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    • 4. 发明授权
    • IP datagram de-encapsulation
    • IP数据报解封装
    • US07804835B2
    • 2010-09-28
    • US11814280
    • 2006-01-16
    • Arie Geert Cornelis KoppelaarLudovicus Marinus Gerardus Maria TolhuizenOnno Eerenberg
    • Arie Geert Cornelis KoppelaarLudovicus Marinus Gerardus Maria TolhuizenOnno Eerenberg
    • H04L12/28
    • H04L1/0057H04H60/11H04L1/0045
    • An apparatus (1001), system (1000) and method (800-900) are provided for improving the de-encapsulation of sections from Multi Protocol Encapsulation (MPE) (151) and Multi Protocol Encapsulation-Forward Error Correction (MPE-FEC) (152) Sections in a DVB-H transport stream. DVB-H is a standard for broadcasting services to hand-helds. Its difference from DVB-T, C, and S that is relevant for this invention is the presence of an additional layer of Forward Error Correction (FEC). Instead of restoring only correctly received sections (151) (152) the present invention also restores fragments of sections (151) (152) by using both Transport Stream packet headers (301. i.1) and section headers (151.1). As a result, entire sections (800-900) may not be erased (which can amount to up to 4080 bytes) whenever one or more fragments are received incorrectly, but only the incorrectly received fragments (which can be each up to 184 bytes) are erased. This leads to a more efficient use of the additional layer of Forward Error Correction (FEC) information.
    • 提供了一种装置(1001),系统(1000)和方法(800-900),用于改进来自多协议封装(MPE)(151)和多协议封装前向纠错(MPE-FEC)的段的解封装, (152)DVB-H传输流中的节。 DVB-H是向手持广播服务的标准。 与本发明相关的与DVB-T,C和S的差异在于存在额外的前向纠错(FEC)层。 代替仅正确接收的部分(151)(152),本发明还通过使用传输流分组报头(301.i.1)和部分报头(151.1)来恢复部分(151)(152)的片段。 因此,一旦一个或多个片段被错误地接收,但只有不正确接收到的片段(每个可以高达184字节),则整个部分(800-900)可能不被擦除(其可以达到4080字节) 被抹去 这导致更有效地使用附加层的前向纠错(FEC)信息。
    • 5. 发明申请
    • Ip Datagram De-Encapsulation
    • Ip数据报解封装
    • US20080282310A1
    • 2008-11-13
    • US11814280
    • 2006-01-16
    • Arie Geert Cornelis KoppelaarLudovicus Marinus Gerardus Maria TolhuizenOnno Eerenberg
    • Arie Geert Cornelis KoppelaarLudovicus Marinus Gerardus Maria TolhuizenOnno Eerenberg
    • H04N7/173H04L12/28
    • H04L1/0057H04H60/11H04L1/0045
    • An apparatus (1001), system (1000) and method (800-900) are provided for improving the de-encapsulation of sections from Multi Protocol Encapsulation (MPE) (151) and Multi Protocol Encapsulation-Forward Error Correction (MPE-FEC) (152) Sections in a DVB-H transport stream. DVB-H is a standard for broadcasting services to hand-helds. Its difference from DVB-T, C, and S that is relevant for this invention is the presence of an additional layer of Forward Error Correction (FEC). Instead of restoring only correctly received sections (151) (152) the present invention also restores fragments of sections (151) (152) by using both Transport Stream packet headers (301. i.1) and section headers (151.1). As a result, entire sections (800-900) may not be erased (which can amount to up to 4080 bytes) whenever one or more fragments are received incorrectly, but only the incorrectly received fragments (which can be each up to 184 bytes) are erased. This leads to a more efficient use of the additional layer of Forward Error Correction (FEC) information.
    • 提供了一种装置(1001),系统(1000)和方法(800-900),用于改进来自多协议封装(MPE)(151)和多协议封装前向纠错(MPE-FEC)的段的解封装, (152)DVB-H传输流中的节。 DVB-H是向手持广播服务的标准。 与本发明相关的与DVB-T,C和S的差异在于存在额外的前向纠错(FEC)层。 代替仅正确接收的部分(151)(152)恢复,本发明还通过使用传输流分组报头(301.i.1)和部分报头(151.1)来恢复部分(151)(152)的片段。 因此,只要一个或多个片段被错误地接收,但只有不正确接收到的片段(每个可以高达184个字节),则整个部分(800-900)可能不会被擦除(可以达到4080字节) 被抹去 这导致更有效地使用附加层的前向纠错(FEC)信息。
    • 8. 发明授权
    • Transmission system with improved receiver
    • 传输系统具有改进的接收机
    • US06549574B1
    • 2003-04-15
    • US09610713
    • 2000-07-06
    • Abraham Jan De BartArie Geert Cornelis KoppelaarConstant Paul Marie Jozef Baggen
    • Abraham Jan De BartArie Geert Cornelis KoppelaarConstant Paul Marie Jozef Baggen
    • H04B166
    • H04L1/0057H04L1/0046H04L1/0054H04L1/0065H04L1/0068
    • In a transmission system for digital symbols, such as used for DVB, source symbols are encoded by a block coder (4), subjected to an interleaving operation in an interleaver and subsequently encoder in a channel encoder (8) according to one out of a plurality of possible channel codes. The output symbols of the channel encoder (8) are applied to transmit means (10). These output symbols are modulated on a carrier and applied to an antenna (12). An antenna (14) connected to a receiver (16) receives the signal transmitted by the antenna (12). Receive means (18) are arranged for amplifying and demodulating the signal received from the antenna (14). The output of the receive means (18) are applied to quantizing means (20) which convert its input signal into a quantized digital signal, before applying it to a Viterbi decoder 22. The complexity of the Viterbi decoder 22 depends on the number of quantization levels at the output of the quantization means (20). Consequently, this number of quantization levels should be not too high. On the other hand a too low number of quantization levels results in a degradation of the performance of the Viterbi detector (22). A suitable choice of the quantization levels depends also on the channel code used. According to the inventive concept of the present invention, the quantization levels are chosen in dependence on the channel code used. This channel code can be represented by the puncturing rate. In a preferred embodiment the quantization means are realized by a cascade connection of an analog to digital converter (34) and translation means (36). The translation means (36) converts the constant quantization levels at the output of the analog to digital converter (34) into quantization levels which depend on the working point of the channel code used.
    • 在诸如用于DVB的数字符号的传输系统中,源符号由块编码器(4)编码,在交织器中进行交织操作,随后在信道编码器(8)中进行编码,根据 多个可能的信道码。 信道编码器(8)的输出符号被应用于发送装置(10)。 这些输出符号在载波上被调制并施加到天线(12)。 连接到接收器(16)的天线(14)接收由天线(12)发送的信号。 接收装置(18)被布置用于放大和解调从天线(14)接收的信号。 接收装置(18)的输出被施加到量化装置(20),其将其输入信号转换成量化的数字信号,然后将其应用于维特比解码器22.维特比解码器22的复杂度取决于量化的数量 在量化装置(20)的输出处的电平。 因此,这个量化级别应该不会太高。 另一方面,量化级数太少导致维特比检测器(22)的性能下降。 量化级别的合适选择也取决于所使用的信道码。 根据本发明的发明构思,根据所使用的信道码来选择量化级别。 该信道码可以用打孔率表示。 在优选实施例中,量化装置通过模数转换器(34)和转换装置(36)的级联连接实现。 转换装置(36)将模数转换器(34)的输出处的恒定量化电平转换成取决于使用的信道码的工作点的量化电平。