公开(公告)号：US20100067545A1

公开(公告)日：2010-03-18

申请号：US12623844

申请日：2009-11-23

申请人： Koichi Hata ,  Akihiro Miyazaki ,  Koji Imura ,  Daiji Ido

发明人： Koichi Hata ,  Akihiro Miyazaki ,  Koji Imura ,  Daiji Ido

IPC分类号： H04L29/08 ,  H04J3/18

CPC分类号： H04L1/0078 ,  H04L1/0001 ,  H04L1/1809 ,  H04L69/04 ,  H04L69/22

摘要： A packet compressor 12 operates under a reliable mode or an optimistic mode. A mode determination unit 31 counts the number of ACK packets or NACK packets received by a unit time X by an ACK/NACK packet receiver 14. When the counted number of NACK packets is larger than a predetermined value Y, the mode determination unit 31 switches the operation mode of the packet compressor 12 to the reliable mode. When the counted number of ACK packets is larger than a predetermined value Z, the mode determination unit 31 switches the operation mode of the packet compressor 12 to the optimistic mode.

摘要翻译： 分组压缩机12在可靠模式或乐观模式下操作。 模式确定单元31对由ACK / NACK分组接收器14单位时间X接收到的ACK分组或NACK分组的数量进行计数。当NACK分组的计数数量大于预定值Y时，模式确定单元31切换 分组压缩机12的运行模式为可靠模式。 当计数的ACK分组数量大于预定值Z时，模式确定单元31将分组压缩器12的操作模式切换到乐观模式。

公开(公告)号：US07203184B2

公开(公告)日：2007-04-10

申请号：US10069933

申请日：2001-07-09

申请人： Daiji Ido ,  Koji Imura ,  Akihiro Miyazaki ,  Koichi Hata

发明人： Daiji Ido ,  Koji Imura ,  Akihiro Miyazaki ,  Koichi Hata

IPC分类号： H04J3/24 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04L47/22 ,  H04L1/1809 ,  H04L1/1848 ,  H04L1/1854 ,  H04L12/6418 ,  H04L47/10 ,  H04L47/14 ,  H04L47/2416 ,  H04L47/283 ,  H04L47/34 ,  H04L49/90

摘要： Received packets are preserved in a receiving buffer 102; a playback decision section 103 decides whether the preserved packets are in time for the playback time or not; the playback orders and the preservation addresses of the preserved packets which have been decided to be in time are memorized in a pointer 104 for playback; the preserved packets are read and played back according to the pointer 104 for playback. And, the playback orders and the preservation addresses of the preserved packets are memorized in a pointer 106 for preservation; and a media conversion section 107 reads the preserved packets according to the pointer 106 for preservation, and memorizes them after conversion into packets with a form by which the packets may be memorized in a preservation memory 108.

摘要翻译： 接收到的数据包保存在接收缓冲器102中; 回放判定部103判断保留的分组是否在播放时间的时间内; 已经被确定在时间上的保留分组的回放顺序和保存地址被存储在指针104中用于回放; 根据指示器104对保存的数据包进行读取和重放，以便重放。 并且，将保留的分组的回放顺序和保存地址存储在用于保存的指针106中; 并且媒体转换部分107根据用于保存的指针106读取保留的分组，并且在转换成具有可以将分组存储在保存存储器108中的形式的分组之后存储它们。

公开(公告)号：US08185661B2

公开(公告)日：2012-05-22

申请号：US12623844

申请日：2009-11-23

申请人： Koichi Hata ,  Akihiro Miyazaki ,  Koji Imura ,  Daiji Ido

发明人： Koichi Hata ,  Akihiro Miyazaki ,  Koji Imura ,  Daiji Ido

IPC分类号： G06F15/16 ,  H04J3/24

CPC分类号： H04L1/0078 ,  H04L1/0001 ,  H04L1/1809 ,  H04L69/04 ,  H04L69/22

摘要： A packet compressor 12 operates under a reliable mode or an optimistic mode. A mode determination unit 31 counts the number of ACK packets or NACK packets received by a unit time X by an ACK/NACK packet receiver 14. When the counted number of NACK packets is larger than a predetermined value Y, the mode determination unit 31 switches the operation mode of the packet compressor 12 to the reliable mode. When the counted number of ACK packets is larger than a predetermined value Z, the mode determination unit 31 switches the operation mode of the packet compressor 12 to the optimistic mode.

摘要翻译： 分组压缩机12在可靠模式或乐观模式下操作。 模式确定单元31对由ACK / NACK分组接收器14单位时间X接收到的ACK分组或NACK分组的数量进行计数。当NACK分组的计数数量大于预定值Y时，模式确定单元31切换 分组压缩机12的运行模式为可靠模式。 当计数的ACK分组数量大于预定值Z时，模式确定单元31将分组压缩器12的操作模式切换到乐观模式。

公开(公告)号：US07266118B2

公开(公告)日：2007-09-04

申请号：US10143989

申请日：2002-05-14

申请人： Daiji Ido ,  Koji Imura ,  Akihiro Miyazaki ,  Koichi Hata ,  Carsten Burmeister

发明人： Daiji Ido ,  Koji Imura ,  Akihiro Miyazaki ,  Koichi Hata ,  Carsten Burmeister

IPC分类号： H04L12/22

CPC分类号： H04L1/0045 ,  H04L1/0061 ,  H04L1/0072 ,  H04L69/04 ,  H04L69/16 ,  H04L69/161 ,  H04L69/22

摘要： A packet receiving method may include receiving a packet having either a compressed header or a noncompressed header. A packet received with a compressed header is decompressed to regenerate a non-compressed header for the packet. Error detection is performed to detect the presence of an error in a packet: (1) received with a noncompressed header, (2) having a regenerated non-compressed header, or (3) having a replacement non-compressed header. Part of the non-compressed header, in a packet having a regenerated non-compressed header, is replaced with previously stored non-compressed header information, which is known to be correct, when an error is detected in the packet so as to produce a replacement non-compressed header. A packet is output as a correctly received packet when no error is detected in the packet.

摘要翻译： 分组接收方法可以包括接收具有压缩报头或非压缩报头的分组。 用压缩报头接收的分组被解压缩以再生用于分组的非压缩报头。 执行错误检测以检测分组中的错误的存在：（1）使用非压缩报头接收（2）具有再生的非压缩报头，或（3）具有替换非压缩报头。 在具有再生的非压缩报头的分组中的非压缩报头的一部分被替换为已知正确的先前存储的非压缩报头信息，当在分组中检测到错误以产生 替换非压缩头。 当分组中没有检测到错误时，分组被输出为正确接收的分组。

公开(公告)号：US20050094647A1

公开(公告)日：2005-05-05

申请号：US11003981

申请日：2004-12-06

申请人： Koichi Hata ,  Akihiro Miyazaki ,  Koji Imura ,  Daiji Ido

发明人： Koichi Hata ,  Akihiro Miyazaki ,  Koji Imura ,  Daiji Ido

IPC分类号： H03M7/30 ,  H04L1/00 ,  H04L1/16 ,  H04L1/18 ,  H04L12/70 ,  H04L29/08 ,  H04L29/14 ,  H04L12/56

CPC分类号： H04L1/0078 ,  H04L1/0001 ,  H04L1/1809 ,  H04L69/04 ,  H04L69/22

摘要： A packet compressor 12 operates under a reliable mode or an optimistic mode. A mode determination unit 31 counts the number of ACK packets or NACK packets received by a unit time X by an ACK/NACK packet receiver 14. When the counted number of NACK packets is larger than a predetermined value Y, the mode determination unit 31 switches the operation mode of the packet compressor 12 to the reliable mode. When the counted number of ACK packets is larger than a predetermined value Z, the mode determination unit 31 switches the operation mode of the packet compressor 12 to the optimistic mode.

摘要翻译： 分组压缩机12在可靠模式或乐观模式下操作。 模式确定单元31对由ACK / NACK分组接收器14单位时间X接收到的ACK分组或NACK分组的数量进行计数。当NACK分组的计数数量大于预定值Y时，模式确定单元31切换 分组压缩机12的运行模式为可靠模式。 当计数的ACK分组数量大于预定值Z时，模式确定单元31将分组压缩器12的操作模式切换到乐观模式。

公开(公告)号：USRE43100E1

公开(公告)日：2012-01-10

申请号：US11976453

申请日：2007-10-24

申请人： Koichi Hata ,  Akihiro Miyazaki ,  Koji Imura ,  Daiji Ido

发明人： Koichi Hata ,  Akihiro Miyazaki ,  Koji Imura ,  Daiji Ido

IPC分类号： G06F11/00

CPC分类号： H04L29/06 ,  H04L69/04 ,  H04L69/22 ,  H04L69/40

摘要： In a header decompression apparatus 709, a header decompressor 703 refers to reference information stored in a reference information manager 707 to decompress a compressed header of a packet received by a packet receiver 704. An error detector 702 detects a CRC error in the packet with its header decompressed by the packet receiver 704, and outputs only a correct packet. A successive error counter 705 counts the number of successive errors detected by the error detector 702. A successive decompression success counter 706 counts the number of decompression successes that successively appear. By referring to these counted numbers, an update request unit 708 transmits an update request to a transmitting side as required. The reference information manager 707 manages the reference information for header decompression. With this structure, the header decompression apparatus can request update of the reference information based on the state of the error.

摘要翻译： 在报头解压缩装置709中，报头解压缩器703参考存储在参考信息管理器707中的参考信息，以解压缩由分组接收机704接收到的分组的压缩报头。错误检测器702检测分组中的CRC错误，其中 由分组接收机704解压缩的报头，并且仅输出正确的分组。 连续错误计数器705对由错误检测器702检测到的连续错误的数目进行计数。连续的解压缩成功计数器706对连续出现的解压成功次数进行计数。 通过参考这些计数，更新请求单元708根据需要向发送侧发送更新请求。 参考信息管理器707管理标题解压缩的参考信息。 利用该结构，报头解压缩装置可以基于错误的状态来请求更新参考信息。

公开(公告)号：US07295575B2

公开(公告)日：2007-11-13

申请号：US10173308

申请日：2002-06-18

申请人： Daiji Ido ,  Koji Imura ,  Akihiro Miyazaki ,  Koichi Hata ,  Carsten Burmeister

发明人： Daiji Ido ,  Koji Imura ,  Akihiro Miyazaki ,  Koichi Hata ,  Carsten Burmeister

IPC分类号： H04J3/24

CPC分类号： H04L69/04 ,  H03M7/30 ,  H04L29/06 ,  H04L69/16 ,  H04L69/161 ,  H04L69/164 ,  H04L69/22

摘要： A packet transmission apparatus and method may divide data into a plurality of packets and transmit the packets. At a transmitting end, a context identifying number, identifying a data stream, is selected based on a relationship between a sequence number of a packet that is to be transmitted and a sequence number in an immediately preceding packet. A sequence number denoting an order of a packet divided on a per context basis is compressed, and transmission data assigned to the context identifying number with the compressed sequence number is transmitted on a per packet basis. At the receiving end, the compressed sequence number is decompressed on a per context basis. The context is separated based on the context identifying number, and data is combined by reassembling a packet into the order of a decompressed sequence number.

摘要翻译： 分组发送装置和方法可以将数据划分为多个分组并发送分组。 在发送端，基于要发送的分组的序列号与紧接在前的分组中的序列号之间的关系来选择识别数据流的上下文识别号码。 压缩表示以每个上下文为基础的分组的顺序的序列号，并且以每个分组为基础发送分配给具有压缩序列号的上下文识别号码的发送数据。 在接收端，压缩序列号在每个上下文的基础上进行解压缩。 基于上下文识别号分离上下文，并且通过将分组重组为解压缩序列号的顺序来组合数据。

公开(公告)号：US07197687B2

公开(公告)日：2007-03-27

申请号：US10466251

申请日：2002-09-19

申请人： Koji Imura ,  Daiji Ido ,  Akihiro Miyazaki ,  Koichi Hata

发明人： Koji Imura ,  Daiji Ido ,  Akihiro Miyazaki ,  Koichi Hata

IPC分类号： H03M13/39

CPC分类号： H04L1/0083 ,  H04L1/18 ,  H04L69/04 ,  H04L69/22 ,  H04L2001/0098

摘要： When an error is detected in a received header, in estimating reference information while assuming an error in a packet receiving interval, a header is decompressed using at least one value of another candidate sequence numbers used in correcting an erroneous sequence number, corresponding to a time that elapses between previously receiving a packet correctly and receiving a current packet and to the packet receiving internal. It is thereby possible to increase a possibility of estimating the reference information correctly and suppress the number of discarded packets at a receiving side, while suppressing increases in introduced processing amount in data transmission with header compression.

摘要翻译： 当在接收到的报头中检测到错误时，在分组接收间隔中假设出错时估计参考信息时，使用用于校正错误序列号的另一个候选序列号的至少一个值来解压缩报头，对应于时间 以前在正确地接收分组并且接收当前分组之间以及接收内部的分组之间经过。 由此，可以在抑制通过报头压缩的数据传输中引入的处理量的增加的同时，增加准确地估计参考信息的可能性，并抑制接收侧的丢弃分组的数量。

公开(公告)号：US07079582B2

公开(公告)日：2006-07-18

申请号：US10070388

申请日：2001-07-03

申请人： Koji Imura ,  Daiji Ido ,  Akihiro Miyazaki ,  Koichi Hata

发明人： Koji Imura ,  Daiji Ido ,  Akihiro Miyazaki ,  Koichi Hata

IPC分类号： H04N7/12

CPC分类号： H04N21/6375 ,  H04N19/115 ,  H04N19/124 ,  H04N19/15 ,  H04N19/152 ,  H04N19/176 ,  H04N19/46 ,  H04N19/61 ,  H04N19/67 ,  H04N19/89

摘要： In a bit counter 214, an amount of codes included in one transmission unit is counted; in a significance decision section 217, the amount of codes counted in the bit counter 214 is divided by the number of coded macroblocks included in the one transmission unit to calculate an average amount of codes per one coded macroblocks; and in a threshold comparing section 220, the significance of the pertinent transmission unit is decided by comparing the average amount of codes to the calculated threshold based on a frame rate and a bit rate.

摘要翻译： 在位计数器214中，对包含在一个发送单元中的代码量进行计数; 在有效性判定部217中，将位计数器214中计数的代码量除以包含在一个发送单元中的编码宏块的数量，以计算每个编码宏块的平均代码量; 并且在阈值比较部分220中，通过基于帧速率和比特率将平均代码量与所计算的阈值进行比较来确定相关传输单元的重要性。

公开(公告)号：US07024490B2

公开(公告)日：2006-04-04

申请号：US09985421

申请日：2001-11-02

申请人： Koichi Hata ,  Akihiro Miyazaki ,  Koji Imura ,  Daiji Ido

发明人： Koichi Hata ,  Akihiro Miyazaki ,  Koji Imura ,  Daiji Ido

IPC分类号： G60F13/00

CPC分类号： H04L69/04 ,  H04L69/22

摘要： A transmission end (header compression end) and a reception end (header decompression end) share the same timestamp calculation information which is previously prepared. At the transmission end, in the case that the timestamp of the current packet to be subjected to header compression cannot be compressed with the current timestamp calculation information, the history record which covers timestamp calculation information previously transmitted is referred to for determining whether to transmit a packet header carrying the timestamp without updating the current timestamp calculation information, or a packet header carrying the timestamp by updating the current timestamp calculation information.

摘要翻译： 发送端（头压缩结束）和接收端（头部解压缩结束）共享预先准备的相同的时间戳计算信息。 在发送端，在当前时间戳计算信息不能压缩要进行头压缩的当前分组的时间戳的情况下，参照先前发送的覆盖时间戳计算信息的历史记录来确定是否发送 携带时间戳而不更新当前时间戳计算信息的分组报头，或者通过更新当前时间戳计算信息来携带时间戳的分组报头。