TW200829010A - Time shifting in video recoder - Google Patents
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- TW200829010A TW200829010A TW95149885A TW95149885A TW200829010A TW 200829010 A TW200829010 A TW 200829010A TW 95149885 A TW95149885 A TW 95149885A TW 95149885 A TW95149885 A TW 95149885A TW 200829010 A TW200829010 A TW 200829010A
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200829010 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種時光平移（time shifting)錄影方 法0 【先前技:銜】 時光平移（time shifting)為現今錄影機的常見功能。使 用者可藉由錄影機的時光平移功能回顧剛剛錯過的節目 内容。由於時光平移技術僅需儲存之前一段有限時間内的 畫面’因此常用的緩衝為為可循環重複利用儲存空間 型緩衝器（ring buffer)。 < ^第傳統，平移技術使用—環型緩衝器1〇〇 的情形。§錄減的時光平移功缺動時，—影音 完整地整段寫入該環型緩衝器100的一緩衝區 ： 之緩=_中。標誌1()4所標示處為該緩衝㈣， 頭具有該影音信號之資訊，如該影音信號的時^ ί小…等。在接收到使用者要求回顧晝面的命ί 後，播放$會疏該標頭1()4讀取出該緩衝區1()2所二 的影音信號之資訊’再依照這些資訊從頭搜尋該緩衝^ 102，以讀取並且撥放所欲回顧的畫面。 时 然而，在時光平移所能回溯的影音信號之時間長 長時，上述傳統時光平移技術的幾項缺點一一浮現。ς: 十分鐘的時光平移規格為例，假設該緩衝區1〇2所儲二 影音之時間長度為三十分鐘4使用者要求回顧三分= 的晝面(第1圖之標誌106所標示處)，則撥放器必須根： 該標頭104所儲存的資訊，從頭開始搜尋該缓衝區200829010 IX. Description of the Invention: [Technical Field] The present invention relates to a time shifting recording method. [Previous technique: Time shifting] Time shifting is a common function of today's video recorders. The user can review the content of the program just missed by the time shift function of the video recorder. Since the time shifting technique only needs to store the picture for a limited period of time before, the usual buffer is to re-use the storage ring buffer. < ^ The traditional, translational technique uses the case of a ring buffer 1〇〇. § When the recorded time shifting function is missing, the video and audio are completely written in a buffer of the ring buffer 100: slow = _. The symbol 1 () 4 is marked as the buffer (4), and the head has information of the video signal, such as the time of the video signal, etc. After receiving the user's request to review the page's life, the playback $ will sort the header 1 () 4 to read the information of the video signal of the buffer 1 () 2 and then search for the information according to the information. Buffer ^ 102 to read and play the picture to be reviewed. However, when the time of the video signal that can be traced back in time shifting, the shortcomings of the above traditional time shifting technique emerge one by one. ς: For example, the ten-minute time shift specification is as follows. Suppose that the time length of the second video stored in the buffer 1〇2 is 30 minutes. 4 The user requests to review the three-point = 昼 face (marked at the sign 106 of Figure 1) ), the player must root: the information stored in the header 104, search for the buffer from the beginning
Client’s Docket N〇.:TW95088GB ^ 夏 TT^ Docket No:0932-A50934-TW/Final /Glorious Tien 5 200829010 至該標諸10 6處。此搜尋過程會浪費許多時間在該標諸 106前的二十七分鐘影音資料上。因此，時光平移所能回 溯的影音信號之時間長度愈長，此回溯過程會愈耗時。此 外，上述傳統時光平移技術的另一項缺點是不能準確回溯 至所欲回溯的時間點。由於影音信號乃經過壓縮後方儲存 至該環型緩衝器100，檔案的大小與影音信號的複雜度有 關。因此，很難從檔案的大小推估出該緩衝器102之不同 位置所儲存的影音資料之正確時間索引。這項問題在時光 平移所能回溯的影音信號之時間長度愈長時愈明顯。 【發明内容】 本發明提供一種新穎的時光平移錄影技術。此技術在 影音回溯時不僅速度快並且準確。 本發明所提供之時光平移錄影方法所使用的緩衝器 為一環型緩衝器。在儲存一影音信號前，本方法會先判斷 該影音信號之時間長度。在該影音信號的時間長度不大於 一額定時間長度時，本發明會根據一可寫入指標將該影音 信號寫入該環型緩衝器的一緩衝區中。在該影音信號的時 間長度大於該額定時間長度時，本發明會依照該額定時間 長度切割該影音信號，並且根據該可寫入指標將切割後所 得的數段影音資料依序寫入該環型緩衝器的複數個緩衝 區中。上述緩衝區各自所儲存的影音資料之最大時間長度 為該額定時間長度；並且上述緩衝區各自具有一標頭，用 以記錄所屬之缓衝區所儲存的影音資料之時間索引以及 檔案大小。 此外，本方法更包括在該影音信號寫入該環型緩衝器Client’s Docket N〇.:TW95088GB ^ Summer TT^ Docket No:0932-A50934-TW/Final /Glorious Tien 5 200829010 To the standard 10 6 places. This search process wastes a lot of time on the twenty-seven minutes of video material before the mark 106. Therefore, the longer the time length of the video signal that can be traced back by the time shift, the more time consuming this backtracking process will be. In addition, another disadvantage of the above conventional time shifting technique is that it cannot be accurately traced back to the point in time to be traced back. Since the video signal is compressed and stored in the ring buffer 100, the size of the file is related to the complexity of the video signal. Therefore, it is difficult to estimate the correct time index of the video material stored in different positions of the buffer 102 from the size of the file. This problem becomes more apparent as the length of the video signal that can be traced back in time shifting is longer. SUMMARY OF THE INVENTION The present invention provides a novel time shifting video recording technique. This technology is not only fast and accurate in video playback. The buffer used in the time-shifting video recording method provided by the present invention is a ring type buffer. Before storing a video signal, the method first determines the length of time of the video signal. When the length of the video signal is not longer than a nominal time length, the present invention writes the video signal into a buffer of the ring buffer according to a writable index. When the length of the video signal is greater than the rated time length, the present invention cuts the video signal according to the rated time length, and sequentially writes the pieces of video and audio data obtained after cutting according to the writable index into the ring type. Multiple buffers in the buffer. The maximum length of the video data stored in each of the buffers is the nominal length of time; and each of the buffers has a header for recording the time index of the audio and video data stored in the buffer to which it belongs and the file size. In addition, the method further includes writing the video signal to the ring buffer
Client’s Docket No.:TW95088GB TT5s Docket No:0932-A50934-TW/Final /Glorious Tien 6 200829010 後調整該可寫入指標，以確保 二 入該環型緩衝器。由於該環 ，影音信號得以接續寫 循環重複利用，本方法更包括^厂态所提供的儲存空間可 存空間被重複使用時，調整〜=環型緩衝器所提供的儲 該環型緩衝器的影音信號得 2指標’以確保儲存於 為讓本發明之上述和其他=確讀取。 顯易懂，下文特舉出較佳實、^寺敛、和優點能更明 說明。 亚配合所附圖式作詳細 【實施方式】 本發明所採用的緩衝器為—产 口口 态所提供的儲存空間可循環重^ 、是衝态。该環型緩衝 之傳統時光平移技術，本發明笋 ，較於第1圖所示 儲存的影音資料之時間長度3^吸制母一個緩衝區所能 溯。 ^到快速且準確的影音回 社不發明的一實施例中，—俨刑… 衝區所能儲存的影音資料之衝器内的每一個緩 時間長度。若一影音信號的時間^二白不能超過一額定 度，本發明會依照該額定時間長声於該額定時間長 根據-可寫入指標將切割後所;:亥旦影號’並且 入該環型緩衝器的複數個緩衝區中，1衫 '貝料依序寫 進先出演算法記錄該數段影音資料。二^型緩衝器使用先 一標頭，用以記錄所屬之緩衝區所儲存具有 索引以及檔案大小’以作為影音回搜尋=?夺間Client’s Docket No.: TW95088GB TT5s Docket No:0932-A50934-TW/Final /Glorious Tien 6 200829010 Adjust the writable indicator to ensure that the ring buffer is doubled. Due to the ring, the video signal can be reused for repeated use in the write cycle. The method further includes adjusting the memory space provided by the factory state to be reused, and adjusting the ring buffer provided by the ring buffer. The video signal has 2 indicators 'to ensure that the above and other = true readings are made for the present invention. It is easy to understand, the following is a better example, the convergence of the temple, and the advantages can be more clearly explained. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The buffer used in the present invention is a storage space that can be circulated and is in a state of being flushed. The conventional time shifting technique of the ring type buffer, the length of the bamboo shoots of the present invention can be traced back to the buffer length of the stored video data as shown in Fig. 1. ^ In an embodiment where the fast and accurate video is not invented, the suffocation... The length of each of the buffers of the audio and video data that can be stored in the rush zone. If the time of a video signal is not more than one rated degree, the present invention will follow the rated time for a long time according to the rated time. According to the -writable index, the image will be cut; In the plurality of buffers of the type buffer, the 1 shirt's material is sequentially written into the first-out algorithm to record the plurality of video and audio data. The second type buffer uses the first header to record the index and file size stored in the buffer to which it belongs.
Clients Docket N〇.；TW95088GB TT?s Docket No：〇932-A50934-TW/Final /Glorious 入指標，—下-筆影音信心r入調該r型可4Clients Docket N〇.;TW95088GB TT?s Docket No:〇932-A50934-TW/Final /Glorious Into the indicator,-down-pen audio and confidence confidence r in the r-type can be 4
Client s Docket N〇.；TW95088GB 、 訂 200829010 器。由於本發明所使用的緩衝器為 影音資料可能會覆蓋到之前寫入的：立新寫入的 法在寫入影音資料至該環型 办9貝枓。因此，本方 整-可讀取指標，以確保儲存於該;的型 得以被正確讀取。 圭緩衝⑽的衫音貢料 第2圖以分解步驟圖解本發明每 ;袠型緩衝器在三個不同階段時的狀況二列 圖請顯示一環型緩衝器尚未 ： ^-可㈣指標R以及—可寫人指標w所標諸的^^ 弟2圖之貫施例所採用的額定時 、 型缓衝器的儲存空間足以儲存二+八二二刀釦，整個環 230圖解-時間長度為三十分二:二的二音資料。圖形 器中的儲存狀況》由於每一個緩衝區；二=%型缓衝 之日才間長度不付起過五分鐘，因此必須將 + 五分鐘切割成-段資料，依序儲存至緩衝區、日1母隔 2〇6、2〇8、21()、與212。該等緩衝區2()2、2() = 210與212各自具有一標頭加、2〇3、2〇5、2〇7、2 8盘 2U’用以記錄所屬之緩衝區所儲存的影音 ^ 引以及樓案大小。相較於第i圖所描述 ^ ^ 術，本實施例若欲回顧三分鐘前的畫面(標認技 處），僅需從第六個緩衝器212之样瓸911 _ ^不不 212所儲存的影音資料之相關資訊，並且根;dJ衝器 尋該缓衝器212，即可很快找到r分f A 乂二貝訊搜 ^ 刀產里刖的晝面。相鲂於 弟1圖所描述之傳統時光平移技術需要花費大力 巧請之前的二十七分鐘影音資料上，本發明僅需：： 哥標諸216之前的兩分鐘影音資料即可 八太、， j 一^刀袭审月1丨Client s Docket N〇.; TW95088GB, book 200829010. Since the buffer used in the present invention may be overwritten by the audio and video material: the new write method is to write the video data to the ring type. Therefore, the whole can read the indicator to ensure that the type stored in it is correctly read. Figure 2 shows the phoning tribute of the quilt buffer (10). The decomposition diagram illustrates the present invention. The condition of the 缓冲器-type buffer at three different stages is shown in the second column diagram. A ring-shaped buffer has not yet been shown: ^- (4) indicator R and The nominal time and type of buffer used in the application example of the writable person indicator w is sufficient to store two + 82 knife buckles, and the entire ring 230 is illustrated - the length of time is three Twenty two: two second sound data. The storage status in the graphics device is due to each buffer; the length of the second =% buffer is not paid for five minutes, so +5 minutes must be cut into - segment data, and then stored in the buffer, Day 1 is separated by 2〇6, 2〇8, 21(), and 212. The buffers 2() 2, 2() = 210 and 212 each have a header plus, 2〇3, 2〇5, 2〇7, and 2 8 disks 2U' for recording the buffers stored therein. Video and audio ^ and the size of the building. Compared with the description of the figure i, in this embodiment, if we want to review the picture (marking technology) three minutes ago, it only needs to be stored from the sixth buffer 212 911 _ ^ not 212 Related information of the audio and video materials, and root; dJ punch to find the buffer 212, you can quickly find r points f A 乂 贝 贝 搜 搜 搜 。 。 。 。 。 。 。 。 。 。 。 。 The traditional time shifting technique described in the picture of the brother 1 needs to spend a lot of time on the 27-minute audio and video material. The invention only needs to:: The two-minute audio and video material before the 216 can be eight too, j 一^刀击审月1丨
Client’s Docket N〇.:TW95088GB 4 J TT5s Docket No:0932-A50934-TW/Final /Glorious_Tien 8 200829010 5面（標諸216處），大大地縮短了搜尋影音資料所需要的 日守間。此外’由於每—個緩衝區所能儲存的影音資料之時 間長度有限，因此搜尋的準確度也就相對提高了許多。 ^ ^較圖形220與230可以發現該可寫入指標W會隨 著:^衣型，衝斋的貪料寫人狀況變動，以令下—筆影音信 號得以接續寫入該環型緩衝器。 ^ 圖形240顯不又寫入一 4分鐘長影音信號至該環型緩 衝、口 σ k Θ環型緩衝器的儲存狀態。由於此影音信號並未 超過五分鐘(額定時間長度），故可寫在單-個緩衝區中（緩 衝區214)假叹此4分鐘影音信號的複雜度很高，經壓縮 後的棺案大小很大，必須利用到緩衝區2Q2的儲存空間。 如圖形240所示，緩衝區叫覆蓋到緩衝區2〇2，導致緩 衝區202本來儲存的信號無效，故該可讀取指標&必須做 ，當地修改。如圖形24G所示，該可讀取指標R由R。所 標二處改指向下-個緩衝區綱，以麵儲存於該環型緩 衝器的影音資料得以被正確讀取。此外，隨著此4分鐘影 音貧料寫人該環形緩衝器，可讀取指標w也必須作適當 f變。如圖形240所示，可讀取指標W由W。所標示處改 接續寫入該環形緩衝器處確保下—絲音信號得以 第3圖為本發明之時光平移錄影方法的一實施例之流 私圖。日守光平移錄影功能被啟動後，步”驟地與So#八 別將該環型緩衝ϋ與-影音編解碼器、初始化。在步驟^ 中，錄影機會自外界取得—影音信號並且視該影音信號 類型解碼該影音信號。該影音信號可為由—電視卡所^取 到的電視信號、或-影音光碟（如DVD)之信號、或其他任Client’s Docket N〇.: TW95088GB 4 J TT5s Docket No:0932-A50934-TW/Final /Glorious_Tien 8 200829010 5 faces (labeled 216), greatly shortening the daily guard required for searching audio and video data. In addition, since the length of video and audio data that can be stored in each buffer is limited, the accuracy of the search is relatively improved. ^ ^ Compared with the graphs 220 and 230, it can be found that the writable index W will change with the following: the type of the craving writer, so that the next-ply video signal can be successively written into the ring buffer. ^ The graphic 240 does not write a 4-minute long video signal to the storage state of the ring buffer and the port σ k Θ ring type buffer. Since the video signal does not exceed five minutes (rated time length), it can be written in a single buffer (buffer 214). The complexity of the 4 minute video signal is high, and the compressed file size is compressed. Very large, you must use the storage space of the buffer 2Q2. As shown in the figure 240, the buffer is called to cover the buffer 2〇2, which causes the signal originally stored in the buffer 202 to be invalid, so the readable index & must be done and modified locally. As shown in Figure 24G, the readable index R is R. The two targets are redirected to the next buffer, and the audio and video data stored in the ring buffer can be read correctly. In addition, as the 4 minute video is written to the ring buffer, the readable index w must also be appropriately f changed. As shown in graph 240, the index W can be read by W. The marked change is continued to be written to the ring buffer to ensure the lower-silver signal. Figure 3 is a flow diagram of an embodiment of the time shifting video recording method of the present invention. After the Shouguang optical panning function is activated, the step is “suddenly with So# and the ring buffer buffer and the video codec are initialized. In step ^, the video is taken from the outside world—the video signal and the video signal The video signal type decodes the video signal, and the video signal can be a television signal obtained by a television card, or a signal of a video disc (such as a DVD), or other
Client’s Docket No.:TW95088GB TT5s Docket No:0932-A50934-TW/Final /Glorious TienClient’s Docket No.: TW95088GB TT5s Docket No:0932-A50934-TW/Final /Glorious Tien
一 Q 200829010 何影音信號。之後，步骤308將壓縮該影音信號以降低該 影音信號的檔案大小。步驟310判斷該影音信號之時間長 度是否大於一額定時間長度。若該影音信號之時間長度大 於該額定時間長度，則執行步驟312，依照該額定時間長 度將該影音信號切割成數段影音資料，並且根據一可寫入 指標依序寫入該環型解碼器的複數個緩衝區中。若該影音 信號之時間長度不大於該額定時間長度，則執行步驟 314，將該影音信號根據該可寫入指標寫入該環型解碼器 内的一個緩衝區中。上述步驟312與314，在影音資料寫 # 入該環型緩衝器後，皆必須適當地調整該可寫入指標以及 一可讀取指標，以正確標示該環型緩衝器目前可讀取的區 段以及可再寫入資料的地方。上述緩衝區各自具有一標 頭，用以記錄所屬之緩衝區所儲存的影音資料之時間索引 以及檔案大小，以作為影音回溯時搜尋檔案的根據。 此外，若時光平移的規格改變（例如使用者希望能夠 回溯更久之前的影音信號），本發明僅需在步驟302(初始 化該環型緩衝器）時稍作修改即可達到。 本發明雖以較佳實施例揭露如上，然其並非用以限定 本發明的範圍，任何熟習此項技藝者，在不脫離本發明之 精神和範圍内，當可做些許的更動與潤飾，因此本發明之 保護範圍當視後附之申請專利範圍所界定者為準。A Q 200829010 He Yingyin signal. Thereafter, step 308 compresses the video signal to reduce the file size of the video signal. Step 310 determines whether the time length of the video signal is greater than a nominal time length. If the time length of the video signal is greater than the rated time length, step 312 is performed, the video signal is cut into several pieces of video data according to the rated time length, and the ring decoder is sequentially written according to a writable index. In multiple buffers. If the length of the video signal is not longer than the rated time length, step 314 is executed to write the video signal into a buffer in the ring decoder according to the writable index. In the above steps 312 and 314, after the audio and video data is written into the ring buffer, the writable index and a readable index must be appropriately adjusted to correctly mark the currently readable area of the ring buffer. Segments and places where data can be rewritten. Each of the buffers has a header for recording the time index of the audio and video data stored in the buffer to which it belongs and the file size, as a basis for searching for files when the video is backtracked. In addition, if the specification of the time shift is changed (e.g., the user desires to be able to trace back the video signal before the longer time), the present invention can be achieved with only minor modifications in step 302 (initializing the ring buffer). The present invention has been described above with reference to the preferred embodiments thereof, and is not intended to limit the scope of the present invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.
Client’s Docket N〇.:TW95088GB TT^ Docket No:0932-A50934-TW/Final /Glorious Tien 10 200829010 【圖式簡單說明】 ，1圖圖解傳統時光平移錄影方法的一實施例； 第2圖圖解本發明一實施例的三個階段；以及 第3圖為本發明一實施例的流程圖。 【主要元件符號說明】 100〜環型緩衝器； 102〜緩衝區； 1〇4〜標頭； 106〜標誌前三分鐘的影音位置； 2〇卜 203、205、207、209與211〜標頭； 2〇2、204、206、208、210、212 與 214〜緩衝器； 216〜標誌前三分鐘的影音位置； 220〜未寫入影音資料的環型緩衝器； 230〜寫入—30分鐘影音信號的環型麟器； 240〜在_ z3〇 _ ’更寫入—4分鐘影音信號的環型緩衝器； R〜可讀取指標； W〜可寫入指標； 302〜環型緩衝器初始化； 304〜編解碼器初始化； 306〜取得影音信號； 308〜壓縮該影音信號； 是否大於一額定時間長度； 影音信號，以寫入該環型缓 310〜判斷該影音信號之時間長度 312〜依照該額定時間長度切割該 衝器之複數個緩衝區中；以及 314〜將該影音信號寫入一緩衝區Client's Docket N〇.: TW95088GB TT^ Docket No:0932-A50934-TW/Final /Glorious Tien 10 200829010 [Simplified Schematic], Figure 1 illustrates an embodiment of a conventional time-shifting video recording method; Figure 2 illustrates the present invention. Three stages of an embodiment; and Figure 3 is a flow chart of an embodiment of the invention. [Main component symbol description] 100 ~ ring buffer; 102 ~ buffer; 1 〇 4 ~ header; 106 ~ mark the first three minutes of video and audio position; 2 〇 203, 205, 207, 209 and 211 ~ header ; 2〇2, 204, 206, 208, 210, 212 and 214~ buffer; 216~ mark the first three minutes of video and audio position; 220~ ring type buffer without audio and video data; 230~ write—30 minutes Ring-shaped speaker for audio and video signals; 240~ ring-shaped buffer for _z3〇_ 'more write- 4 minutes video signal; R~ readable index; W~ writable indicator; 302~ ring buffer Initialization; 304~ codec initialization; 306~ obtain video signal; 308~ compress the video signal; whether it is greater than a rated time length; video signal to write the ring type buffer 310~ determine the time length of the video signal 312~ Cutting a plurality of buffers of the punch according to the rated length of time; and 314~ writing the video signal to a buffer
Client’s Docket N〇.:TW95088GB TT，s Docket No:0932-A50934-TW/Flnal /Gi0r咖s_TienClient’s Docket N〇.:TW95088GB TT,s Docket No:0932-A50934-TW/Flnal /Gi0r s_Tien
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| TW95149885A TWI321952B (en) | 2006-12-29 | 2006-12-29 | Time shifting in video recoder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102723086A (en) * | 2011-05-05 | 2012-10-10 | 新奥特（北京）视频技术有限公司 | Method for intelligent updated playing of image-text animation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102723086A (en) * | 2011-05-05 | 2012-10-10 | 新奥特（北京）视频技术有限公司 | Method for intelligent updated playing of image-text animation |
| CN102723086B (en) * | 2011-05-05 | 2017-04-12 | 新奥特（北京）视频技术有限公司 | Method for intelligent updated playing of image-text animation |
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