会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 7. 发明申请
    • TRICK PLAY SIGNAL GENERATION FOR A DIGITAL VIDEO RECORDER
    • 数字视频录像机的快速播放信号生成
    • WO9965239A3
    • 2000-03-09
    • PCT/IB9901015
    • 1999-06-03
    • KONINKL PHILIPS ELECTRONICS NVPHILIPS SVENSKA AB
    • EERENBERG ONNORIJCKAERT ALBERT M ABRUELS WILHELMUS H A
    • H04N5/7826H04N5/783H04N5/92H04N7/32H04N9/804H04N9/82
    • H04N5/783H04N5/78263H04N9/8042H04N9/8227
    • The invention relates to the generation of a trick play information stream from a normal play information stream, so that they can be recorded together as a composite information stream on the record carrier, such that upon reproduction in a trick play reproduction mode, an information signal of sufficient quality, e.g. as regards visibility, can be obtained. One aspect of the invention lies in the generation of GOPs, each GOP comprising an I-frame retrieved from the original normal play information stream, and one or more so-called "empty P frames". Another aspect of the invention is the requirement of generating GOPs for the trick play information stream that have a constant bitcost per GOP. Again another aspect of the invention lies in the retrieval of the I-frame for the trick play information stream from the normal play information. More specifically, an I-frame is generated by retrieving from an I-frame included in the normal play information, the DC coefficient of the I-frame and a number of AC coefficients from that I-frame and generate the I-frame for the trick play information stream therefrom. More specifically, the number of AC coefficients for an I-frame of the trick play information signal depends on the difference between the DC coefficients of two subsequent I-frames in the normal play information from which the I-frame to be generated and the just previously generated I-frame for the trick play information signal have been derived.
    • 本发明涉及从正常播放信息流生成特技播放信息流,使得它们可以作为复合信息流一起记录在记录载体上,使得在特技播放再现模式下再现信息信号 质量足够,例如 关于可视性,可以获得。 本发明的一个方面在于GOP的生成,每个GOP包括从原始正常播放信息流检索的I帧以及一个或多个所谓的“空P帧”。 本发明的另一方面是为每个GOP具有恒定比特数的特技播放信息流产生GOP的要求。 本发明的另一方面在于从正常播放信息中检索特技播放信息流的I帧。 更具体地说,通过从包含在正常播放信息中的I帧,I帧的DC系数和来自该I帧的AC系数的数量进行检索,生成I帧,并生成I帧 特技播放信息流。 更具体地,特技播放信息信号的I帧的AC系数的数量取决于要生成的I帧和正常播放信息的正常播放信息中的两个后续I帧的DC系数之间的差异 已经导出了用于特技播放信息信号的先前产生的I帧。