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    • 2. 发明授权
    • Method for the detection and recovery of errors in the frame overhead of digital video decoding systems
    • 用于检测和恢复数字视频解码系统的帧开销中的错误的方法
    • US06836514B2
    • 2004-12-28
    • US09901809
    • 2001-07-10
    • Bhavan GandhiKevin O'ConnellFaisal IshtiaqRaghavan Subramaniyan
    • Bhavan GandhiKevin O'ConnellFaisal IshtiaqRaghavan Subramaniyan
    • H04N718
    • H04L1/20
    • The disclosed invention is a method to detect candidate errors within the picture start code, picture header, and picture timestamp. Upon detection, these errors may be confirmed and the impacts mitigated. An error within the timestamp bit field is adaptively detected by the use of a threshold comparison, and a mechanism for concealing the timestamp information leaves only a small timestamp anomaly. An error within the picture start code (PSC) is determined by adaptively analyzing the number of bits and the macro-block location of the next slice or GOB. If a PSC is suspected to have been overrun due to an error, this method allows for data beyond the first GOB or slice to be recovered in the frame. Depending on the extent of use of slices and GOBs, the method can recover a majority of the frame that otherwise would have been completely lost. A candidate error within the picture header is evaluated by utilizing the first slice or GOB of the frame and analyzing information from a previous frame to check whether the current frame's header information should be replaced with the previous frame's header information. Replacing the erred frame header can result in a majority of the data within the frame being recovered that would otherwise be discarded if the header was not replaced.
    • 所公开的发明是检测图像起始码,图像头部和图像时间戳内的候选误差的方法。 经检测,可能会确认这些错误,并减轻影响。 通过使用阈值比较来自适应地检测时间戳位字段内的错误,并且用于隐藏时间戳信息的机制仅留下小的时间戳异常。 通过自适应地分析下一个切片或GOB的位数和宏块位置来确定图像起始码(PSC)内的错误。 如果PSC被怀疑由于错误而被超载,则该方法允许超出第一个GOB或切片的数据在帧中被恢复。 根据切片和GOB的使用范围,该方法可以恢复否则将完全丢失的大部分帧。 通过利用帧的第一片或GOB并分析来自前一帧的信息来评估图片头中的候选错误,以检查当前帧的标题信息是否应该被前一帧的标题信息替换。 更换错误的帧头可能会导致正在恢复的帧内的大部分数据,否则如果未更换标题,则将被丢弃。
    • 7. 发明申请
    • SEISMIC SURVEY COMMUNICATION SYSTEMS AND METHODS
    • 地震调查通信系统与方法
    • US20110305114A1
    • 2011-12-15
    • US13156723
    • 2011-06-09
    • Daniel GolparianGuillaume TamboiseSharath Babu MusunooriKevin O'Connell
    • Daniel GolparianGuillaume TamboiseSharath Babu MusunooriKevin O'Connell
    • G01V1/22
    • G01V1/003
    • An embodiment of the invention may extend the range of wireless communications in a seismic acquisition survey. The embodiment may leverage the infrastructure of a hard-wired communications backbone by appending wireless cells to the hard-wired communications. This may allow, for example, a recording truck to control remotely located seismic sources via wireless communications in the spread. Another embodiment includes a communication system for servicing field equipment. The embodiment provides for a fully or semi automated process for communicating equipment failures between survey personnel (e.g., recording truck operators and line observers). The embodiment establishes an end-to-end channel between, for example, the recording truck and field crew members. Other embodiments are disclosed herein.
    • 本发明的实施例可以扩展地震采集调查中无线通信的范围。 该实施例可以通过将无线小区附加到硬连线通信来利用硬连线通信骨干网的基础设施。 这可以允许例如记录卡车通过传播中的无线通信来控制远程定位的地震源。 另一个实施例包括用于维护现场设备的通信系统。 该实施例提供了用于在测量人员(例如记录卡车操作员和线路观察者)之间通信设备故障的完全或半自动化过程。 该实施例在例如记录卡车和现场机组成员之间建立端到端通道。 本文公开了其它实施例。