作业帮请教一个英译汉段落（四）
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请教一个英译汉段落（四）
Each packet sent in an RTP stream is given a number one higher than its predecessor.This numbering allows the destination to determine if any packets are missing.If a packet is missing,the best action for the destination to take is to approximate the missing value by interpolation.Retransmission is not a practical option since the retransmitted packet would probably arrive too late to be useful.As a consequence,RTP has no flow control,no error control,no acknowledgements,and no mechanism to request retransmissions.
Each RTP payload may contain multiple samples,and they may be coded any way that the application wants.To allow for interworking,RTP defines several profiles (e.g.,a single audio stream),and for each profile,multiple encoding formats may be allowed.For example,a single audio stream may be encoded as 8-bit PCM samples at 8 kHz,delta encoding,predictive encoding,GSM encoding,MP3,and so on.RTP provides a header field in which the source can specify the encoding but is otherwise not involved in how encoding is done.
拒绝软译
Each packet sent in an RTP stream is given a number one higher than its predecessor.This numbering allows the destination to determine if any packets are missing.If a packet is missing,the best action for the destination to take is to approximate the missing value by interpolation.Retransmission is not a practical option since the retransmitted packet would probably arrive too late to be useful.As a consequence,RTP has no flow control,no error control,no acknowledgements,and no mechanism to request retransmissions.
Each RTP payload may contain multiple samples,and they may be coded any way that the application wants.To allow for interworking,RTP defines several profiles (e.g.,a single audio stream),and for each profile,multiple encoding formats may be allowed.For example,a single audio stream may be encoded as 8-bit PCM samples at 8 kHz,delta encoding,predictive encoding,GSM encoding,MP3,and so on.RTP provides a header field in which the source can specify the encoding but is otherwise not involved in how encoding is done.
拒绝软译
翻译是自己翻译的,不过,不太熟悉计算机用语,可能有些词语的选择不准确.只是尽力
RPT流传送的每个数据包都会获得一个高于其前者的编码.此编码让目的地来判定是否有数据包丢失.如有数据包丢失,目的地所能采取的最佳行动就是通过插入估算缺失值.由于转发数据包有可能到达太迟而没有用,转播可能不是唯一的选择.结果就是,RPT没有流控制,没有差错控制,没有确认,没有机制要求转播.
每个RPT的有效载荷可能包含多个样本,它们可能以应用需要的任何方式编码.考虑到交互工作,RPT定义了一些文件（如,一个单一的音频流）,每一个文件都允许多个编码格式.例如,一个单一的音频流可能编码为8千赫 8位PCM样本,三角编码、预制编码、GSM编码、MP3等.RPT提供了一个标题字段供来源指定编码,但并不能参与编码过程.
RPT流传送的每个数据包都会获得一个高于其前者的编码.此编码让目的地来判定是否有数据包丢失.如有数据包丢失,目的地所能采取的最佳行动就是通过插入估算缺失值.由于转发数据包有可能到达太迟而没有用,转播可能不是唯一的选择.结果就是,RPT没有流控制,没有差错控制,没有确认,没有机制要求转播.
每个RPT的有效载荷可能包含多个样本,它们可能以应用需要的任何方式编码.考虑到交互工作,RPT定义了一些文件（如,一个单一的音频流）,每一个文件都允许多个编码格式.例如,一个单一的音频流可能编码为8千赫 8位PCM样本,三角编码、预制编码、GSM编码、MP3等.RPT提供了一个标题字段供来源指定编码,但并不能参与编码过程.