摘要：
Due to the amount of 4Kvideo data is large, and the traditional CPU software decoder technology cannot meet the performance requirement. The 4K video playback system based on combination of hard and soft decoding mode is designed, which uses DirectShow and CUDA hardware decoding technology. And the system includes functions of hardware system information acquisition, video source reader, video hard decoding, and video display. Experimental results show that this system can achievegood effect and greatly reduce the CPU occupancy rate when playing 4K video.%針對(duì)4K視頻數(shù)據(jù)量很大,傳統(tǒng)的CPU軟件解碼技術(shù)無法滿足性能要求.設(shè)計(jì)了一種軟硬結(jié)合解碼方式的4K視頻播放系統(tǒng),采用DirectShow和NVIDIA CUDA技術(shù)進(jìn)行GPU硬件解碼.系統(tǒng)功能包括硬件系統(tǒng)信息獲取,視頻源讀取,視頻硬解碼和視頻顯示.實(shí)驗(yàn)結(jié)果表明,此播放系統(tǒng)在進(jìn)行4K視頻解碼播放時(shí),既保障了視頻效果,又極大降低了CPU使用率.
摘要：
目前市場上支持視頻圖像處理功能的軟件雖然多種多樣，但通常涉及行業(yè)背景，應(yīng)用范圍狹窄，開放的視頻圖像處理組件在容錯(cuò)或安全性上表現(xiàn)一般，因此有必要?jiǎng)?chuàng)新和開發(fā)特定功能的視頻處理組件。該設(shè)計(jì)基于DirectShow架構(gòu)，開發(fā)出具有視頻處理功能的Filter組件，具有本地圖片疊加入視頻流、視頻編碼格式轉(zhuǎn)換、截取畫面保存為本地圖像等功能?？稍谝曨l圖像傳遞過程中對(duì)圖像進(jìn)行實(shí)時(shí)處理、添加信息、優(yōu)化或保存畫面等，使人們以更加靈便的方式獲取、使用或傳播視頻信息。測試結(jié)果表明，該組件可應(yīng)用于廣播電視傳輸或視頻采集時(shí)的圖像處理，甚至應(yīng)用于美顏相機(jī)或PC攝像頭的趣味疊圖等，應(yīng)用范圍廣泛，平臺(tái)兼容性強(qiáng)，填補(bǔ)了市場上該類產(chǎn)品的類型和功能短缺。%The software supporting video image processing function is various on the market,but it has narrow application range due to the industry background. And the opened video image processing module has poor performance on fault tolerant or security,so it is necessary to innovate and develop the video processing module with specific function. The Filter module with video processing function was developed based on DirectShow framework,which has the functions of local image added into video streaming,video coding format transform,and extracting frames saved as the local image. The module can realize the operations of real?time processing,information adding,frames optimization or frames preservation for the image in video image transfer pro?cess,so people can acquire,use or transmit video information with more flexible way. The test results show that the module can be applied to radio and television transmission or image processing while video collection,and beauty camera or funny overlay of PC camera. The module has wide application range and good platform compatibility,which filled the type and function shortage of this product on the market.
摘要：
非編制作在廣電行業(yè)中越來越普及,文件化制作中經(jīng)常需將SDI信號(hào)采集編碼為視音頻文件,針對(duì)價(jià)格不菲的非編采集系統(tǒng),我們通過DirectShow、FFmpeg技術(shù),結(jié)合DeckLink Mini Recorder采集卡,開發(fā)了一個(gè)低成本的,可實(shí)時(shí)采集、編碼高清SDI信號(hào)的系統(tǒng),并將方案在文中分享.
摘要：
由于嵌入式系統(tǒng)的系統(tǒng)資源的有限性，系統(tǒng)上的攝像頭設(shè)備多通過插值等方法獲得偽高分辨率，無法滿足文字識(shí)別應(yīng)用的需求。為解決這個(gè)問題，文章首先分析了S3C6410嵌入式處理器的camera模塊接口的特性，介紹其與CMOS攝像頭的硬件連接方法，并在Windows CE6.0操作系統(tǒng)上采用DirectShow技術(shù)設(shè)計(jì)并實(shí)現(xiàn)了500萬像素高分辨率攝像頭驅(qū)動(dòng)。通過實(shí)驗(yàn)進(jìn)行驗(yàn)證分析，結(jié)果表明該攝像頭驅(qū)動(dòng)運(yùn)行穩(wěn)定，對(duì)其獲得的文字圖片進(jìn)行識(shí)別，測試結(jié)果顯示識(shí)別率達(dá)到99.5%。%On account of the limitation of system resources in embedded platforms,methods like interpolation are commonly applied to obtain pseudo-high-resolution images,but which cannot meet the requirements of character recognition. In order to solve this problem,the thesis ifrstly analyzes the camera module interface features of the embedded processor S3C6410,and then introduces the connection method between the camera module interface and CMOS camera hardware. With the application of DirectShow technology in Windows CE6.0,the driver for high-resolution cameras(up to 5 million pixels)has been developed.A veriifcation experiment has been conducted and the result indicates that the camera driver has both high reusability and high stability.A testing experiment has been conducted to verify the high resolution and the result shows that the recognition rate is up to 99.5%.
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