; and the digital audio signal samples are corrected in accordance with such calculations prior to compression. The compression process includes providing a 3-bit gain word for a block of 70 samples. The gain word is computed in accordance with the position of the most significant "1" bit in the sample(s) having the peak magnitude. Each individual sample is processed in accordance with the block gain word to compress the sample by reducing the number of magnitude bits. The error calculation process includes calculating an error signal by subtracting a calculated reproduced digital audio signal sample from the digital audio signal sample to be compressed, filtering the error signal by noise-spectral filtering and adding the filtered error signal to the next-providing digital audio signal sample to provide a corrected digital audio signal sample for compression. The error calculation process also includes calculating an error value based upon the effect of using a single gain word for compressing a block of samples. The error value is subtracted from the corrected digital audio signal sample prior to compression. The gain word is forward error corrected by (5,1) encoding to enable detection and correction of both single-bit and double-bit errors in transfer by majority voting. The sign bit and the most significant magnitude bits of the compressed samples are forward error corrected to enable detection and correction of single-bit errors in transfer and to enable detection and concealment of double-bit errors in transfer.

    摘要翻译: 用于压缩数字音频信号样本的系统处理数字音频信号样本以校正由压缩和扩展过程引起的误差。 在压缩样品之前计算这些误差。 这样的误差根据预定的压缩处理和预定的扩展处理来计算; 并且在压缩之前根据这样的计算校正数字音频信号样本。 压缩过程包括为70个样本的块提供3位增益字。 根据具有峰值幅度的采样中最高有效“1”位的位置来计算增益字。 根据块增益字来处理每个单独的样本,以通过减少幅度比特数来压缩样本。 误差计算处理包括通过从要压缩的数字音频信号样本中减去计算出的再现数字音频信号样本来计算误差信号,通过噪声频谱滤波对误差信号进行滤波,并将滤波后的误差信号加到下一个提供的数字音频 信号采样以提供用于压缩的校正数字音频信号样本。 误差计算处理还包括基于使用单个增益字来压缩采样块的效果来计算误差值。 在压缩之前从校正的数字音频信号样本中减去误差值。 增益字是通过(5,1)编码进行前向误差校正,以便通过多数表决来传输单位和双位错误的检测和校正。 压缩样本的符号位和最高有效幅度位是前向纠错的,以便能够检测和校正传输中的单位错误,并能够检测和隐藏传输中的双位错误。

    Automatic adjustment of receiver apparatus based on
channel-bit-error-rate-affected parameter measurement
    2.
    发明授权
    Automatic adjustment of receiver apparatus based on channel-bit-error-rate-affected parameter measurement 失效
    基于信道比特率影响参数测量自动调整接收机设备

    公开(公告)号:US5463403A

    公开(公告)日:1995-10-31

    申请号:US180574

    申请日:1994-01-12

    摘要: Alignment of an antenna and a polarizer for the antenna are automatically adjusted and the frequency setting of a frequency-tunable receiver is automatically adjusted while receiving a broadcast communication signal that is forward-error-correction coded by processing the forward-error-correction code of the received signal to measure a channel-bit-error-rate-affected parameter for the received signal; by realigning the antenna and the polarizer from their respective initial positions in response to the measured parameter until the measured parameter is minimized; and by retuning the receiver from its initial frequency setting in response to the measured parameter until the measured parameter is minimized. A Viterbi decoder processes the forward-error-correction code of the received signal to compute path metrics affected by the bit-error rate of the received signal and normalizes the computed path metrics; and a counter counts the normalizations over fixed intervals to measure a path metric normalization rate as the measured parameter.

    摘要翻译: 自动调整用于天线的天线和偏振器的对准,并且在接收通过处理前向纠错码的前向纠错编码的广播通信信号的同时自动调整频率可调接收机的频率设置 所接收的信号用于测量接收信号的信道 - 比特误码率影响参数; 通过响应于测量的参数将天线和偏振器从其各自的初始位置重新对准,直到测量的参数最小化; 并且通过响应于测量的参数将接收器从其初始频率设置重新调度,直到所测量的参数被最小化。 维特比解码器处理接收信号的前向纠错码以计算受接收信号的误码率影响的路径度量,并对计算出的路径量度进行归一化; 并且计数器对固定间隔的归一化进行计数,以测量路径度量标准化率作为测量参数。

    Video scrambling by segmenting video information lines
    3.
    发明授权
    Video scrambling by segmenting video information lines 失效
    通过视频信息线分割视频加扰

    公开(公告)号:US4736420A

    公开(公告)日:1988-04-05

    申请号:US909763

    申请日:1986-09-19

    IPC分类号: H04K1/06 H04N7/169 H04N7/167

    CPC分类号: H04N7/1696

    摘要: A system for scrambling a video signal having a plurality of horizontal lines, each of which includes a video information portion and a non-video information portion. The scrambling system includes a memory; means for storing the video information portion of each video signal line in the memory; and means for forming scrambled horizontal lines by retrieving each of a plurality of said stored video information lines in a plurality of segments preceded by a non-video segment and separated by non-video segment(s). The retrieval means include means for varying the respective durations of the retrieved video information segments in individual scrambled horizontal lines in accordance with an encryption keystream; and means for varying the total duration of the non-video segments for individual scrambled horizontal lines in accordance with a predetermined timing pattern. A complementary descrambling system also is disclosed.

    摘要翻译: 一种用于对具有多个水平行的视频信号进行加扰的系统,每个水平行包括视频信息部分和非视频信息部分。 加扰系统包括存储器; 用于将每个视频信号线的视频信息部分存储在存储器中的装置; 以及用于通过在由非视频段前面并由非视频段分隔的多个段中检索多个所述存储的视频信息行中的每一个来形成加扰的水平线的装置。 检索装置包括用于根据加密密钥流改变检索到的各个加扰水平行中的视频信息段的持续时间的装置; 以及用于根据预定定时模式改变针对各个加扰水平线的非视频段的总持续时间的装置。 还公开了补充解扰系统。

    Automatic adjustment of receiver apparatus based on
channel-bit-error-rate-affected parameter measurement
    4.
    发明授权
    Automatic adjustment of receiver apparatus based on channel-bit-error-rate-affected parameter measurement 失效
    基于信道比特率影响参数测量自动调整接收机设备

    公开(公告)号:US5287115A

    公开(公告)日:1994-02-15

    申请号:US911890

    申请日:1992-07-10

    摘要: Alignment of an antenna and a polarizer for the antenna are automatically adjusted and the frequency setting of a frequency-tunable receiver is automatically adjusted while receiving a broadcast communication signal that is forward-error-correction coded by processing the forward-error-correction code of the received signal to measure a channel-bit-error-rate-affected parameter for the received signal; by realigning the antenna and the polarizer from their respective initial positions in response to the measured parameter until the measured parameter is minimized; and by retuning the receiver from its initial frequency setting in response to the measured parameter unitl the measured parameter is minimized. A Viterbi decoder processes the forward-error-correction code of the received signal to compute path metrics affected the bit-error rate of the received signal and normalizes the computed path metrics; and a counter counts the normalizations over fixed intervals to measure a path metric normalization rate as the measured parameter.

    摘要翻译: 自动调整用于天线的天线和偏振器的对准,并且在接收通过处理前向纠错码的前向纠错编码的广播通信信号的同时自动调整频率可调接收机的频率设置 所接收的信号用于测量接收信号的信道 - 比特误码率影响参数; 通过响应于测量的参数将天线和偏振器从其各自的初始位置重新对准,直到测量的参数最小化; 并且通过响应于测量参数unit1将接收器从其初始频率设置重新调整,所测量的参数被最小化。 维特比解码器处理接收信号的前向纠错码以计算影响接收信号的误码率的路径度量,并且对计算出的路径量度进行归一化; 并且计数器对固定间隔的归一化进行计数,以测量路径度量标准化率作为测量参数。

    Personal identification number (PIN) generation between two devices in a network
    5.
    发明授权
    Personal identification number (PIN) generation between two devices in a network 有权
    网络中两台设备之间的个人识别码(PIN)生成

    公开(公告)号:US09148423B2

    公开(公告)日:2015-09-29

    申请号:US12345010

    申请日:2008-12-29

    摘要: A method of generating a Personal Identification Number (PIN) between a first device and a second device in a network is provided. The method includes securely receiving information of input choices of the second device and random numbers assigned to the input choices at the first device. At the first device, the PIN is generated from the random numbers, and instructions are provided directing an entry of the input choices on the second device. At the second device, the input choices are entered. The second device is operable to generate the PIN from the input choices and the random numbers if the input choices are entered as instructed.

    摘要翻译: 提供了一种在网络中的第一设备和第二设备之间生成个人识别码(PIN)的方法。 该方法包括安全接收第二设备的输入选择信息和分配给第一设备上的输入选择的随机数。 在第一设备处,从随机数生成PIN,并且提供指令,以将输入选择的条目引导到第二设备上。 在第二个设备上输入输入选项。 如果按照指示输入输入选项,则第二设备可操作以从输入选项和随机数生成PIN。

    Moving content between set top box and end devices in home
    6.
    发明授权
    Moving content between set top box and end devices in home 有权
    在家庭机顶盒和终端设备之间移动内容

    公开(公告)号:US09100689B2

    公开(公告)日:2015-08-04

    申请号:US13071233

    申请日:2011-03-24

    摘要: A content moving device which enables providing content stored on a first user device, such as a DVR, in a first format and resolution to be provided to a second user device, such as a portable media player (PMP) in a second format and resolution. The content moving device identifies content on the first user device as candidate content which may be desired by the PMP and receives the candidate content from the DVR. The content moving device transcodes the candidate content at times independent of a request from the PMP for the content. The content moving device may provide a list of available transcoded content to the PMP for selection, and provide selected content to the PMP. The content moving device may also provide information relating to any protection schemes of the content provided to the PMP, such as DRM rights and decryption keys. The content moving device performs the often computationally intense and time consuming transcoding of user content to enable the user to move content between different user devices in a convenient manner.

    摘要翻译: 一种内容移动装置,其能够以第一格式提供存储在诸如DVR的第一用户设备上的内容,并且提供要提供给第二用户设备的分辨率,诸如第二格式的便携式媒体播放器(PMP)和分辨率 。 内容移动装置将第一用户装置上的内容识别为PMP可能期望的候选内容,并从DVR接收候选内容。 内容移动设备在与内容的PMP的请求无关的时候对候选内容进行转码。 内容移动设备可以向PMP提供可用的代码转换内容的列表以供选择,并将选择的内容提供给PMP。 内容移动设备还可以提供与提供给PMP的内容的任何保护方案有关的信息,诸如DRM权限和解密密钥。 内容移动装置执行经常计算强烈且耗时的用户内容的转码,以使用户能够以便利的方式在不同用户装置之间移动内容。

    Remote control apparatus, method and user interface system
    7.
    发明授权
    Remote control apparatus, method and user interface system 有权
    遥控装置,方法和用户界面系统

    公开(公告)号:US09066126B2

    公开(公告)日:2015-06-23

    申请号:US12960610

    申请日:2010-12-06

    摘要: Apparatus forming part of a home entertainment system includes an electronic device having an input accepting a signal corresponding to an externally-generated first user interface, a control module for internally-generating a signal corresponding to a second user interface, and an output for transmitting a combination of the above referenced signals for display. The control module controls an arrangement of display of the first user interface and the second user interface. The apparatus also includes a remote controller for communicating via a two-way communication link with the control module of the electronic device concerning a selection of one of the first user interface and the second user interface. The remote controller having an emitter for emitting control code signals, and the operation of the emitter is controlled by communications received by the remote controller from the control module of the electronic device. A method is also provided.

    摘要翻译: 构成家庭娱乐系统的一部分的装置包括:电子装置,其具有接受与外部生成的第一用户接口相对应的信号的输入;内部生成对应于第二用户界面的信号的控制模块;以及用于发送 组合上述参考信号进行显示。 控制模块控制第一用户界面和第二用户界面的显示布置。 该装置还包括遥控器,用于通过双向通信链路与电子设备的控制模块进行通信,涉及第一用户界面和第二用户界面之一的选择。 具有用于发射控制码信号的发射器和发射器的操作的遥控器由遥控器从电子设备的控制模块接收的通信来控制。 还提供了一种方法。

    Method And Apparatus For Cross DRM Domain Registration
    9.
    发明申请
    Method And Apparatus For Cross DRM Domain Registration 有权
    用于跨DRM域名注册的方法和装置

    公开(公告)号:US20120011571A1

    公开(公告)日:2012-01-12

    申请号:US13177522

    申请日:2011-07-06

    IPC分类号: G06F21/20

    摘要: A content moving device may provide content to plurality of different user devices using a plurality of different DRM systems. The content moving device provides for registration of the DRM systems associated with the user devices. The content moving device may verify a user device by a DRM ID associated with the user device. A domain size may be used to limit the number of content user devices that may be approved for access.

    摘要翻译: 内容移动设备可以使用多个不同的DRM系统向多个不同的用户设备提供内容。 内容移动设备提供与用户设备相关联的DRM系统的注册。 内容移动设备可以通过与用户设备相关联的DRM ID来验证用户设备。 可以使用域大小来限制可能被批准用于访问的内容用户设备的数量。

    Secure control of security mode
    10.
    发明授权
    Secure control of security mode 有权
    安全模式的安全控制

    公开(公告)号:US07660986B1

    公开(公告)日:2010-02-09

    申请号:US09576516

    申请日:2000-05-23

    IPC分类号: H04L9/32 H04N7/167

    摘要: A system to change security levels is used to change the level of security used in a secured processing system. The system uses a status indicator to designate the security level being implemented. The security level can be upgraded to allow a higher level of security to be implemented with relative ease. However, in order to change from a higher level of security to a lower level of security, an authorization code is utilized to confirm that the change in security is authorized.

    摘要翻译: 用于更改安全级别的系统用于改变安全处理系统中使用的安全级别。 系统使用状态指示器来指定正在执行的安全级别。 可以升级安全级别,以便相对容易地实现更高级别的安全性。 然而,为了从更高的安全级别改为较低级别的安全性,使用授权码来确认安全性的改变是否被授权。