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公开(公告)号：US06912645B2
公开(公告)日：2005-06-28
申请号：US10198185
申请日：2002-07-18
申请人： Sean Matthew Dorward , Sean Quinlan
发明人： Sean Matthew Dorward , Sean Quinlan
CPC分类号： G06F17/30073 , G06F17/30097 , G06F17/30188 , Y10S707/99931
摘要： Data storage techniques particularly well-suited for use in archival data storage are disclosed. In one aspect of the invention, a data block is processed to generate an address as a function of the contents of the data block, and the data block is then stored in the system in a memory location identified by the address. The processing operation is configured to provide write-once archival storage of the data block, in that the contents of the data block are not modifiable without also altering the address of the data block determinable in the processing operation. In an illustrative embodiment, the processing of the data block involves determining a substantially unique identifier of the data block by applying a collision-resistant hash function to the contents of the data block, and the address is subsequently determined from the substantially unique identifier by utilizing the identifier to perform a lookup of the address in an index.
摘要翻译： 公开了特别适用于存档数据存储的数据存储技术。 在本发明的一个方面，处理数据块以根据数据块的内容生成地址，然后将数据块存储在由该地址标识的存储器位置中的系统中。 处理操作被配置为提供数据块的一次性归档存储，因为数据块的内容不可修改，而不会改变在处理操作中可确定的数据块的地址。 在说明性实施例中，数据块的处理涉及通过对数据块的内容应用抗冲突散列函数来确定数据块的基本上唯一的标识符，并且随后通过利用基本上唯一的标识符来确定地址 用于执行索引中地址查找的标识符。
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2.发明授权Method and apparatus for data compression of network packets employing per-packet hash tables 有权采用每分组哈希表的网络数据包的数据压缩方法和装置公开(公告)号：US06236341B1
公开(公告)日：2001-05-22
申请号：US09526844
申请日：2000-03-16
申请人： Sean Matthew Dorward , Sean Quinlan
发明人： Sean Matthew Dorward , Sean Quinlan
IPC分类号： H03M700
CPC分类号： H03M7/3084
摘要： A method and apparatus for compressing packets that enables inter-packet compression thereby achieving greater robustness and increased compression ratios. More particularly, a variable-length coding is used in conjunction with maintaining a separate hash table for each packet. Further, the per-packet hash table indexes particular byte strings in the packet but does not index data in any other packet(s). That is, a respective separate hash table for each packet is employed wherein such hash table is constructed as the particular packet is compressed. As such, the respective hash table is encoded with the particular packet. Employing a per-packet hash table in combination with variable history state inter-packet compression provides for efficient and robust overall compression of the packets.
摘要翻译： 一种用于压缩能够进行分组间压缩的分组的方法和装置，从而实现更大的鲁棒性和增加的压缩比。 更具体地，可变长度编码与维护每个分组的单独散列表结合使用。 此外，每分组散列表索引分组中的特定字节串，但是不对任何其他分组中的数据进行索引。 也就是说，对于每个分组使用相应的单独的哈希表，其中在特定分组被压缩时构造这样的哈希表。 这样，相应的哈希表用特定分组进行编码。 采用每分组散列表与可变历史状态分组间压缩相结合，提供了分组的有效且鲁棒的整体压缩。
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3.发明授权Device and method for efficient utilization of allocated transmission medium bandwidth 失效用于有效利用分配的传输媒体带宽的设备和方法
公开(公告)号：US5825976A
公开(公告)日：1998-10-20
申请号：US634538
申请日：1996-04-18
申请人： Sean Matthew Dorward , Nuggehally Sampath Jayant , James David Johnston , Schuyler Reynier Quackenbush , Kenneth Lane Thompson
发明人： Sean Matthew Dorward , Nuggehally Sampath Jayant , James David Johnston , Schuyler Reynier Quackenbush , Kenneth Lane Thompson
CPC分类号： H04L1/0041 , H04B1/665
摘要： An independent transport layer is used as an error correction mechanism in a method employing perceptual audio coding. The transport layer is characterized by the addition of information, via a transport header, to each of a succession of blocks of encoded program material which is independent of the information within its respective block of encoded program material. The transport header comprises information on the structure of the block. Thus, the transport header is easily separated from the digital representation of the program material and is independent of the content of the digital representation thereby providing for changing of the content of the digital representation without changing the transport layer.
摘要翻译： 在使用感知音频编码的方法中，使用独立的传输层作为纠错机制。 传输层的特征在于，通过传输报头将信息添加到独立于其相应编码节目素材块内的信息的编码节目素材块中的每一个。 传输报头包括关于块的结构的信息。 因此，传输标题容易地与节目素材的数字表示分离，并且独立于数字表示的内容，从而提供数字表示的内容的改变而不改变传输层。
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4.发明授权
公开(公告)号：US5701389A
公开(公告)日：1997-12-23
申请号：US381376
申请日：1995-01-31
CPC分类号： H04B1/665
摘要： A method of encoding an audio signal is disclosed. The method comprises partitioning the audio signal into a first time block and a second time block. Next, a first time block first energy value and a first time block second energy value are calculated. Next, a second time block first energy value and a second time block second energy value are calculated. Next, the technique determines if an attack has occurred in the second time block by comparing the second time block first energy value and the second time block second energy value and also comparing the Erst time block and the second time block Advantageously, the method identifies attach such that the decoder can reproduce the attacks with little audible distortion and also affords the advantage of using long windows for portions of the audio signal that do not contain attacks.
摘要翻译： 公开了一种编码音频信号的方法。 该方法包括将音频信号划分成第一时间块和第二时间块。 接下来，计算第一时间块第一能量值和第一时间块第二能量值。 接下来，计算第二时间块第一能量值和第二时间块第二能量值。 接下来，该技术通过比较第二时间块第一能量值和第二时间块第二能量值，并且还比较第一时间块和第二时间块来确定在第二时间块中是否发生了攻击。有利的是，该方法识别附加 使得解码器可以再现具有很小可听失真的攻击，并且还提供了对不包含攻击的音频信号的部分使用长窗口的优点。
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公开(公告)号：US06388584B1
公开(公告)日：2002-05-14
申请号：US09527315
申请日：2000-03-16
申请人： Sean Matthew Dorward , Sean Quinlan
发明人： Sean Matthew Dorward , Sean Quinlan
IPC分类号： H03M734
CPC分类号： H03M7/3084
摘要： A method and apparatus for compressing packets that enables inter-packet compression thereby achieving greater robustness and increased compression ratios without the deleterious effects, e.g., the effect of packet loss multiplying, of prior compression schemes. More particularly, a so-called acknowledgment scheme is employed in conjunction with the specific compression algorithm such that the transmitter, i.e., sender, can limit the history used by the compression algorithm to those packets that are correctly received. In particular, a vector identifying the packets used as the history is included in the compressed packet thereby enabling the receiver to reconstruct the packet history state necessary to decompress the packet. Advantageously, increased robustness and greater compression ratios are achieved independent of any particular one compression scheme.
摘要翻译： 一种用于压缩能够进行分组间压缩的分组的方法和装置，从而实现更大的鲁棒性和增加的压缩比，而不会产生现有压缩方案的有害影响，例如分组丢失乘法的影响。 更具体地，所谓的确认方案与特定的压缩算法结合使用，使得发送者，即发送者，可以将压缩算法使用的历史限制到正确接收的那些分组。 特别地，识别用作历史的分组的向量被包括在压缩分组中，从而使得接收机能够重建解压缩分组所需的分组历史状态。 有利地，独立于任何特定的一个压缩方案实现了增强的鲁棒性和更大的压缩比。
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6.发明授权
公开(公告)号：US5699479A
公开(公告)日：1997-12-16
申请号：US384097
申请日：1995-02-06
CPC分类号： H04B1/665
摘要： A new technique for the determination of the masking effect of an audio signal is employed to provide transparent compression of an audio signal at greatly reduced bit rates. The new technique employs the results of recent research into the psycho-physics of noise masking in the human auditory system. This research suggests that noise masking is a function of the uncertainty in loudness as perceived by the brain. Measures of loudness uncertainty are employed to form noise masking thresholds for use in the compression of audio signals. These measures are employed in an illustrative subband, analysis-by-synthesis framework. In accordance with the illustrative embodiment, provisional encodings of the audio signal are performed to determine the encoding which achieves a loudness differential, between the original and coded audio signal, which is less than (but not too far below) the loudness uncertainty.
摘要翻译： 采用用于确定音频信号的掩蔽效果的新技术来以极大降低的比特率提供音频信号的透明压缩。 新技术采用最近对人类听觉系统噪声屏蔽心理物理学研究的结果。 这项研究表明，噪声屏蔽是大脑感知到的响度不确定度的函数。 使用响度不确定度的测量来形成用于压缩音频信号的噪声屏蔽阈值。 这些措施用于说明性的子带，综合分析框架。 根据说明性实施例，执行音频信号的临时编码以确定在原始和编码音频信号之间实现响度差的编码，其小于（但不是远低于）响度不确定性。
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