发明名称 |
Method and apparatus for outputting video frames while changing channels with digital broadcast receiver |
摘要 |
A method and apparatus for outputting video frames while changing channels using a digital broadcast receiver are provided. The method includes sequentially tuning to a plurality of channels and receiving a plurality of digital broadcast signals from the respective channels; extracting a plurality of video frames from the respective digital broadcast signals and storing the video frames; receiving a digital broadcast signal from a desired channel to be tuned upon receiving a channel-change command; and outputting at least one of the stored video frames before a digital broadcast signal of the desired channel is output. |
申请公布号 |
US8875200(B2) |
申请公布日期 |
2014.10.28 |
申请号 |
US200812016426 |
申请日期 |
2008.01.18 |
申请人 |
Samsung Electronics Co., Ltd. |
发明人 |
Park Min-Kyu |
分类号 |
H04N5/50;H04N21/438;H04N21/426 |
主分类号 |
H04N5/50 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC |
主权项 |
1. A method of outputting video frames while changing channels using a digital broadcast receiver, the method comprising:
sequentially tuning to a plurality of channels and receiving a plurality of digital broadcast signals from the respective channels; extracting a plurality of video frames from the respective digital broadcast signals and storing the video frames; receiving a digital broadcast signal from a desired channel to be tuned upon receiving a channel change command; outputting at least one of the stored video frames before a digital broadcast signal of the desired channel is output; determining whether a video frame extracted from the digital broadcast signal of the desired channel is an intra-frame or an inter-frame; if it is determined that the extracted video frame is an intra-frame, decoding the intra-frame without reference to the stored video frames and outputting the decoded intra-frame; if it is determined that the extracted video frame is an inter-frame, decoding the inter-frame without converting the inter-frame into an intra-frame, detecting an error of the decoded inter-frame, and correcting the detected error by performing an error-concealment operation; and skipping outputting the decoded inter-frame if a degree of picture-quality degradation of the decoded inter-frame caused by the error-concealment operation is higher than a reference level. |
地址 |
Suwon-si KR |