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    • 9. 发明申请
    • Transcoding apparatus and method for distributed multimedia transmission network provided with transcoder
    • 具有代码转换器的分布式多媒体传输网络的转码装置和方法
    • US20060168323A1
    • 2006-07-27
    • US11179855
    • 2005-07-12
    • Chan-Yul KimSung-Jin ParkChang-Sup ShimYun-Je OhJun-Ho Koh
    • Chan-Yul KimSung-Jin ParkChang-Sup ShimYun-Je OhJun-Ho Koh
    • G06F15/173
    • H04L29/06027H04L65/605H04L65/607
    • Disclosed is a transcoding method and apparatus for a mobile communication system provided with a transcoder. The transcoding method includes receiving a request for media content and codec information required for the requested media content, receiving the requested media content from a media content server and determining whether the received codec information exists, transformatting a format of the received media content by a codec of the codec information if the received codec information exists, searching the codec list and installing the codec information and transformatting the format of the received media content using the installed codec, determining whether a transmission bandwidth through which the transformatted media content are transmitted is smaller than a bandwidth of the transformatting codec, transrating the format of the media content by a codec suitable for the transmission bandwidth if the transmission bandwidth is smaller than the bandwidth of the transformatting codec, and transmitting the transrated media content.
    • 公开了一种具有代码转换器的移动通信系统的代码转换方法和装置。 代码转换方法包括接收对所请求的媒体内容所需的媒体内容和编解码器信息的请求,从媒体内容服务器接收所请求的媒体内容,并确定是否存在所接收的编解码器信息,通过编解码器转换所接收的媒体内容的格式 如果接收到的编解码信息存在,搜索编解码器列表并安装编解码器信息并使用安装的编解码器对接收到的媒体内容的格式进行变换,确定发送转换的媒体内容的传输带宽是否小于 变换编解码器的带宽,如果传输带宽小于转换编解码器的带宽,则通过适用于传输带宽的编解码器来转换媒体内容的格式,以及传输转换的媒体内容。
    • 10. 发明申请
    • Apparatus and method for compensating for PCR and data rate
    • 用于补偿PCR和数据速率的装置和方法
    • US20060120383A1
    • 2006-06-08
    • US11296618
    • 2005-12-07
    • Sang-Ho KimJae-Hun ChoChang-Sup ShimYun-Je OhJun-Ho Koh
    • Sang-Ho KimJae-Hun ChoChang-Sup ShimYun-Je OhJun-Ho Koh
    • H04L12/56H04L12/28
    • H04N21/4305
    • A method and apparatus by which a reception device of a communication system can sense and compensate for an error of a program clock reference (PCR), and can sense and compensate for bit rate variation of transmission data in a transmitted MPEG-2 TS. The method and apparatus compensates for a PCR jitter, or a change in a data bit rate, which may occur in processing an MPEG-2 TS in a reception device of the MPEG-2 TS transmission system, thereby preventing the deterioration of image quality due to the jitter or loss of an input MPEG-2 TS data. The apparatus includes a PAT sensing unit for sensing a PAT from a received MPEG-2 TS, a PMT sensing unit for sensing a PMT based on information provided from the PAT sensing unit, a PCR PID unit for sensing a PCR PID based on information provided from the PMT sensing unit and a PCR data unit for outputting a PCR data based on information provided from the PMT sensing unit and PID information provided from the PCR PID unit. The apparatus also includes a PCR comparison/compensation unit receiving the PCR data from the PCR data unit, comparing the received PCR data with a pre-stored PCR data, and compensating for the pre-stored PCR data, and a data rate comparison/compensation unit for receiving data rate information from the PCR data unit, comparing the received data rate with a pre-stored data rate, and compensating for the pre-stored data rate.
    • 通信系统的接收装置可以感测和补偿程序时钟参考(PCR)的错误的方法和装置,并且可以感测和补偿所发送的MPEG-2TS中的传输数据的比特率变化。 所述方法和装置补偿在MPEG-2 TS传输系统的接收装置中处理MPEG-2 TS时可能发生的PCR抖动或数据比特率的变化,从而防止由于MPEG-2 TS传输系统的接收装置的劣化 输入MPEG-2 TS数据的抖动或丢失。 该装置包括用于从接收的MPEG-2 TS感测PAT的PAT感测单元,用于基于从PAT感测单元提供的信息来感测PMT的PMT感测单元,用于基于提供的信息感测PCR PID的PCR PID单元 来自PMT感测单元和PCR数据单元,用于基于从PMT感测单元提供的信息和从PCR PID单元提供的PID信息输出PCR数据。 该装置还包括PCR比较/补偿单元,从PCR数据单元接收PCR数据,将接收的PCR数据与预先存储的PCR数据进行比较,并补偿预存的PCR数据,以及数据比率比较/补偿 单元,用于从PCR数据单元接收数据速率信息,将接收到的数据速率与预先存储的数据速率进行比较,并补偿预存的数据速率。