公开(公告)号：US07200189B1

公开(公告)日：2007-04-03

申请号：US10269795

申请日：2002-10-11

Applicant: Roger Stenerson ,  WeiMin Zhang

Inventor： Roger Stenerson ,  WeiMin Zhang

IPC: H03D3/18 ,  H03D3/24

CPC classification number: H04L7/0029

Abstract: A system for providing adaptive timing recovery is provided. In an exemplary embodiment, the system includes a fractional resampler, an error function module and a loop filter, arranged collectively to form a timing recovery loop. In an initial mode, the error function module compares the output of the fractional resampler with a reference signal to determine an error, if any. An error signal is generated accordingly based on the error. The error signal is then provided to the loop filter allowing the loop filter to generate a correction signal. The correction signal is provided to the fractional resampler to allow the fractional resampler to generate an output which minimizes the error. When the error function module determines that the error is within an acceptable range, i.e., a timing lock is achieved, the system goes into a steady mode. In the steady mode, the error function module is directed to execute at a slower rate. By executing at a slower rate, the error function module is able to operate at a reduced level of power consumption.

Abstract translation: 提供了一种用于提供自适应定时恢复的系统。 在示例性实施例中，系统包括集中布置以形成定时恢复环路的分数重采样器，误差功能模块和环路滤波器。 在初始模式下，误差功能模块将分数重采样器的输出与参考信号进行比较，以确定是否存在错误。 基于该错误相应地生成错误信号。 然后将误差信号提供给环路滤波器，使得环路滤波器产生校正信号。 校正信号被提供给分数重采样器，以允许分数重采样器产生最小化误差的输出。 当错误功能模块确定错误在可接受的范围内时，即实现定时锁定时，系统进入稳定模式。 在稳定模式下，错误功能模块被指示以较慢的速率执行。 通过以较慢的速率执行，误差功能模块能够以降低的功耗水平进行操作。

公开(公告)号：US20060156185A1

公开(公告)日：2006-07-13

申请号：US11304994

申请日：2005-12-14

Applicant: Wei-Min Zhang ,  Timothy Misko

Inventor： Wei-Min Zhang ,  Timothy Misko

IPC: H03M13/00

CPC classification number: H03M13/29 ,  H03M13/2978 ,  H04L1/0009 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/0076 ,  H04L25/14

Abstract: Error correction coding across multiple channels is provided in multi-channel transmission systems. Specifically, redundancy is provided by selecting a portion of original data from each of a plurality of original channels, performing at least one encoding operation using the portions of original data to produce at least one portion of redundancy data, including the portion of redundancy data in at least one redundancy channel, and transmitting the redundancy channel along with the original channels. Error correction is achieved by receiving at least one redundancy channel and a plurality of original channels, selecting a portion of redundancy data from the redundancy channel, selecting a portion of original data from each of the original channels, and performing at least one decoding operation using the portion of redundancy data and the portions of original data to correct at least one error in the portions of original data.

公开(公告)号：US07069574B1

公开(公告)日：2006-06-27

申请号：US09650329

申请日：2000-08-29

Applicant: Thomas G Adams ,  Randy R Fuller

Inventor： Thomas G Adams ,  Randy R Fuller

IPC: H04N7/20

CPC classification number: H04N21/6143 ,  H04N7/20 ,  H04N21/4305

Abstract: A method and system are provided for synchronizing a digital video system that includes a transmitter, a receiver, and a decoder. A transport packet is received from the transmitter. At the start of receiving the transport packet, a system time clock timestamp is captured. A program clock reference timestamp is also obtained from the transport packet and is compared with the system time clock timestamp.

Abstract translation: 提供了一种用于同步包括发射机，接收机和解码器的数字视频系统的方法和系统。 从发射机接收传输分组。 在接收到传输分组的开始时，捕获系统时间时间戳。 还从传输分组获得节目时钟参考时间戳，并与系统时钟时间戳进行比较。

公开(公告)号：US07065696B1

公开(公告)日：2006-06-20

申请号：US10412745

申请日：2003-04-11

Applicant: Binfan Liu ,  Zhongqian Wang ,  Weimin Zhang

Inventor： Binfan Liu ,  Zhongqian Wang ,  Weimin Zhang

IPC: H03M13/29

CPC classification number: H03M13/256 ,  H03M13/2732 ,  H03M13/2936 ,  H03M13/333 ,  H04L1/0052 ,  H04L1/0054 ,  H04L1/006 ,  H04L1/0065

Abstract: A system for providing a high-speed implementation for multi-stream forward error correction (FEC) is provided. According to one exemplary aspect, the system is able to provide block-based multi-stream FEC that reduces the power consumption when compared with conventional symbol-based FEC. The system provides a pipeline architecture for multi-stream FEC so that modules in the system are able to respectively process blocks of data from different channels or data streams.

Abstract translation: 提供了一种用于提供用于多流前向纠错（FEC）的高速实现的系统。 根据一个示例性方面，与传统的基于符号的FEC相比，该系统能够提供降低功耗的基于块的多流FEC。 该系统为多流FEC提供流水线架构，使得系统中的模块能够分别处理来自不同信道或数据流的数据块。

公开(公告)号：US20050207449A1

公开(公告)日：2005-09-22

申请号：US11084058

申请日：2005-03-17

Applicant: Weimin Zhang ,  Bin-Fan Liu

Inventor： Weimin Zhang ,  Bin-Fan Liu

IPC: H04B7/212 ,  H04H20/77 ,  H04J1/00 ,  H04L12/16 ,  H04L29/06 ,  H04N5/00 ,  H04N7/26 ,  H04N7/50 ,  H04Q11/00 ,  H04H1/04

CPC classification number: H04N5/44 ,  H04L29/06027 ,  H04L65/604 ,  H04L65/607 ,  H04N19/107 ,  H04N19/12 ,  H04N19/134 ,  H04N19/172 ,  H04N19/40 ,  H04N19/61 ,  H04N19/85 ,  H04N21/4331 ,  H04N21/434 ,  H04N21/4383 ,  H04N21/4384 ,  H04N21/4385 ,  H04N21/482 ,  H04Q2213/13034 ,  H04Q2213/13174 ,  H04Q2213/13248

Abstract: Methods, apparatuses, and systems are presented for switching between channels of encoded media data involving receiving encoded media data including reference frames and dependent frames for a plurality of channels, wherein each dependent frame refers to at least one reference frame. Frames associated with a first channel from the plurality of channels are decoded to generate a decoded signal for the first channel. While decoding frames associated with the first channel, data corresponding to at least one reference frame associated with a second channel from the plurality of channels are stored. In response to a control signal for switching from the first to the second channel, at least one dependent frame associated with the second channel is decoded by utilizing the stored data corresponding to the at least one reference frame associated with the second channel, to generate a decoded signal for the second channel.

Abstract translation: 呈现用于在编码媒体数据的信道之间切换的方法，装置和系统，所述编码媒体数据涉及接收包括用于多个信道的参考帧和相关帧的编码媒体数据，其中每个从属帧指的是至少一个参考帧。 与来自多个通道的第一通道相关联的帧被解码以产生用于第一通道的解码信号。 在解码与第一信道相关联的帧时，存储与来自多个信道的与第二信道相关联的至少一个参考帧的数据。 响应于用于从第一信道切换到第二信道的控制信号，通过利用对应于与第二信道相关联的至少一个参考帧的所存储的数据来解码与第二信道相关联的至少一个相关帧，以产生 第二通道的解码信号。