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    • 3. 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。
    • 7. 发明授权
    • MPEG-2 decoding system and method
    • MPEG-2解码系统及方法
    • US07400652B2
    • 2008-07-15
    • US10861205
    • 2004-06-04
    • Kwan-Lae KimSung-Jin ParkJun-Ho KohYoung-Seok KimYun-Je Oh
    • Kwan-Lae KimSung-Jin ParkJun-Ho KohYoung-Seok KimYun-Je Oh
    • H04H20/28H04H11/02
    • H04N21/4383H04N5/4401H04N21/4334H04N21/434H04N21/4345H04N21/4384
    • In an MPEG-2 decoding system, a transport decoder decodes a transport packet corresponding to a Program Identification (PID) from an input transport stream, and retrieves a Program Association Table/Program Map Table PAT/PMT) from the stream when it is requested to retrieve Program Specific lnformation (PSI). A pre-decoder checks PSI stored in a PSI memory in response to a request to change to a desired channnel, reads PIDs of transport packets for a Packetized Elementary Stream (PES) of a program corresponding to the desired channel from the PSI memory to provide it to the transport decoder, receives the PAT/PMT and updates the contents of the memory using the PAT/PMT. After decoding, PSI previously extracted therefrom is stored in the memory. PIDs of transport packets for the PES of desired program are obtained referring to the stored PSI, and transport packets having the PIDs are retrieved and decoded.
    • 在MPEG-2解码系统中,传输解码器从输入传输流解码对应于节目识别(PID)的传输分组,并且在请求时从流中检索节目关联表/节目映射表PAT / PMT) 检索程序特定信息(PSI)。 响应于要改变到所需信道的请求,预解码器检查存储在PSI存储器中的PSI,从PSI存储器读取对应于期望信道的节目的分组化基本流(PES)的传输分组的PID,以提供 它到传输解码器,接收PAT / PMT,并使用PAT / PMT更新存储器的内容。 在解码之后,先前提取的PSI被存储在存储器中。 通过存储的PSI获得所需节目的PES的传输分组的PID,并且检索并解码具有PID的传输分组。