A7 B7 416229 五、發明説明（1 ) 【技術領域】 却- 先 閱 讀 r 面 I 事 項 再 η 本 1 本發明係關於一種將所攝取後的動畫資訊逐次送住主 機裝置之監視~用攝影機，fll如有關適用於視訊會議系統或 視訊電話等之影像解壓縮裝置之資料處理系統之技術’亦 即爲了能夠在受限的帶域中傳送影像資訊，而藉由硬體或 軟體來壓縮處理影像資訊，以及藉由軟體來對壓縮資料進 行解壓縮處理。 【技術背景】 訂 本發明者係針對經由個人電腦的外部介面所被連接之 監視用攝影機方面加以檢討。連接個人電腦與周邊機器的 介面，例如有 U S B (Universal Serial Bus),SCSI(Small Computer System Interface),IrDA(Infrared Data Association) ，RS23 2C等。其中，U S B爲串列資料傳送的規格，資料傳 送的速度爲1 2Mb p s。USB的規格書（REV 1 . 0 )係出版於1 9 '9 5年1 1月1 3日- 一般/影像資訊的幀率只要有2 5 Η z即可，例如 C I F (Common Intermediate Format)的情況時，1 個幢 的畫像大小爲3 5 2 X 2 8 8像素。此外，若畫像資料格 式爲4: 2 ： 0時（每1像素的亮度資料爲8位元，每1 像素的色差資料爲4位元）所必須傳送的影像資訊的資料 量約爲29Mbps。但，例如上述之USB的資料傳送 速度爲12Mbps ，因此若使用USB來傳送影像資訊 時，以監視用攝影機所攝取的影像資料就必須施以壓縮或 本紙張尺度適用中國國家標车（CNS ) A4規格（2丨0X297公釐） -4 - 416229 at __ B7 五、發明説明) 間隔處理。例如，若將壓縮率設定爲1 /4時，資料量將 形成7 . 3Mbps，而得以滿足USB的資料傳送比例 〇 .. 另一方面，若1幀的大小爲CIF的1/4之 Q C I F (Quarter Common Intermediate Format)時，則 不必進行壓縮處理就能滿足U S B的資料傳送速率。藉此 ，若不需要壓縮的話，則只要經由U S B直接將影像資訊 傳送至主機裝置即可，而使得於主機裝置側亦不必進行解 壓縮處理，因而得以縮短資料處理時間及減輕處理器的負 擔。因應於此，監視用攝影機本身必須要能夠選擇影像資 訊的壓縮率。 此外，若利用U S B的規格，則可經由插座來將最多 1 2 7的周邊機器（USB裝置）連接於1個主機裝置。A7 B7 416229 V. Description of the invention (1) [Technical Field] But-Read the r-plane I matters first, then η This 1 The present invention is about a kind of surveillance that sends the captured animation information to the host device one by one ~ using a camera, fll For example, the technology of a data processing system applicable to an image decompression device such as a video conference system or a video phone is to compress and process image information by hardware or software in order to be able to transmit image information in a restricted band. , And software to decompress compressed data. [Technical Background] The present inventors reviewed a surveillance camera connected via an external interface of a personal computer. Interfaces that connect personal computers with peripheral devices, such as U S B (Universal Serial Bus), SCSI (Small Computer System Interface), IrDA (Infrared Data Association), RS23 2C, etc. Among them, U S B is the specification for serial data transmission, and the data transmission speed is 12 Mb p s. The USB specification (REV 1.0) was published on January 19th, 1995.-The frame rate of general / image information only needs to be 2 5 Η z. For example, CIF (Common Intermediate Format) In this case, the image size of one building is 3 5 2 X 2 8 8 pixels. In addition, if the format of the image data is 4: 2: 0 (the brightness data of each pixel is 8 bits, and the color difference data of each pixel is 4 bits), the data volume of the image information must be about 29Mbps. However, for example, the data transfer speed of the aforementioned USB is 12 Mbps. Therefore, if the USB is used to transmit image information, the image data captured by the surveillance camera must be compressed or the Chinese paper standard (CNS) A4 applies to this paper standard. Specifications (2 丨 0X297mm) -4-416229 at __ B7 V. Description of the invention) Interval processing. For example, if the compression rate is set to 1/4, the amount of data will be 7.3 Mbps, which can meet the data transfer ratio of USB. On the other hand, if the size of a frame is 1/4 of the CIF QCIF ( Quarter Common Intermediate Format), it can meet the data transfer rate of USB without compression. Therefore, if compression is not required, the image information can be directly transmitted to the host device via USB, so that the host device does not need to perform decompression processing, thereby reducing data processing time and reducing the burden on the processor. For this reason, the surveillance camera itself must be able to select the compression ratio of the video information. In addition, if the USB standard is used, up to 1 2 7 peripheral devices (USB devices) can be connected to one host device via a socket.
就USB格式而言，係USB裝置連接於埠時，該USB 裝置所持有的各種構成資訊會從主機裝置中取出。並且， 主機裝置將會經常有計劃地選擇傳送方式及何時進行（以 1 s爲單位·)。此刻，由於1 s的最大資料傳送速度爲上 述之1 2&b p s ，因此爲了使複數個U-S B裝置能夠在 藉時間分隔多路傳輸方式來進行資料傳送時不會大幅度地 影響到實時性，其全體U S B裝置的資料傳送速率必須要 在1 2Mb p s以下。例如攝影裝置之類的資料傳送速率 較大U S B裝置最理想是能在考量其他U S B裝置數量或 —- 資料傳送速率之下來改變影像資訊的壓縮率。同樣的就此 點而言，監視用攝影機本身必須要能夠選擇影像資訊的壓 ^^1 u —^1 I - - - - I {对先r面之注意事項再硝巧本頁) 本紙張尺度述州中囷國家標率（CNS ) Α4規格（210X297公釐） -5- 416229 a? B7 五、發明説明) 縮率。 並且，本發明者係針對該情況的影像資料的壓縮手法 加以檢討。伊ί如，藉由電線來傳送動畫資訊時，通常是 使用Η . 2 6 1等之資訊解壓縮規格。此資訊壓縮手法先 是在壓縮側檢測出過去的影像資訊幀與現在的影像資訊幀 。在動畫中，由於幀與幀彼此間的關係與時間的連續性有 關，因此必須藉由差分的運算來消減其資訊量。其次，可 藉由離散餘弦轉換來將差分轉換成頻率。一般，若將影像 轉換成頻率的話，則資訊將會集中於低頻率成分》接著， 將頻率轉換後的資料予以量化，並消減資訊量較少的高頻 成分的資訊。最後，注視編碼的出現頻率|而來進可變長 度編碼處理，該編碼處理係使出現頻率高的編碼形成較短 的編碼長度，以及使出現頻率低的編碼形成較長的編碼長 度。又•在解壓縮側中，將依可變長度解碼化，反量化， 及反離散餘弦轉換等之順序來運算幀與幀之間的差分資料 。接著，將差分資料加W於過去的影像資訊幀中，然後再 顯現出影撼。這類的手法主要是著重於影像的時間、空間 的冗長度^削減其影像的資訊量。 但，就此類之影像資訊壓縮技術而言，由於是利用幀 與幀之間的關係來進資訊壓縮處理，因此必須積蓄複數幀 量的影像資訊，而使得必須準備多數個的幀記憶體，無形 中增加了硬體設備的成本。 __ 此外，幀與幀彼此間的關係與時間的連續性較無關時 ，或影像資訊的頻率成分集中於高頻時，資訊的壓縮率將 I I 丨Ϊ ! - -I -- In ί ^^1 ^—E. I - i n ^^1 ("-先閲讀r面之注意事項再填e本頁) 本紙張尺度適用中國囤家標率（CNS ) A4%格（210X297公釐） -6 - 416229 A7 B7 五、發明説明 言，由於是在編碼時進行資訊量的削 單位時間的幀數量）將有所變化，而 影像之被攝影物的動作不能保持平滑 自然。 體來進行解壓縮處理時，由於在逆離 數非常多•因此大幅度地增加了主機 钟- 先 閲 r ιέ 意 事 項 再 η 本 n 會降低β就此情況而 減，因此幀率（每一 導致解壓縮後'的再生 順暢的動作，亦即不 另外，在藉由軟 散餘弦轉換中的運算 裝置側的負擔。 本發明之目的是在於提供一種能夠配合影像大小（資 訊量）及傳送路徑的帶域（傳送容量）而有效率地傳達影 像資訊且保持良好的畫質之攝影裝置。 訂 本發明之另一目的是在於提供一種能夠減低上述配合 影像大小及傳送路徑的帶域而有效率地傳達影像資訊且保 持良好的畫質之攝影裝置的成本。 【發明之揭示】 本發行之攝影裝置保包含： 一攝手段：及 一壓縮手段，該壓縮手段係可在改變壓縮率的情況下壓 縮經由上述攝影手段所取得的影像資訊；及 一介面手段，該介面手段係利用於自上述壓縮手段所輸 出之壓縮影像資訊的資料傳送： 又，上述壓縮手段係包含：供以壓縮各各影像資_訊之 複數個壓縮邏輯手段，及供以選擇使用上述壓縮邏輯手段 的處理的壓縮率之手段：及指示上述選擇手段所選擇的壓 本紙張尺度述用中國囤家標隼（CNS ) A4規格（2丨0X297公* ) 怒浐部中呔^41·而h工消於合竹扣印31 416229 A7 B7 五、發明説明fc ) 縮率之手段。 藉此，由於可以利用複數個壓縮邏輯手段來選擇壓縮 率，®此能夠按照主機裝、置（供以接受不同影像大小’傳 送容量，編碼壓縮影像資訊）的解壓縮處理能力來使壓縮 率呈最佳化。 上述壓縮邏輯手段可於單一的影像資訊幀內完成壓縮 處理。換言之，能以影像資訊幀內的資料來完成壓縮處理 。因此，將可減低供以壓縮影像的硬體成本’且在進行壓 縮處理時不 '需要幀記憶體。 上述複數個的壓縮邏輯手段係採用影像資訊的間隔電 路及AYUV電路。此刻，選擇手段係可自僅使用上述間 隔電路的狀態，及僅使用上述△ γ TJ v電路的狀態’及使 用上述間嗝電路與ΔΥ u V電路雙方的狀態’以及不使用 上述間隔電路與ΛΥ U V電路而令影像資訊通過的狀態之 中選擇其中一個狀態。藉此，影像資訊將與空間或時間的 .冗長度無關，能以所選'_擇出的一定壓縮率來壓縮各各影像 資訊，亦β"卩可容易確保一定的幀率。如此一來，將可防止 經過壓縮=·解壓縮後的影像資訊的畫質產生劣化。 又•對於壓縮邏輯手段而言，應考量軟體對解壓縮的 處理情況，及壓縮率對計算的容易性方面。在壓縮處理中 ，係利用壓縮率爲1 /m的1 /m間隔方式，及壓縮率爲 1/n的1/n間隔方式，以及利用壓縮率爲Ι/m的 △ YUV方式，並組合這些方式而予以直列處理，藉此來 進行 1/m，1/n，l/(m· η) 1 l/(m· m) ---- ----1 -- - J^— I - I 1- 1^1 ^^1 1^1. {钵先閱讀背面之：1£意事項再填艿本頁) 本紙張尺度適用中國國家標準{ CNS ) A4現格（210X297公釐） -8 - A7 B7 416229 五、發明説明 的壓縮處理。如此一來，壓縮處理的計算將更爲容易’且 能減輕用以進行解壓縮的軟體之負擔β 計. 先 聞 讀 背- ιέ 之 注 意 事 項 再 η 本 頁 由於上述1 / m間隔與1 / h間隔等2種類間隔的主 要處理方式同爲過濾運算，因此硬體方面共通部份較多， 亦即不必兩方都要具備，換言之•增加電路的規模情況非 常少。又，過濾運算只要依次對輸入的影像資料進行積和 運算即可，又，ΛΥυν方式亦只要對輸入的影像資料的 差分進行編碼處理即可。在此，由於計算容易，因此可以 降低用以進行壓縮處理的硬體之製造成本，以及能夠減少 用以進行解壓縮之軟體的負擔。 訂 此外，上述壓縮手段並非只限於使用專門的硬體，亦 可利用軟體。 另外，上述介面手段係可採用具有以u S Β爲基準之 介面功能者。並且，與具有U S Β介面功能的U S Β裝置 連接之主機裝置的U S Β埠，係可共同擁有多數的U S Β 裝置。又，由於主機裝置之U S Β埠的最大資料傳送速率 爲1 2 b p's，因此複數個U S Β裝置在以時間分隔多路 傳輸方式莱進行資料傳送時必須要滿足此限制。此刻，由 於監視用攝影機可選擇影像資訊的壓縮率，因此監視用攝 影機爲資料傳送速率較大的U S B裝置時，可在考量其他 U S B裝置（共有U S B埠）的數量或資料傳送速率之下 來改變影像資訊的壓縮率。 給以上述壓縮率選擇的指示之指示手段，係根掾自上 述介面手段所供給的控制資訊來賦予上述指示。連接於介 本紙張尺度速用中®國家標準（CNS ) Α4規格（210X297公釐） -9- A7 B7 416229 五、發明説明 面手段的主機裝置給以該指示時，主機裝置係可參照此刻 之壓縮率的指示來進行解壓縮處理。 it 先 閲 讀 背― τέ 注 意 事 項 再 % 本 【供以實施發明之最佳形態】 訂 圖1係顯示具備監視用攝影機與主電腦之影像壓縮解 壓縮系統的全體構成圖。圖1中，4係表示個人電腦等之 主電腦，例如具有U S B介面功能之外部介面，亦即，在 USB埠可連接對應於USB的裝置（USB裝置），上 述U S B埠係配置於U S B主插座2 0。特別是在主電腦 4的內部，USB主插座2 0將被連接於介面控制器（圖 中未示），按照上述USB功能規格書（REV1.0) 之規定來進行資料傳送控制，該資料傳送控制係根據來自 處理器（圖中未示）的資料傳送指令而指示者。 雖無特別加以限定，但在圖1中是以監視用攝影機 2 1作爲USB裝置的其中之一。監視用攝影機21係以 介面電纜10A來連接於USB主插座20 »又，USB 主插座2 (Γ將經由介面電纜1 Ο B及外部插座2 2來與另 外的 U S B 裝置連接，例如 D S U (Digital Service Unit )及 T A ( Terminal Adapter) 2 3 及鍵盤 2 4。 上述監視用攝影機2 1係具有CCD ( Charge Coupled Device,攝影元件）1，A/D轉換器2 (類比/數位轉換 器）及影像處理部3。雖無特別加以限定，但在此之影像 處理部3爲1個半導體積體電路。藉由C CD 1而攝·取到 的影像訊號將以 R (RED) ，G (GREEN) ，B (BLUE) 本紙張尺度適用中囡國家標準（CNS } Α4規格（210Χ297公釐） •10- 416229 A7 B7 五、發明説明fe ) 等訊號’經由A/D轉換器2來輸入影像處理部3。然後 ’在訊號處理部5中將所輸入的影像訊號予以轉換成亮度 訊號與色差訊’號。接著 '在可變壓縮部6中對亮度訊號與 色差訊號進行資訊壓縮處理（可改變壓縮率）。之後，所 被壓縮的資料（壓縮影像資訊）將從U S B介面電路7經 由介面電纜1 0A來傳送至主電腦4。並且，在主電腦4 中將藉由軟體來對壓縮影像訊號進行解壓縮處理，然後再 予以顯示於監視器上。訊號處理部5及可變壓縮部6亦可 分別藉由微電腦及軟體來進行處理。 又’時間控制部8係供以進行C CD 1 ，A/D轉換 器2，訊號處理部5及可變壓縮部6等之動作時間的控制 。此外，可變壓縮部6的壓縮率選擇，以及隨著影像大小 的變更而對訊號處理部5及時間控制部8所執行的設定變 更’係由主電腦4經由全體控制部9來任意地進行。具體 而言，在影像處理部3中必須變更設定時|主電腦4將經 由傳送路徑1 Ο A來發送指令，並根據附隨於該指令中的 控制資訊乘切換全體控制部9的設定。雖無特別加以限定 ，但在此乏控制資訊將被收容於全體控制部9的控制暫存 器2 5中，並利用該控制資訊來選擇可變壓縮部6的壓縮 率。 上述C CD 1及上述A/D轉換器2係與在時間控制 部8所產生的訊號同步動作。並且，來自C CD 1的_影像 資訊，將於每一條掃瞄線上依次地讀出每一個像素，、然後 再賦予訊號處理部5。此外，監視用攝影機2 1不需要具 {誚先閲讀Ϊ-面之注意事頜再硪{?5本頁) I 、衣. 訂 本紙張尺度適州中國國家標率（CNS ) A4iJt格（210X297公釐） -11 - 416229 A7 B7 五、發明説明fe ) 備有對應於cIF等之影像資訊的幀記憶體。 圖2係顯示上述可變壓縮部6的詳細電路圖。上述可 變壓縮部係崑有：將取得影像的資訊量予以壓縮成1 /2 之1 / 2間隔電路1 1，及將取得影像的資訊量予以壓縮 成1/4之1/4間隔電路1 2，及將取得影像的資訊量 予以壓縮成1/2之ΔΥυν電路13，及選擇3種類的 壓縮電路之開關電路14，15。開關電路14及15將 根據全體控制部（電路）9的指示來控制開關狀態。並且 藉由此開關電路1 4，1 5的切換來設定路徑，該路徑係 包含：輸出所被輸入的訊號（不進行壓縮）之路徑，以及 進行壓縮率爲1/2，1/4，1/8的壓縮之路徑。 以下，將針對上述1 / 2間隔電路1 1加以說明》圖 3係顯示配置成二維的亮度（或色差）訊號之模式圖。 1 / 2間隔電路係將1 / 2的資料予以樣本化，並藉由取 1/2資料的間隔來把上述的資料量壓縮成1/2 «但只 是單純地取1 / 2資料的間隔是不夠的，因爲會受到區域 性的影響，__而導致影像失真^ 因此i進行間隔處理之前，對影像實施二維的L P F (Low Pass Filter)運算’而來減低高頻成分。圖4係表 示L P F的構成例。該構成例係屬水平方向的記億元件 16爲7抽頭（tap) ’垂直方向的記憶元件17爲3抽頭 之F I R (Finite Impulse Response)型的濾光器。在水平 方向上每一個像素各輸入亮度（或色差）訊號，接著進行 使用係數1 8 A〜1 8 J的積和運算，然後在中心像素的 本紙張尺岌述用中國國家標率（〇奶）八4規格（2丨0父297公着） 先 閱 背· 之 意 事 項 再 本 頁 策 訂 -12- 416229 Α7 Β7 五'發明説明（10 ) 資料中置換該運算結果。選擇電路1 9將進行第3圖之間 隔處理，而來將資料量壓縮成1/2。 以下，蔣'針對上述1 4間隔電路1 2加以說明。如 圖5所示一般，1/4間隔電路係將1/4的資料予以樣 本化，並藉由取3/4資料的間隔來把上述的資料量壓縮 成1/4。在此，同樣的會在間隔處理之前進行；L P F運 算。雖然濾光器的構成完全與圖4相同，但係數1 8A〜 18 J的値有所不同。由於1/2間隔電路1 1與1/4 間隔電路12不會同時動作，因此只要準備2種係數 18A〜18 J ，而其他的電路部分係與1/2間隔電路 1 1及1 / 4間隔電路1 2共用。 以下，將針對上述△Y U V電路1 3加以說明。 △ Y U V方式爲實際運用於汽車導航裝置等之壓縮技術》 圖6係表示將原來的資料轉換成壓縮資料之轉換例。藉由 轉換式Y=(y/255)· 219+16來把亮度（或 色差）訊號的動態區域Ό〜2 5 5壓縮成1 6〜2 3 5。 並求取Υ η" _預測値Ρ η =差分D η。接著根據圖7所示 之轉換表灰對差分D η進行編碼處理，並將取得的ΔΥ η 傳送出。然後再根據圖8所示之轉換表再度對ΛΥ η進行 轉換而取得D η，接著把該D · η値加上預測値Ρ η而形 成下次的預測値Pn + 1 (Pn + l = Pn+D’n) » pn + l爲1 6以下或23 5以上時，予以制限成16或 2 3 5。同樣的，AYUV電路1 3亦將資料量壓縮成 1 / 2 。 本紙乐尺度適用中围國家標準（CNS ) A4規格（210X297公釐） ("·先Μ讀r面之注意事項再峨寫本頁)As far as the USB format is concerned, when a USB device is connected to a port, various configuration information held by the USB device is taken out from the host device. In addition, the host device will often choose a transmission method and when to perform it (in units of 1 s). At this moment, since the maximum data transmission speed of 1 s is the above 12 & bps, in order to enable multiple US B devices to transmit data by time-separated multiplexing, the real-time performance will not be greatly affected. The data transfer rate of the entire USB device must be below 12 Mb ps. For example, the data transmission rate of a photographic device is larger. The ideal size of a USB device is to change the compression rate of the image information by considering the number of other USB devices or the data transmission rate. At this point, the surveillance camera itself must be able to select the image information. ^^ 1 u — ^ 1 I----I State Central China National Standards (CNS) A4 specifications (210X297 mm) -5- 416229 a? B7 V. Description of the invention). The present inventors reviewed the compression method of the video data in this case. Yiluru, when transmitting animation information over a wire, usually uses information such as Η. 2 6 1 to decompress the specifications. This information compression method first detects past image information frames and current image information frames on the compression side. In animation, because the relationship between frames and frames is related to the continuity of time, the amount of information must be reduced by the operation of difference. Second, the difference can be converted to frequency by discrete cosine transform. Generally, if the image is converted into frequency, the information will be concentrated on the low-frequency component. ”Then, the data after frequency conversion is quantified, and the information of high-frequency component with less information is reduced. Finally, attention is paid to the frequency of occurrence of the code | to enter the variable-length encoding process, which makes the code with higher frequency to form a shorter code length and the code with lower frequency to form a longer code length. Also, in the decompression side, the difference data between frames is calculated in the order of variable length decoding, inverse quantization, and inverse discrete cosine transform. Then, the difference data is added to the past image information frames, and then the shadow is displayed. This type of method mainly focuses on the time and space of the image and reduces the amount of information in the image. However, as for this type of image information compression technology, since the relationship between frames is used for information compression processing, it is necessary to accumulate a plurality of frames of image information, making it necessary to prepare a large number of frame memories, which is intangible This increases the cost of hardware equipment. __ In addition, when the relationship between frames and frames is less relevant to the continuity of time, or when the frequency components of image information are concentrated at high frequencies, the compression ratio of the information will be II 丨 Ϊ!--I-In ί ^^ 1 ^ —E. I-in ^^ 1 (" -Read the precautions on the r side and then fill in the e page) This paper size is applicable to the Chinese household standard rate (CNS) A4% grid (210X297 mm) -6- 416229 A7 B7 V. Explanation of the invention, since the number of frames per unit time is reduced during the encoding process when the amount of information is encoded, the movement of the object in the image cannot be kept smooth and natural. When performing the decompression process, the number of inverse deviations is very large. Therefore, the host clock is greatly increased-read the precautions first, and then n n will decrease β. In this case, the frame rate (each result After decompression, the reproduction is smooth, that is, without burden on the computing device side through soft cosine transformation. The object of the present invention is to provide an image size (information amount) and transmission path that can match Band (transmission capacity) is a photographing device that efficiently conveys image information and maintains good image quality. Another object of the present invention is to provide a band region capable of reducing the above-mentioned matching image size and transmission path and efficiently. The cost of a photographic device that conveys image information and maintains good image quality. [Disclosure of the Invention] The photographic device of this release includes: a photographing means: and a compression means, which can be compressed under the condition of changing the compression rate. Image information obtained through the above-mentioned photographing means; and an interface means which is used from the above-mentioned compression means The data transmission of the compressed image information is as follows: In addition, the above-mentioned compression means include: a plurality of compression logic means for compressing each image data information, and a means for selecting a compression rate for processing using the compression logic means: And indicate the size of the pressed paper selected by the above-mentioned selection methods. It is described in Chinese storehouse standard (CNS) A4 size (2 丨 0X297 male *). The middle part of the rage part ^ 41 A7 B7 V. Invention Description fc) Means of shrinkage. As a result, since multiple compression logic methods can be used to select the compression ratio, the compression ratio can be displayed according to the decompression processing capability of the host device and device (for accepting different image sizes' transmission capacity and encoding compressed image information) optimization. The above compression logic means can complete the compression processing in a single image information frame. In other words, the compression processing can be completed with the data in the image information frame. Therefore, the hardware cost for supplying compressed images will be reduced 'and frame memory will not be required when performing compression processing. The plurality of compression logic methods mentioned above use the interval circuit and AYUV circuit of image information. At this moment, the selection means can be a state using only the above-mentioned spacer circuit, and a state using only the above-mentioned Δ γ TJ v circuit, and a state using both the above-mentioned interval circuit and ΔΥ u V circuit, and no using the above-mentioned interval circuit and ΛΥ Select one of the states in which the UV circuit passes the image information. In this way, the image information will have nothing to do with the redundancy of space or time. Each image information can be compressed with a certain compression rate selected by __, and β " 卩 can easily ensure a certain frame rate. In this way, it is possible to prevent deterioration of the image quality of the image information after compression = · decompression. Also, for the compression logic means, the software's handling of decompression and the ease of calculation of the compression rate should be considered. In the compression process, a 1 / m interval method with a compression ratio of 1 / m, a 1 / n interval method with a compression ratio of 1 / n, and a ΔYUV method with a compression ratio of 1 / m are used in combination. To perform in-line processing to perform 1 / m, 1 / n, l / (m · η) 1 l / (m · m) ---- ---- 1--J ^ — I- I 1- 1 ^ 1 ^^ 1 1 ^ 1. {Read the back of the bowl first: 11Notes before filling in this page) This paper size applies the Chinese national standard {CNS) A4 (210X297 mm) -8 -A7 B7 416229 V. Compression processing as described in the invention. In this way, the calculation of the compression process will be easier 'and it will reduce the burden of the software used to perform the decompression β meter. First read the back-ιNotes and then η This page due to the above 1 / m interval and 1 / The main processing methods for two types of intervals, such as h intervals, are also filtering operations, so there are many common parts in hardware, that is, they do not need to be provided by both parties. In other words, it is very rare to increase the scale of the circuit. In addition, the filtering operation only needs to perform a product-sum operation on the input image data in order, and the ΛΥυν method only needs to encode the difference of the input image data. Here, since the calculation is easy, the manufacturing cost of the hardware for compression processing can be reduced, and the burden on the software for decompression can be reduced. In addition, the above compression methods are not limited to the use of specialized hardware, but also software. In addition, the aforementioned interface means may be one having an interface function based on u S Β. In addition, the USB port of the host device connected to the USB device having the USB interface function can share a majority of USB devices. In addition, since the maximum data transfer rate of the USB port of the host device is 1 2 b p's, a plurality of USB devices must meet this limitation when performing data transmission in a time-separated multiplex transmission mode. At this moment, since the surveillance camera can select the compression ratio of the image information, when the surveillance camera is a USB device with a large data transfer rate, the image can be changed by considering the number of other USB devices (shared USB port) or the data transfer rate. The compression ratio of the information. The instruction means for the instruction selected by the compression ratio is based on the control information supplied from the interface means to give the instruction. Connected to the medium-speed standard of the paper ® National Standard (CNS) A4 specification (210X297 mm) -9- A7 B7 416229 5. When the host device invented the means to explain the instructions, the host device can refer to the moment The compression ratio is instructed to perform decompression processing. Read it first-τ 注 Note the items and then% [The best form for implementing the invention] Order Figure 1 shows the overall configuration of an image compression and decompression system with a surveillance camera and a host computer. In FIG. 1, 4 indicates a host computer such as a personal computer, for example, an external interface with a USB interface function, that is, a device corresponding to USB (USB device) can be connected to the USB port, and the USB port is configured in a USB main socket. 2 0. Especially inside the host computer 4, the USB host socket 20 will be connected to the interface controller (not shown), and the data transfer control will be performed according to the above-mentioned USB function specification (REV1.0). The data transfer The control is instructed according to a data transfer instruction from a processor (not shown). Although not particularly limited, in FIG. 1, a surveillance camera 21 is used as one of the USB devices. The surveillance camera 21 is connected to the USB host socket 20 with an interface cable 10A. Furthermore, the USB host socket 2 (Γ will be connected to another USB device via the interface cable 10B and the external socket 22, such as DSU (Digital Service Unit) and TA (Terminal Adapter) 2 3 and keyboard 2 4. The above-mentioned surveillance camera 2 1 has a CCD (Charge Coupled Device) 1, A / D converter 2 (analog / digital converter), and image processing. Section 3. Although not particularly limited, the image processing section 3 here is a semiconductor integrated circuit. The image signal captured and acquired by C CD 1 will be R (RED), G (GREEN), B (BLUE) This paper standard applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) • 10-416229 A7 B7 V. Description of the invention) and other signals' input to the image processing unit 3 via the A / D converter 2 . Then 'convert the input image signal into a luminance signal and color difference signal' in the signal processing section 5. Then 'in the variable compression section 6, perform information compression processing on the luminance signal and color difference signal (the compression rate can be changed) ). After that, it is compressed The data (compressed image information) will be transmitted from the USB interface circuit 7 to the host computer 4 through the interface cable 10A. In addition, the host computer 4 will decompress the compressed image signal by software and then display it On the monitor. The signal processing section 5 and the variable compression section 6 can also be processed by microcomputer and software respectively. The 'time control section 8 is used to perform C CD 1, A / D converter 2, and signal processing. Control of the operation time of the unit 5 and the variable compression unit 6. In addition, the compression ratio of the variable compression unit 6 is selected, and the settings performed by the signal processing unit 5 and the time control unit 8 are changed as the image size changes. 'It is arbitrarily performed by the host computer 4 via the entire control unit 9. Specifically, when the setting must be changed in the image processing unit 3 | The host computer 4 will send a command via the transmission path 1 0 A, and it will be accompanied by The control information in this command is used to switch the settings of the overall control unit 9. Although there is no particular limitation, the lack of control information will be stored in the control register 25 of the overall control unit 9 and the control information will be used to Select the compression ratio of the variable compression section 6. The above-mentioned C CD 1 and the above-mentioned A / D converter 2 operate synchronously with the signal generated by the time control section 8. In addition, the _image information from C CD 1 Each pixel is sequentially read out on one scan line, and then given to the signal processing unit 5. In addition, the surveillance camera 21 does not need to have {诮 read the Ϊ-face of attention first jaw then 硪 {? 5 pages) I. Clothes. The paper size of the book is China State Standards (CNS) A4iJt (210X297 mm) -11-416229 A7 B7 5. The description of the invention fe) Frame memory corresponding to image information such as cIF. FIG. 2 is a detailed circuit diagram showing the variable compression section 6 described above. The above-mentioned variable compression unit includes: compressing the information amount of the acquired image into a 1/2 interval circuit 1 1/2, and compressing the information amount of the acquired image into 1/4 interval circuit 1 1 2, and the ΔΥυν circuit 13 which compresses the information amount of the obtained image to 1/2, and the switch circuits 14, 15 which select three types of compression circuits. The switching circuits 14 and 15 will control the switching state according to the instructions of the overall control section (circuit) 9. And the path is set by the switching of the switching circuits 14 and 15. The path includes: a path for outputting the input signal (without compression), and a compression ratio of 1/2, 1/4, 1 / 8 compression path. Hereinafter, the above-mentioned 1/2 interval circuit 11 will be described. FIG. 3 is a schematic diagram showing a two-dimensional brightness (or color difference) signal. The 1/2 interval circuit is to sample 1/2 data, and to compress the above data amount to 1/2 by taking 1/2 data intervals. «But just to take 1/2 data intervals is Insufficient, because it will be affected by regional influences, __ will cause image distortion ^ Therefore, before i perform interval processing, two-dimensional LPF (Low Pass Filter) operation is performed on the image to reduce high-frequency components. Fig. 4 shows a configuration example of the L P F. This configuration example is a FIR (Finite Impulse Response) type filter having a horizontal taper element 16 as a 7-tap and a vertical memory element 17 as a 3-tap. Input the brightness (or color difference) signal for each pixel in the horizontal direction, and then perform the product and sum operation using the coefficients of 1 8 A to 1 8 J, and then use the Chinese national standard (0 milk ) 8 4 specifications (2 丨 0 parent 297 public works) Read the meaning of the matter first and then make a decision on this page -12-416229 Α7 Β7 Five 'invention description (10) The results of this calculation are replaced. The selection circuit 19 will perform the interval processing in Fig. 3 to compress the data volume to 1/2. In the following, Jiang 'will explain the above-mentioned 14-interval circuit 12. As shown in Fig. 5, a 1/4 interval circuit samples a 1/4 data and compresses the above-mentioned data amount to 1/4 by taking an interval of 3/4 data. Here, the same will be done before the interval processing; L P F calculation. Although the configuration of the filter is completely the same as that of FIG. 4, the 値 of the coefficients 18 A to 18 J is different. Since 1/2 interval circuit 1 and 1/4 interval circuit 12 do not operate at the same time, as long as two types of coefficients 18A ~ 18 J are prepared, the other circuit parts are spaced from 1/2 interval circuit 1 1 and 1/4. Circuits 1 and 2 are shared. Hereinafter, the above-mentioned ΔY U V circuit 13 will be described. △ Y U V method is a compression technology that is actually applied to car navigation devices and so on. "Figure 6 shows an example of conversion from original data to compressed data. The conversion range Y = (y / 255) · 219 + 16 is used to compress the dynamic range 亮度 ~ 2 5 5 of the luminance (or color difference) signal to 16 ~ 2 3 5. And find Υ η " _prediction 値 Ρ η = difference D η. Then, the difference D η is encoded according to the conversion table gray shown in FIG. 7, and the obtained ΔΥ η is transmitted. Then, according to the conversion table shown in FIG. 8, ΔΥ η is converted again to obtain D η, and then D · η 値 is added to the prediction 値 η to form the next prediction 値 Pn + 1 (Pn + l = Pn + D'n) »pn + l is limited to 16 or 2 3 5 when it is 16 or less or 23 5 or more. Similarly, the AYUV circuit 13 also compresses the amount of data to 1/2. The paper scale is applicable to the China National Standard (CNS) A4 specification (210X297 mm) (" · Notes for reading on the r side before writing this page)
-13- 416229 五、發明説明（η )-13- 416229 V. Description of the invention (η)
......hr— - I - - I ^^1 ^^1 I --- E 先M讀^-面之ii意亨項再硪巧本頁J 其次，在受訊側這一方會根據圖8所示之轉換表來把 △ Yn解碼成D η ’並在之前的復原資料γ. η — 1中加 上D:_n，而敢得區域壓縮資料Υ_ η »又，藉由轉換式 y = ( Υ · - 1 6 ) * 255/219來擴大動態區域， 而取得復原資料y ‘ η。 如以上所述，可變壓縮部6的處理將可在影像資訊幀 內完成，並且在解壓縮處理中不需要幀記憶體，而得以降 低該影像解壓縮裝置的成本。甚至，處理數不會因影像資 訊的冗長而有所變化，且保持一定的幀率，進而使再生影 像的被攝影物保持平滑順暢的動作。 以下，將根據圖1 0的流程圖來說明藉由軟體來處理 上述訊號處理部5及可變壓縮部6的功能之情形。 首先，將數位化的R，G，Β等的影像訊號（自 A/D轉換器2輸入）轉換成亮度訊號與色差訊號（S 9 )。其次，若需要進行壓縮處理時（根據主電腦所指示的 壓縮率）（S10)，則將先判斷是否要進行間隔壓縮處 理（s 1 Γ)。若要進行間隔壓縮處理，則將再一步判斷 是要進行"Ϊ/2間隔或1/4間隔處理（S 1 2 )，然後 執行1 / 2間隔處理（S 1 3 )或1 / 4間隔處理（ S14)。此外，若需要進行ΔΥυν壓縮處理時（ s 1 δ )，則於步驟S16進行ΔΥυν壓縮處理。若任 何壓縮處理都不需要的話，則直接輸出輝度（色差）。 例如，壓縮率爲1 / 4時，有利用間隔1 / 4之方法 ’及利用間隔1 / 2且△ Y U V之方法。此外，若是利用 本紙張尺度適中國國家標準（CNS > A4規格（2丨0X297公釐） 14 - 416229 "7 B7 五、發明説明<12 ) 畫質及解壓縮軟體的處理能力時，則任何方法皆可選擇" <"先閲讀賞面之注意事項再站巧本頁) 又，若不實施ΔΥυν壓縮處理，而僅進行1/4間 隔處理時，則只要從介面電纜1 Ο Α直接將被壓縮的影像 資訊供應給顯示手段（主電腦4之監視器等），即使不使 用ΔΥΙΐν的解碼手段，依然可以達成縮小尺寸的影像顯 示。 主電腦4係經由介面電績1 Ο Α來將控制資訊供應給 可變壓縮部6而指示壓縮率。並且*主電腦4會將該控制 資訊予以記憶起來，之後在對壓縮資料進行解壓縮時，參 照所記憶的控制資訊來進行圖9之流程的處理。 首先，主電腦4將參照上述控制資訊來判斷是否要進 行ΔΥυν壓縮處理（S1)，若要進行ΔΥυν壓縮處 理，則將於下個步驟（S 2 )進行AYUV解壓縮處理。 其次，主電腦4將參照上述控制資訊來判斷是否要進行間 隔壓縮處理（S3)，若要進行間隔壓縮處理，則將於下 個步驟（S 4 )判斷是要進行1 / 2間隔或1 / 4間隔處 理。若是宴進行1/2間隔處理，則將於下個步驟（S5 )藉由2 f音內插處理來進行供以彌補被間隔化的資料之過 濾運算。若是要進行1/4間隔處理，則將於下個步驟（ S 6 )判斷是否要進行解壓縮處理。在此，主電腦4的顯 示畫面大小若爲壓縮前之影像大小的1 / 4時，則將省去 解壓縮處理。若需要進行解壓縮處理時，則將藉由4倍內 插處理來進行供以彌補被間隔化的資料之過濾運算。__接著 在完成解壓縮處理之後顯示其影像（S8)。 本紙張尺度通用中國圉家標準（CNS ) A4規格（2丨0X297公釐} -15- 416229 A7 B7 五、發明説明b ) 由於影像資訊的壓縮方式爲可變壓縮率I因此具有相 對關係的壓縮率舆畫質之間無論是以那一方爲優先皆可對 應。又，由;能以即定的壓縮率來壓縮各幀，且各各壓縮 計算法的運算量少，甚至不需要多數的幀記憶體，因此而 能夠實現低成本的系統。 主電腦4的U S B埠將共同具有多數的u S B裝置。 並且，因爲主電腦4之U S B埠的最大資料傳送速率爲 1 2bp s，所以複數個USB裝置係以時間分隔多路傳 輸方式來進行資料傳送時必須要滿足此限制。此刻，由於 監視用攝影機2 1可選擇影像資訊的壓縮率，因此監視用 攝影機2 1爲資料傳送速率較大的U S B裝置時，可在考 量其他U S B裝置數量或資訊的壓縮率之下來改變影像資 訊的壓縮率。例如，C C D 1之攝影幀率爲2 5 Η z，影 像資料格式爲4 : 2 : 0，及影像大小爲C I F的情況時 ’當連接於U S Β主插座2 0的U S Β裝置數量較少時， 可將壓縮率設定成1/_4，若其他USB裝置的數量較多 時，則可蔣壓縮率設定成1/8 » 又，CCD1之攝影幀率爲25Hz ，影像資料格式 爲4 : 2 : 0，及影像大小爲Q C I F的情況時，令資料 通過可變壓縮部6 (壓縮率爲0)，當其他USB裝置的 數量較多時，則可將壓縮率設定成1/2或1/4。 又，主電腦亦可參照自各U S B裝置所取得的構成資 訊來進行壓縮率的設定控制。 如此一來，由於具有U S B介面功能的監視用攝影機 本紙張尺度適用中囷國家標率{CNS ) A4纟兄格（210X297公釐） (邻先閲讀背面之注意事項再蛾艿本頁) -丁 -16 - 416229 A7 _____B7_ 五、發明説明Q ) 2 1的資料傳送量較大，因此可在考量共有U S B埠之其 他U S B裝置的數量或資料傳送速率之下來改變影像資訊 的壓縮率。' 閲 讀 背- ιέ 事 項 再 η 本 頁 以上係根據實施例來具體說明本發明，但本發明並非 僅限於此，只要不脫離本發明之主旨範圍，亦可進行種種 的變更。 例如，介面手段並非只限於U S B，亦可爲其他的串 列介面或並列介面等。並且，亮度訊號及色差訊號的影像 資料格式亦可爲4: 2: 2。而且，藉由攝影手段所攝取 之影像資訊的影像幀率並非只被限定於2 5Hz，亦可爲 訂 3 Ο Η z。此外，藉由攝影手段所攝取之影像資訊的影像 大小並非只被限定於C I F或QC I F。另外，在上述實 施例中，雖是藉由主電腦4來設定全體控制部9 ·但對於 不需要自外部變更設定的項目而言，亦可預先予以固定。 【產業上之利用可能性1 本發明係可廣泛適用於連接在個人電腦之監視用攝影 機，視訊％議系統，視訊電話等。 【圖面之簡單的說明】 第1圖係顯示本發明之一實施例之具備監視用攝影機 與主電腦之影像壓縮解壓縮系統的全體構成方塊圖。 第2圖係顯示可變壓縮部之一例的方塊圖。 .. 第3圖係顯示用以說明藉可變壓縮部而選擇之1 / 2 本紙張尺度述用中國固家標準（CNS )六4規格（210X297公釐） -17- 好"部中戎^h 3消於合竹^印欠 416229 A7 B7 五、發明説明（|5 ) 間隔動作的模式圖。 第4圖係顯示設置於可變壓縮部的間隔電路之一例的 電路圖。 第5圖係顯示用以說明藉可變壓縮部而選擇之1 / 4 間隔動作的模式圖。 第6圖係顯示ΔΥυν電路的壓縮·解壓縮處理之具 體資料轉換例的說明圖。 第7圖係顯示在ΔΥυν電路中將鄰接影像間的差分 資料轉換成發訊資料之轉換表的說明圖。 第8圖係顯示在ΔΥυν電路中將收訊資料轉換成鄰 接影像間的差分資料之轉換表的說明圖。 第9圖係顯示主電腦所進行之壓縮資料的解壓縮處理 之一例的流程圖。 第1 0圖係顯示藉由軟體來實現影像資料的壓縮處理 之一例的流程圖。 【圖號之設明】...... hr—-I--I ^^ 1 ^^ 1 I --- E First read ^-face ii meaning heng item and then cope with this page J Second, the party on the receiving side will Decode △ Yn into D η ′ according to the conversion table shown in FIG. 8 and add D: _n to the previously restored data γ. Η-1 to obtain regional compression data Υ_ η »Also, by the conversion formula y = (Υ ·-1 6) * 255/219 to expand the dynamic region and obtain the restoration data y 'η. As described above, the processing of the variable compression unit 6 can be completed in the image information frame, and no frame memory is required in the decompression process, thereby reducing the cost of the image decompression device. In addition, the number of processes does not change due to the length of the image information, and a certain frame rate is maintained, so that the subject of the reproduced image maintains smooth and smooth motion. Hereinafter, the case where the functions of the signal processing section 5 and the variable compression section 6 are processed by software will be described with reference to the flowchart of FIG. 10. First, the digitalized R, G, and B image signals (input from the A / D converter 2) are converted into a luminance signal and a color difference signal (S 9). Secondly, if it is necessary to perform compression processing (according to the compression rate indicated by the host computer) (S10), it will first determine whether to perform the interval compression processing (s 1 Γ). If interval compression processing is to be performed, it will be further judged whether to perform "Ϊ / 2 interval or 1/4 interval processing (S 1 2), and then execute 1/2 interval processing (S 1 3) or 1/4 interval Processing (S14). In addition, if it is necessary to perform Δ 需要 υν compression processing (s 1 δ), ΔΥυν compression processing is performed in step S16. If no compression processing is required, the luminance (color difference) is directly output. For example, when the compression ratio is 1/4, there are a method using an interval of 1/4 'and a method using an interval of 1/2 and ΔY U V. In addition, if the paper size is in accordance with the Chinese national standard (CNS > A4 specification (2 丨 0X297 mm) 14-416229 " 7 B7 V. Description of the invention < 12) Image quality and processing power of the decompression software, Any method can be selected " < " Please read the note of appreciation before standing on this page) Also, if ΔΥυν compression processing is not implemented, and only 1/4 interval processing is performed, only the interface cable 1 〇 Α directly supplies the compressed image information to the display means (monitor of the host computer 4, etc.). Even without using ΔΥΙΐν decoding means, it can still achieve a reduced size image display. The host computer 4 supplies control information to the variable compression unit 6 via the interface performance 10A to indicate the compression ratio. And * the host computer 4 will memorize the control information, and then when decompressing the compressed data, refer to the stored control information to perform the processing of the flow of FIG. 9. First, the host computer 4 will refer to the above control information to determine whether to perform ΔΥυν compression processing (S1). If ΔΥυν compression processing is to be performed, AYUV decompression processing will be performed in the next step (S2). Secondly, the host computer 4 will refer to the above control information to determine whether interval compression processing is to be performed (S3). If interval compression processing is to be performed, it will be determined in the next step (S4) whether 1/2 interval or 1 / 4 interval processing. If it is to perform 1/2 interval processing, the next step (S5) will be performed by 2 f tone interpolation processing to provide a filtering operation to compensate for the spaced data. If the 1/4 interval processing is to be performed, it will be determined in the next step (S6) whether to perform the decompression processing. If the display screen size of the host computer 4 is 1/4 of the image size before compression, the decompression process will be omitted. If a decompression process is required, a 4x interpolation process will be used to perform a filtering operation to compensate for the spaced data. __ Next, the image is displayed after the decompression process is completed (S8). This paper standard is in accordance with Chinese Standard (CNS) A4 specification (2 丨 0X297mm) -15-416229 A7 B7 V. Description of the invention b) Since the compression method of the image information is a variable compression ratio I, it has a relative compression It is possible to correspond to the quality of Bingyu regardless of which one is given priority. In addition, each frame can be compressed at a predetermined compression rate, and each compression calculation method has a small amount of calculation, and does not even require a large amount of frame memory. Therefore, a low-cost system can be realized. The USB port of the host computer 4 will have a majority of USB devices in common. In addition, because the maximum data transfer rate of the USB port of the host computer 4 is 12 bps, multiple USB devices must meet this limitation when performing data transfer by time-separated multiplexing. At this moment, since the monitoring camera 21 can select the compression ratio of the image information, when the monitoring camera 21 is a USB device with a large data transfer rate, the image information can be changed by considering the number of other USB devices or the compression ratio of the information. Compression ratio. For example, when the camera frame rate of CCD 1 is 2 5 Η z, the image data format is 4: 2: 0, and the image size is CIF 'when the number of US Β devices connected to the US Β main socket 20 is small You can set the compression ratio to 1 / _4. If there are a lot of other USB devices, you can set the compression ratio to 1/8 »Also, the camera frame rate of CCD1 is 25Hz and the image data format is 4: 2: When the image size is 0 and the image size is QCIF, the data is passed through the variable compression section 6 (the compression ratio is 0). When the number of other USB devices is large, the compression ratio can be set to 1/2 or 1/4 . In addition, the host computer can also refer to the configuration information obtained from each USB device to control the setting of the compression ratio. In this way, because the surveillance camera with the USB interface function is suitable for the paper standard of China, the national standard {CNS) A4 纟 (210X297 mm) (Read the precautions on the back first, and then the page)-Ding -16-416229 A7 _____B7_ V. Description of the invention Q) 2 1 The data transfer volume is large, so you can change the compression ratio of the image information by considering the number or data transfer rate of other USB devices that share the USB port. 'Read memorize the matter again η This page has described the present invention in detail based on examples, but the present invention is not limited to this, and various changes can be made without departing from the scope of the gist of the present invention. For example, the interface means is not limited to USB, but may be other serial interfaces or parallel interfaces. In addition, the image data format of the brightness signal and color difference signal can also be 4: 2: 2. In addition, the image frame rate of the image information captured by the photographic means is not limited to only 25 Hz, but can also be set to 3 Η z. In addition, the image size of image information captured by photographic means is not limited to C I F or Q C I F. In addition, in the above-mentioned embodiment, although the overall control unit 9 is set by the host computer 4, the items that do not need to be changed from the outside may be fixed in advance. [Industrial Applicability 1 The present invention is widely applicable to surveillance cameras, videoconferencing systems, videophones, etc. connected to personal computers. [Brief description of the drawing] Fig. 1 is a block diagram showing the overall configuration of an image compression and decompression system including a surveillance camera and a host computer according to an embodiment of the present invention. Fig. 2 is a block diagram showing an example of a variable compression section. .. Figure 3 shows the 1/2 size of the paper chosen to illustrate the choice of the variable compression section using the Chinese Solid Standard (CNS) Six-four Specification (210X297 mm) -17- Good " Ministry Zhongrong ^ h 3 disappears in harmony ^ India 416229 A7 B7 V. Description of the invention (| 5) The pattern of interval action. Fig. 4 is a circuit diagram showing an example of a spacer circuit provided in the variable compression section. Fig. 5 is a schematic diagram showing the 1/4 interval operation selected by the variable compression section. Fig. 6 is an explanatory diagram showing a specific data conversion example of the compression and decompression processing of the ΔΥυν circuit. FIG. 7 is an explanatory diagram showing a conversion table for converting differential data between adjacent images into transmission data in a ΔΥυν circuit. FIG. 8 is an explanatory diagram showing a conversion table for converting received data into differential data between adjacent images in a ΔΥυν circuit. Fig. 9 is a flowchart showing an example of decompression processing of compressed data performed by the host computer. Fig. 10 is a flowchart showing an example of compression processing of image data by software. [Designation of drawing number]
1 · · : · C C D 2 .....A/D轉換器 3 .....影像處理部 4 .....主電腦 5 .....訊號處理部 6 .....可變壓縮部 7.....U S Β介面電路 本纸張X度適用中國國家標準（CNS) A4規格（2】ΟΧ297公釐） {"·先閱讀背面之注意事項再功艿本頁) 丨'" 訂 18 · 416229 A7 B7 五、發明説明丨6 ) 8 · · · ••時間控制部 9 · * ••全體控制部 1 0 A · ••介面電纜 _ l 0 B •介面電纜 11·· 12·· • 1 / 2間隔電路 • 1 / 4間隔電路 13·· • · △ Y U V電路 14，] .5 開關電路 16，] .7 _'記憶元件 19 —— •選擇電路 2 0·. • . U S B主插座 2 1·· •監視用攝影機 2 2·· ••外部插座 2 4.. ..鍵盤 2 5·· ••控制暫存器 本紙張尺度適扣中國國家標準（CNS ) A4規格（210X297公釐） -19-1 · ·: · CCD 2 ..... A / D converter 3 ..... image processing section 4 ..... host computer 5 ..... signal processing section 6 .... Variable compression section 7 ..... US Β interface circuit The X degree of this paper applies the Chinese National Standard (CNS) A4 specification (2) 〇 × 297 mm {" · Please read the precautions on the back and then use this page)丨 '" Order 18 · 416229 A7 B7 V. Description of the invention 丨 6) 8 · · · • • Time control section 9 · * • • Overall control section 1 0 A · • • Interface cable _ l 0 B • Interface cable 11 ·· 12 ·· • 1/2 space circuit • 1/4 space circuit 13 ·· • △ YUV circuit 14,] .5 Switch circuit 16,] .7 _'Memory element 19 —— • Selection circuit 2 0 · . •. USB main socket 2 1 ·· • Surveillance camera 2 2 ·· •• External socket 2 4. .. Keypad 2 5 ·· •• Control register This paper size is suitable for China National Standard (CNS) A4 specifications (210X297 mm) -19-