A7 4846在0<〇/8)髟 9 R7 五、發明說明（（） 本發明是關於一種信號處理技術、用於數據記錄。本 發明更是關於一種系統及方法用於以類比信號紀錄數位數 .據。 目前由於半導體製造技術之高度進展，能處理大量位 元數據之數據裝置也踉著被發展。例如、數位電視（DTV) 及高畫質電視（HDTV)等高能力數據裝置，於現在及未來 之電子產品中，將成爲日常生活中之主要產品。這些高能 力數據裝置都必須具有能力，以處理大量位元數據且快速 傳送這些位元數據。因此、具有高數據記錄密度及能快速 傳送這些數據之記錄器必須因應發展，以配合高能力數據 裝置之使用。如此、拍攝自日常生活中之數據錄影信號， 就可有效的被計錄及重新在數據裝置上播放、例如在數位 電視上播放。 因此本發明提供一種用類比信號記錄數位數據之方 法，以增加記錄密度，例如100十億位元/英吋平方，此 記錄密度約爲目前時下最大密度之十倍。本發明利用一痕 跡側頻（Vesttigial SideBand，VSB)-調頻（FM)技術以增加雜 訊比（Signal Noise Ratio, SNR)之功率。本發明也利用一脈 衝幅度調解（Pulse Amplitude Modulation, PAM)技術來包裝 一複數個位元，而記錄成一調頻脈衝信號。再以時下狀態 (state-of-the-art)記錄磁頭來達成高記錄軌密度。 本發明提供一種用類比信號記錄數位數據之方法，利 用一痕跡側頻(VSB)技術配合調頻技術，以達成痕跡側頻_ 調頻之類比記錄及播放方法。本發明之方法包括提供一二 3 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 、裝--------訂——；---T丨-線！ 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消費合作社印製 t _ 4 60 8 d 9 4846twf.doc/〇〇8 五、發明說明（>) 進位數據列。於此二進位數據列，每隔一某數個位元數據， 用一脈衝幅度調解(PAM)技術將其轉成一數値，其中某數 個位元(N-bit)數據又稱爲一某數個位元包。如此、此二進 位數據列被轉換成一符號數據列，每一符號代表該數値。 本發明之方法更這符號數據列之數値轉換成一類比信號， 而成爲一類比信號列。這類比信號列接著以調頻技術被記 錄到一記錄磁性媒介體，其中調頻脈衝信號之脈衝寬度以 細化等化技術（Sliming Equalization Technology)進行縮 減’以達成倍增記錄密度。類比信號係經由一時下狀態 (state-of-the-art)記錄磁頭來達成高記錄軌密度。如此、此 二進位數據列可以用調頻形式之類比信號，被記錄於磁性 媒介體。本方法中，每一個符號之某數個位元包並不一定 有相等之某數個(N)。換據話說。平均後之某數個(N)不一 定爲整數。但是整數之某數個(N)是一較佳方式。 本發明之方法更利用痕跡側頻-調頻(VSB-FM)技術以 增加20分貝（dB)之雜訊比功率以達至55分貝之程度可 供後續技術之利用。本發明之方法利用一脈衝細化等化技 術，以達成倍增記錄密度，如此、記錄密度可達成每一英 吋可記錄200,000調頻遷越信號。因此、於一英吋中共可 達成某數個(N) X 200,000個調頻遷越信號，其中某數個(N) 較佳約爲二至五位元。於記錄誤差容許範圍，本發明也包 括高於五位元之方式。本發明之方法更利用時下狀態 (state-of-the-art)記錄磁頭來達成高記錄軌密度，其中錄軌 密度可達到1〇〇,〇〇〇軌/英吋，並且利用液體軸承來減少 4 (請先閱讀背面之注音？事項再填寫本頁) —裝 訂——；——|!绛， 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 經濟部智慧財產局員工消費合作杜印製 A7 B7 五、發明說明（、） 約10百分比之軌道空間誤差。上述記錄磁性媒介體可包 括一~^式錄放影機(VCR)，也可包括一磁碟。 當本發明之方法應用於播放時，上述類比信號列可從 記錄磁性媒介體取出。再將此類比信號列取樣回復成一符 號數據列，接著再將此符號數據列回復成一二進位數據 列，用於播放。 爲讓本發明之上述和其他目的、特徵、和優點能更明 顯易懂’下文特舉一較佳實施例，並配合所附圖式，作詳 細說明如下： 圖式之簡單說明： 第1A圖繪示一傳統之類比調幅信號，此類比信號每 隔一段固定時間被取樣一點； '第1B圖繪示傳統之調頻方式以紀錄一類比調幅信 號，取自第1A圖之取樣點； 第1C圖繪示一調頻脈衝信號之脈衝寬度，以細化等 化技術進行倍縮之結果； 第2圖繪示本發明之一類比信號及其對應之二進位數 據列； 第3圖繪示本發明使用之磁阻磁頭，以調頻方式記錄 類比信號；以及 第4圖繪示本發明，將一二進位數據列轉換成一符號 數據列之方法。 MMM- 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 訂-----m^ly. A7 B7 '460859 4846twf.doc/008 五、發明說明（d) 本發明使用一痕跡側頻(VSB)技術配合調頻技術，又 稱痕跡側頻-調頻技術’以增加20分貝之雜訊比功率。這 能利用一脈衝幅度調解（PAM)技術，以一符號數據列來記 錄一二進位數據列’其中每一符號數據代表一某數個（N) 位元（N-bit)之數値。此某數個位元又稱爲一某數個位元 包。脈衝幅度調解(PAM)技術，例如已應用在數據機上， 用以快速傳送資料。對於此二進位數據列，每隔某數個位 元就轉換成一符號數據，每一符號數據又以對應之一類比 電位之方式記錄之。上述每一個某數個位元(N-bit)包所含 之位元數目不一定都相等，雖然較佳之方式是相等的。換 句話說，平均之某數個位元(N-bit)不一定是整數。例如每 隔兩個及三個位元交替得一符號數値。詳細之符號轉換方 法將描述於後。 上述所增加之雜訊比，可允許本發明使用細化等化技 術（Sliming Equalization Technology)，以縮小調頻脈衝信 號之脈衝寬度，進而使得記錄密度倍增。另外、也可允許 本發明使用時下狀態（state-of-the-art)記錄磁頭，例如磁阻 磁頭（Magnetoresistive，MR)，以增加記錄軌密度。因爲本 發明使用痕跡側頻-調頻技術，本發明有足夠之信號雜訊 比功率可供使用，以增加數據記錄密度。如此，本發明將 三者技術適當修改組合後，可以非習知預期地大量提高數 位數據之記錄密度。較詳細之實施例描述如下。 利用區塊伺服驅動技術(Sector Servo Technology)對時 下狀態之磁碟來存取數據時，其需要一新的信號處理方 6 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 裝--------訂·------ ^---^^(vr . 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消費合作社印製 460859 A7 4846twf.d〇c/008 qj 五、發明說明（s ) 式，以配合調頻技術’進行映像(Video)記錄。假定類比信 號，例如映像信號，是以調幅方式記錄，其傳同上雜訊必 然很大。這是由於磁頭與記錄物質之間的接觸面品質不 良。痕跡側頻-調頻技術(VSB-FM)因此被Ampex提出，以 排除接觸面品質不良之問題。此技術可參見E.E Anderson 發表之文章：”Motion Picture and Television Engineers, Vol.67，Noll，pp 722，Nov_ 1958”。因爲 Ampex 提出之痕跡 側頻-調頻技術(VSB-FM)可有效排除接觸面品質不良之問 題，於映像記錄上，信號雜訊比(SNR)之功率可提升20分 貝。此提升量又稱爲調頻提升量。然而、調頻提升量必須 用記錄頻寬來換取。於痕跡側頻-調頻技術(VSB-FM)中， 其沒有足夠之頻寬可用，但是20分貝之提升量可以降低 十倍之雜訊値。這使得卡式錄放影方式成爲可行之方法， 其傳統上可達約30分貝之信號雜訊比功率。若以磁阻磁 頭(MR)來記錄映像，其典型地可達約35分貝之信號雜訊 比功率。因調頻提升量，痕跡側頻-調頻(VSB-FM)記錄方 式共可有55分貝可用。 這痕跡側頻-調頻（VSB-FM)記錄方式，基本上是用調 頻方式以記錄類比信號。第1A圖繪示一傳統之類比調幅 信號’此類比信號每隔一段固定時間被取樣一點。第1B 圖是傳統之調頻方式以紀錄一類比調幅信號，取自第1A 圖之取樣點。 請參照第1A圖及第1B圖，一類比調幅信號每隔一段 固定時間Μ被取樣一點，如此得到一相對應之幅度a,。此 7 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 裝 —.—訂-------：—線/V. 經濟部智慧財產局員工消費合作社印製 460859 A7 4 846 twf.doc/00 8 g7 i、發明說明（6 ) 幅度ai，以調頻方式進行記錄，如第1B圖所示。每一遷 越脈衝，對應於每一取樣點，而被記錄在一記錄軌上。邊 越脈衝之間之距離AL反比於幅度ai之大小。距離也 可正比於幅度a;(未示）。其選擇決定於實際設計。假定有 足夠之取樣點數目，根據取樣點之幅度，此類比信號可準 確地被重建。爲了倍增記錄密度，遷越脈衝之寬度必須縮 減。請參照第1C圖，一般記錄密度之脈衝寬度’以細化 等化技術技術將之縮減。如此、遷越脈衝之間之解析度可 以增加，記錄密度因此倍增。此一細化等化過程約需要7 分貝。 除了細化等化之考慮外，本發明還須考慮其他因素， 以有效利用可用之信號訊比功率。第2圖繪示本發明之一 類比信號及其對應之二進位數據列。請參照第2圖，圖中 本發明利用一脈衝幅度調解(PAM)原則，以類比方式來記 錄一二進位數據列。圖中類比號被取樣多點，每一取樣點 又稱之爲一符號。一符號之數値是由一某數個位元包所 得。圖中某數個(N)例如等於二(N=2 bits)。實際上，平均 某數個(N)不一定是整數。另外、如果信號誤差允許的話， 某數個（N)可大至十。如果信號誤差太大，其將造成信號 失真。 於此例，因某數個（N)等於二，其有四個準位。每一 準位也對應於一電位値。經轉換後，此二進位數據列組成 一電位類比信號。此電位類比信號可用痕跡側頻-調頻 (VSB-FM)記錄方式，記錄於一磁性紀錄媒介體，例如一 8 (請先閱讀背面之注意事項再填寫本頁) I裝 訂---------β 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 經濟部智慧財產局員工消費合作社印製 4 6 0 8 5 9 A7 4846twf.doc/〇〇8 B7 五、發明說明（？） 磁碟，一磁帶及—^式錄放影機卡帶’三者其一。 本發明利用此脈衝幅度調解（PAM)原則，類似於數據 機（Modem)所使用之一脈衝幅度調解（PAM)方法，如此可 記錄大量位元數據’並且可快速傳送位元數據，以供數據 顯示裝置，如數位電視等’之錄製與播放。 本發明利用卡式錄放影機(VCR)來記錄位元資料，其 可達至一百萬位元每英吋之記錄密度。目前、用磁阻磁頭 (MR)來記錄映像，其典型可以有35分貝之信號雜訊比。 本發明更利用痕跡側頻-調頻(VSB-FM)記錄方式，總共可 達55分貝。爲了增進記錄軌密度，其約需又15分貝，如 此可將傳統之3000軌/英吋，提升至100,000軌/英吋。其 方法描述於後。爲了倍增於記錄軌上之記錄密度，如前述， 其需7分貝。所以、仍有33分貝剩下，可供脈衝幅度調 解(PAM)方法之使用。於33分貝之基本要求下，其可達成 每一調頻遷越信號可對應儲存5位元資料。 時下之卡式錄放影機可達至100,000遷越信號/英吋。 當7分貝用來倍增於記錄軌上之記錄密度，卡式錄放影機 可達之200,000遷越信號/英吋。以一中心頻寬爲5MHz之 痕跡側頻-調頻(VSB-FM)記錄方式爲例，在20%外加頻寬 下’一調頻遷越信號對應儲存5位元資料，是在可接受之 誤差範圍之內。如第1A圖所示，一取樣點對應一遷越信 號。如此，本發明可達至5個位元之位元包。如此、於一 記錄軌上，其記錄密度可達至1百萬位元/英吋。 於上述本發明中，如何增進記錄密度之方法已描述。 9 本紙張尺度適用中國國家標準（CNS)A4規格（21〇 χ 297公釐） -----------裝--------訂——^----Ί·^(τ (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 460859 A7 4846twf.doc/008 扣 五、發明說明（3 ) 進一步要考慮的是’如何增進記錄軌密度。傳統之記錄軌 密度僅有3000軌/英吋。以下本發明揭露一方法以達至本 發明預期之記錄軌密度100,000軌/英吋。如此，根據本發 明，總記錄密度可達100 Gbit/英吋平方，Gbit=十億位元。 這比IBM公司所宣稱之1〇 Gbit/英吋平方，高出十倍。 於西元I975年，Kanai等人發表一文章（IEEE on Magnetics, Vol. Mag-11，No· 5，pp.1212-1214, Sept. 1975)。 文章討論用磁阻磁頭以達成記錄軌密度100,000軌/英吋之 可能性。理論上100,000軌/英吋是可達成，然而其必需有 足夠之信號雜訊比功率。於其文章發表之時，100,000軌/ 英吋無法被達成’由於信號雜訊比功率不足。另外、在磁 碟機之機械方面，爲降低數據存取伺服驅動誤差，傳統之 滾珠軸承必須用液體軸承代之。第3圖繪示本發明使用之 典型磁阻磁頭。磁阻元件爲一磁性薄膜，形成於一基板上。 薄膜之寬度爲Δί。若是At等於0.2微米，則記錄軌密度 爲100,000軌/英吋。 於本發明中’因爲採用調頻方式記錄數據，有20分 貝之調頻提升量，如此100,000軌/英吋之記錄軌密可以達 成。此部份’約需15分貝之信號雜訊比功率。而採用液 體軸承爲磁碟機之數據存取伺服驅動（servo)，其空間準度 可達至1微英吋’或是10%之軌間距。 上述本發明方法之結論如下；本發明利用痕跡側頻_ 調頻(VSB-FM)記錄方式，以提升信號雜訊比功率至55分 貝’其中15分貝用以達成1〇〇,000軌/英吋之記錄軌密，7 本紙張尺度適用中國國家標準（CNS)A4規格（21〇 X 297公愛） (請先閱讀背面之注意事項再填寫本頁)A7 4846 in 0 < 〇 / 8) 髟 9 R7 V. Description of the invention (() The invention relates to a signal processing technology for data recording. The invention relates to a system and method for recording digits with analog signals According to the current development of semiconductor manufacturing technology, data devices capable of processing large amounts of bit data are also being developed. For example, high-capacity data devices such as digital television (DTV) and high-definition television (HDTV) are now being developed. And future electronic products will become the main products in daily life. These high-capacity data devices must have the ability to process a large amount of bit data and quickly transmit these bit data. Therefore, it has a high data recording density and can quickly The recorder that transmits these data must be developed to match the use of high-capacity data devices. In this way, data recording signals taken from daily life can be effectively recorded and replayed on data devices, such as digital television Therefore, the present invention provides a method for recording digital data by analog signals to increase the recording density. For example, 100 billion bits per inch square, this recording density is about ten times the current maximum density. The present invention uses a Vesttigial SideBand (VSB) -frequency modulation (FM) technology to increase the noise ratio ( Signal Noise Ratio (SNR) power. The present invention also uses a Pulse Amplitude Modulation (PAM) technology to pack a plurality of bits and record it as a frequency-modulated pulse signal. State-of- the-art) recording head to achieve high recording track density. The present invention provides a method for recording digital data with analog signals, using a trace side frequency (VSB) technology and frequency modulation technology to achieve the track side frequency _ analogue recording of frequency modulation and Playing method. The method of the present invention includes providing one, two and three paper sizes that are applicable to Chinese National Standard (CNS) A4 specifications (210 X 297 mm) (please read the precautions on the back before filling this page), and install ---- ---- Order ——;-T 丨 -line! Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs and printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs and printed by t_ 4 60 8 d 9 4846twf.doc / 〇〇8 V. Invention Explanation (>) carry data sequence. In this binary data sequence, every other certain number of bit data is converted into a number using a pulse amplitude modulation (PAM) technique, in which a number of bits ( N-bit) data is also called a certain number of bit packets. Thus, the binary data sequence is converted into a symbol data sequence, and each symbol represents the number. The method of the present invention changes the number of the symbol data sequence. It is converted into an analog signal and becomes an analog signal sequence. This type of analog signal sequence is then recorded to a recording magnetic medium using FM technology, in which the pulse width of the FM pulse signal is reduced by Sliming Equalization Technology ' To achieve a doubled recording density. The analog signal achieves a high recording track density via a state-of-the-art recording head. In this way, the binary data sequence can be recorded on a magnetic medium using an analog signal in the form of frequency modulation. In this method, the number of bit packets of each symbol does not necessarily have the same number (N). In other words. The number (N) after averaging is not necessarily an integer. But a certain number (N) of integers is a better way. The method of the present invention further uses the trace side frequency-frequency modulation (VSB-FM) technology to increase the noise specific power of 20 decibels (dB) to a level of 55 decibels, which can be used by subsequent technologies. The method of the present invention utilizes a pulse thinning technology to achieve a multiplied recording density. In this way, the recording density can achieve 200,000 FM transition signals per inch. Therefore, in one inch, the Chinese Communist Party can achieve a certain number of (N) X 200,000 FM transition signals, of which some (N) are preferably about two to five bits. The present invention also includes a method of higher than five bits in terms of the allowable range of recording errors. The method of the present invention further utilizes a state-of-the-art recording head to achieve a high recording track density, wherein the recording track density can reach 100,000 tracks / inch, and a liquid bearing is used to Decrease 4 (please read the note on the back? Matters before filling out this page) —Binding ——; —— |! 绛, This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) Intellectual Property of the Ministry of Economic Affairs Bureau's consumer cooperation Du printed A7 B7 V. Description of invention (,) The orbit space error is about 10%. The above-mentioned recording magnetic medium may include a video recorder (VCR) or a magnetic disk. When the method of the present invention is applied to playback, the above-mentioned analog signal train can be taken out from the recording magnetic medium. The analog signal sequence is sampled and restored into a symbol data sequence, and then this symbol data sequence is returned into a binary data sequence for playback. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is exemplified below, and in conjunction with the accompanying drawings, the detailed description is as follows: Brief description of the drawings: FIG. 1A A conventional analog AM signal is shown, and the analog signal is sampled at a fixed period of time; Figure 1B shows the traditional FM method to record an analog AM signal, taken from the sampling point of Figure 1A; Figure 1C Shows the pulse width of a frequency-modulated pulse signal and the result of scaling down using the thinning and equalization technique; Figure 2 shows an analog signal of the present invention and its corresponding binary data sequence; Figure 3 shows the use of the present invention A magnetic resistance magnetic head records analog signals in a frequency-modulated manner; and FIG. 4 illustrates a method for converting a binary data sequence into a symbol data sequence according to the present invention. MMM- This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) Order --- m ^ ly. A7 B7 '460859 4846twf. doc / 008 5. Description of the invention (d) The present invention uses a trace side frequency (VSB) technology in conjunction with the frequency modulation technology, also known as the trace side frequency-frequency modulation technology 'to increase the noise specific power of 20 dB. This can use a pulse amplitude modulation (PAM) technique to record a binary data sequence with a symbol data sequence ', where each symbol data represents a certain number of (N) bits (N-bits). These certain bits are also called a certain number of bit packets. Pulse amplitude modulation (PAM) technology, for example, has been applied to modems to quickly transfer data. For this binary data sequence, every few bits are converted into symbol data, and each symbol data is recorded in a way corresponding to an analog potential. The number of bits contained in each of the above-mentioned N-bit packets is not necessarily equal, although the preferred methods are equal. In other words, the average number of bits (N-bits) is not necessarily an integer. For example, every two and three bits alternate to obtain a symbol 値. The detailed symbol conversion method will be described later. The increased noise ratio described above allows the present invention to use slimming equalization technology to reduce the pulse width of the FM pulse signal, thereby doubling the recording density. In addition, the present invention may also allow a state-of-the-art recording head, such as a magnetoresistive (MR) head, to increase the recording track density. Because the present invention uses a trace side frequency-frequency modulation technique, the present invention has sufficient signal-to-noise ratio power available to increase the data recording density. In this way, the present invention can undesirably increase the recording density of digital data by combining the three technologies with appropriate modifications. A more detailed embodiment is described below. When using Sector Servo Technology to access the current state of the disk, it needs a new signal processor. 6 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm). Li) (Please read the precautions on the back before filling out this page) Install -------- Order · ------ ^ --- ^^ (vr. Printed by the Intellectual Property Bureau Employees Consumer Cooperatives of the Ministry of Economic Affairs Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs and Economics 460859 A7 4846twf.doc / 008 qj V. Description of invention (s) format to cooperate with FM technology for video recording. Assume analog signals, such as video signals, It is recorded in amplitude modulation mode, and the noise above it must be very large. This is due to the poor quality of the contact surface between the magnetic head and the recording material. Trace side frequency-frequency modulation technology (VSB-FM) was therefore proposed by Ampex to exclude the contact surface. The problem of poor quality. This technology can refer to the article published by EE Anderson: "Motion Picture and Television Engineers, Vol. 67, Noll, pp 722, Nov_ 1958". Because of the trace side frequency-frequency modulation technology (VSB-FM) proposed by Ampex Can effectively exclude contact surfaces In the case of poor quality, the signal-to-noise ratio (SNR) power can be increased by 20 decibels on the image recording. This increase is also called the FM boost. However, the FM boost must be exchanged for the recording bandwidth. On the trace side In the frequency-frequency modulation technology (VSB-FM), there is not enough bandwidth available, but the 20 dB increase can reduce the noise by ten times. This makes the cassette recording and playback method a feasible method, which traditionally can Signal-to-noise specific power of about 30 dB. If the image is recorded with a magnetoresistive magnetic head (MR), it can typically reach signal-to-noise specific power of about 35 dB. Due to the amount of FM boost, the trace side frequency-frequency (VSB) -FM) recording method can have a total of 55 decibels available. This trace side-frequency-frequency (VSB-FM) recording method basically uses FM to record analog signals. Figure 1A shows a traditional analog AM signal. The analog signal is sampled once every fixed period of time. Figure 1B is a traditional FM method to record an analog AM signal, which is taken from the sampling point of Figure 1A. Please refer to Figures 1A and 1B. Fixed at intervals Sample M is sampled a little, so as to obtain a corresponding range a. This 7 paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) Install —. — Order -------: —line / V. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 460859 A7 4 846 twf.doc / 00 8 g7 i. Description of the invention (6) The range ai, with Record in FM mode, as shown in Figure 1B. Each transition pulse is recorded on a recording track corresponding to each sampling point. The distance AL between the edge pulses is inversely proportional to the magnitude ai. The distance can also be proportional to the amplitude a; (not shown). The choice depends on the actual design. Assuming a sufficient number of sampling points, such analog signals can be accurately reconstructed based on the amplitude of the sampling points. In order to double the recording density, the width of the transition pulse must be reduced. Referring to FIG. 1C, the pulse width of the general recording density is reduced by thinning and equalizing techniques. In this way, the resolution between transition pulses can be increased, and the recording density is therefore doubled. This refinement and equalization process takes about 7 dB. In addition to refinement and other considerations, the present invention must also consider other factors to effectively use the available signal-to-signal power. FIG. 2 illustrates an analog signal and its corresponding binary data sequence according to the present invention. Please refer to FIG. 2. In the figure, the present invention uses a pulse amplitude modulation (PAM) principle to record a binary data sequence by analogy. In the figure, the analog number is sampled at multiple points, and each sample point is also called a symbol. The number of symbols 値 is obtained from a certain number of bit packets. A certain number (N) in the figure is equal to two (N = 2 bits), for example. In fact, the average number (N) is not necessarily an integer. In addition, if the signal error allows, some number (N) can be as large as ten. If the signal error is too large, it will cause signal distortion. In this example, since some (N) are equal to two, they have four levels. Each level also corresponds to a potential 値. After conversion, these binary data columns constitute a potential analog signal. This potential analog signal can be recorded in a trace side frequency-frequency (VSB-FM) recording method on a magnetic recording medium, such as 8 (Please read the precautions on the back before filling this page) I Binding --- --- β This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 4 6 0 8 5 9 A7 4846twf.doc / 〇〇8 B7 V. Description of the invention (?) Magnetic disk, a magnetic tape and a ^ -type video cassette player's one of the three. The present invention utilizes this pulse amplitude mediation (PAM) principle, which is similar to a pulse amplitude mediation (PAM) method used by a modem, so that a large amount of bit data can be recorded 'and the bit data can be quickly transmitted for data. Display devices, such as digital TVs, for recording and playback. The present invention utilizes a cassette recorder (VCR) to record bit data, which can reach a recording density of one million bits per inch. At present, images are recorded with a magnetoresistive magnetic head (MR), which typically has a signal-to-noise ratio of 35 decibels. The present invention further uses a trace side frequency-frequency modulation (VSB-FM) recording method, which can reach a total of 55 decibels. In order to increase the recording track density, it needs about 15 decibels, which can increase the traditional 3000 tracks / inch to 100,000 tracks / inch. The method is described later. In order to double the recording density on the recording track, as mentioned before, it needs 7 decibels. Therefore, there is still 33 dB left, which can be used by the Pulse Amplitude Modulation (PAM) method. Under the basic requirement of 33 dB, it can achieve that each FM signal can store 5 bits of data correspondingly. Today's cassette recorders can reach 100,000 transition signals / inch. When 7dB is used to double the recording density on the recording track, the cassette recorder can reach 200,000 transition signals / inch. Take a trace side frequency-frequency (VSB-FM) recording method with a center bandwidth of 5MHz as an example. At 20% of the additional bandwidth, a FM transition signal corresponds to 5 bits of data, which is within an acceptable error range. within. As shown in Fig. 1A, a sampling point corresponds to a migration signal. In this way, the present invention can reach a bit packet of 5 bits. Thus, on a recording track, the recording density can reach 1 million bits / inch. In the above-mentioned present invention, a method for improving the recording density has been described. 9 This paper size applies to China National Standard (CNS) A4 (21〇χ 297 mm) ----------- installation -------- order ---- ^ ---- Ί · ^ (Τ (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed 460859 A7 4846twf.doc / 008 V. Explanation of the invention (3) Further consideration is' how to improve Recording track density. The conventional recording track density is only 3000 tracks / inch. The following invention discloses a method to achieve the expected recording track density of 100,000 tracks / inch. Thus, according to the present invention, the total recording density can reach 100 Gbit / inch square, Gbit = one billion bits. This is ten times higher than the 10 Gbit / inch square claimed by IBM. In I975, Kanai et al. Published an article (IEEE on Magnetics, Vol. Mag-11, No. 5, pp. 1212-1214, Sept. 1975). The article discusses the possibility of using a magnetoresistive head to achieve a recording track density of 100,000 tracks / inch. Theoretically 100,000 tracks / inch is possible Achieved, however, it must have sufficient signal-to-noise ratio power. At the time of publication of its article, 100,000 tracks / inch could not be achieved 'Because the signal-to-noise ratio power is insufficient. In addition, in the mechanical aspect of the magnetic disk drive, in order to reduce the data access servo drive error, the traditional ball bearing must be replaced by a liquid bearing. Figure 3 shows a typical magnetic used in the present invention. Magnetoresistive head. The magnetoresistive element is a magnetic thin film formed on a substrate. The width of the thin film is Δί. If At is equal to 0.2 micron, the recording track density is 100,000 tracks / inch. In the present invention 'because the frequency modulation method is used for recording Data, there is a 20-dB FM boost, so that a 100,000-track / inch recording track density can be achieved. This part 'requires about 15-dB signal-to-noise-to-noise power. And liquid bearings are used for data access of the disk drive Servo drive, its spatial accuracy can reach 1 microinch 'or 10% of the track pitch. The conclusion of the above method of the present invention is as follows; the present invention uses the trace side frequency_frequency modulation (VSB-FM) recording method, In order to increase the signal-to-noise ratio power to 55 decibels, 15 decibels are used to achieve a record track density of 10,000 tracks / inch. 7 paper sizes are applicable to the Chinese National Standard (CNS) A4 specification (2 10 × 297 cm Love) ( Notes on the back read and then fill this page)
A7 B7 460859 4846twf.doc/008 玉、發明說明（η ) 分貝用以達成倍增於磁軌上之記錄密度，而33分貝用於 脈衝幅度調解（PAM)方法之使用。本發明達成一記錄密度 100 Gbit/英吋平方，其中記錄誤姜約在l〇_1°bit之程度。 本發明之記錄密度約十倍於傳統最佳之記錄密度。 本發明特徵如下，本方法可以用類比信號，達成極高 數位記錄密度。本方法利用一痕跡側頻-調頻技術以增加 雜訊比之功率。因此允許本發明也利用一脈衝幅度調解 (PAM)技術來包裝一複數個位元，而記錄成一調頻脈衝信 號。本方法也利用細化等化技術，進行縮減調頻脈衝信號 之脈衝寬度，以達成倍增記錄密度。再以時下狀態（state-of-the-art)記錄磁頭來達成高記錄軌密度。採用液體軸承 之數據存取伺服驅動裝置，以降低記錄軌間距誤差。本發 明將習知之技術，做一些修改及獨特之組合後，使得數位 記錄密度及其傳輸速度能大量提升。 雖然本發明已以一較佳實施例揭露如上，然其並非用 以限定本發明，任何熟習此技藝者，在不脫離本發明之精 神和範圍內，當可作各種之更動與潤飾，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爲準。 (請先閱讀背面之注意事項再填寫本頁) ,'·'ν 裝--------訂---^----Γ!線 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐）A7 B7 460859 4846twf.doc / 008 Jade, invention description (η) Decibel is used to achieve the recording density multiplied on the magnetic track, and 33 dB is used for the pulse amplitude modulation (PAM) method. The invention achieves a recording density of 100 Gbit / inch square, in which the recording error is about 10_1 ° bit. The recording density of the present invention is about ten times higher than the conventional best recording density. The features of the present invention are as follows. This method can use analog signals to achieve extremely high digital recording density. This method uses a trace side-frequency-frequency modulation technique to increase the power of the noise to noise ratio. This allows the present invention to also use a pulse amplitude modulation (PAM) technique to pack a plurality of bits and record it as a frequency modulated pulse signal. This method also uses thinning and equalization technology to reduce the pulse width of the FM pulse signal to achieve doubled recording density. Then, a state-of-the-art recording head is used to achieve a high recording track density. Adopting liquid bearing servo drive for data access to reduce the recording track pitch error. The present invention makes a number of modifications and unique combinations of known technologies, which can greatly improve the digital recording density and transmission speed. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and decorations without departing from the spirit and scope of the present invention. The scope of protection of the invention shall be determined by the scope of the attached patent application. (Please read the notes on the back before filling out this page), '·' ν Pack -------- Order --- ^ ---- Γ! Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Paper size applies to China National Standard (CNS) A4 (210 X 297 mm)