TW305042B - - Google Patents

Description

A7 B7____ printed by the Beigong Consumer Cooperative of the Central Bureau of Economic Affairs of the Ministry of Economic Affairs 5. Description of the invention (/) <Scope of the invention> The present invention relates to the recording and reproduction of digital video data. More specifically, it relates to recording and reproduction-advanced TV signal (ATV Signal) ° <Background of the invention> The digital video recorder (DVCR) has developed into a versatile recording and reproduction device that can record ATV signals as video data and can be reproduced from the recorded digital video signals Into an ATV signal. In more detail, the research work on the standard picture quality video cassette recorder (SD-VCR) used to record and reproduce ATV signals has progressed to improve the recording format for special reproduction work, which can provide high-quality pictures Quality and meet the needs of the price. The ATV signal fed to the SD-VCR includes a transmission envelope with an MPEG-2 structure recommended by the Moving Picture Experts Group (MPEG). The traditional SD-VCR signal includes encoded data in a frame with a two-dimensional error correction code (ECC) structure. The coding used for error correction coding is usually a two-dimensional modified Reed-Solomon coding (R-Scode). In order to understand the two-dimensional error correction code, the conventional data byte system is considered to be arranged in columns and rows, and each column of bytes extends in a column direction, and each row of bytes extends in a row direction. For digital video SD-VCR error correction codes that extend in a row of directions, we call it internal coding, which is a type of coding called (85,8), in which 85 bytes of digital video per row Eight bytes are used to transmit parity information. For the digital video SD-VCr error correction code that extends in one line, we call it internal code, which is a code called (149, 11) type, where ^ -3- This paper k scale is applicable to the country Biaohua (CNS) A4 specification (210X 297 male &amp; --------- I installed ------ ordered -------- ^ (please read the precautions on the back before filling in this Page? A? B7 Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Invention Instructions ("X) 11 of the 149 bytes of digital video per line are used to transmit line parity information. In the process, after the external error correction coding is completed, that is, the 11-byte external parity is appended to the 138-byte external coding in the row direction, the internal error correction coding can be performed, that is, in the column The 8-byte internal parity is appended to the 77-byte internal code in the direction. The recording is performed row by row, one data synchronization block followed by another data synchronization block. The data is recorded according to the SD-VCR standard Work, and use 24/25 modulation, in which every three digits An extra bit is added at the beginning of the data character, and the result is subjected to the NRZI modulation of the stripe. The three bytes of each data character are based on the standardization before the NRZI modulation of the stripe. The pattern is randomized, and the standardized pattern is determined by the bytes to be recorded. The particular data modulation structure used during recording has nothing to do with the invention disclosed here. During the reproduction process, the reply was accepted After recording the bytes, the internal error correction decoding is first performed in the column direction. After the maximum value error of a 4-byte of 85 bytes is corrected, any uncorrected sync blocks have an additional appended to it Error flag. Then, perform external error correction decoding in the row direction to correct the uncorrected sync block, and the maximum can be corrected to 11 bytes in 149 bytes. In this process, the error flag can be used To confirm which synchronization blocks are to be corrected. Each frame of the SD-VCR signal is divided into 5 blocks, and each block includes the same number of huge blocks. For the original video data sent for recording News, each giant block contains a four-block part of the brightness component and the color cost paper iron standard is applicable to the Chinese National Standard (CNS) A4JUI grid (210X297 Gong Chu) (please read the back of the first: This page). Install, · Line 305042 B7 Printed and printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Invention description (3?) The corresponding part of the two spaces. According to the brightness and color in different types of giant blocks The relative spatial resolution of the information, each part of the individual color components includes 1.2 or 4 blocks, and corresponds to 4: 2: 0, 4: 2: 2 and 4: 4: 4 types of giant blocks, respectively. Each block of data is a square array of picture elements with 8 columns and 8 rows. The term &quot; block &quot; is used to refer to the discrete cosine transform (DST) of a square array of sampled picture elements after coding. The term &quot; giant block &quot; is used to refer to some Discrete cosine transforms (DSTS) of blocks are the codes generated after the coding work. These blocks are within the huge blocks of the original video information sent for recording. Normal playback and special effects playback are recorded in the individual blocks of the 1¾ signal portion of each track on the tape with the SD-VCR recording format. In order to shorten the length of the track block where special effect playback information is recorded, the special effect playback giant block uses the 4: 2: 0 format. The encoding of special effects playback data is essentially a pure frame encoding. Each frame is encoded independently of any other frame that uses frame DCT encoding; and the frame rate is the normal playback frame rate One-sixteenth. Generally speaking, when encoding special-effect playback data, it will use fewer DCT coefficients than the normal playback coding work, and essentially uses fixed-length encoding. In the coding of special effects projection information, there will be no omission of huge blocks. A 5-megablock-coded unit is formed by encoding a giant block from each block of SD-VC R, and is placed at a predetermined position, which is a special effect of the track on the recording tape. In the program segment. The number of bits per unit of the encoded 5 giant blocks is fixed and its size can be placed in a sync character. ____ -5 -__ (please read the notes on the back &amp; then fill in this page first) -install-, ιτ glandular paper ruler; litcaiJUsi: county (CNS) grid (21 () &lt; &lt; 297 Gongchu) Printed by the Central Bureau of Economic Affairs of the Ministry of Economic Affairs * K Industrial Consumer Cooperatives ^ A 7 B7 V. Description of invention () On the other hand, ATV signals are mainly coded data contained in the frame of the MPEG-2 standard clear structure, The coded data in these frames are interspersed between the coded data in irregular frames. This structure includes groups of coded data in the frames as clearly described below. These groups include: (1) Select the if video frame , This video frame does not need to be based on the information of other video frames, but can be encoded independently; (2) P data frame, you can encode the differences of each video frame in some predicted video frames, these predicted The video frame is predicted from the data in the previous frame by using the motion compensation of the adjacent video frame; and (3) B data frame, the difference of each video frame in some video frames can be encoded , These video frames are compensated by the movement of adjacent video frames And from the previous frame data or predicted frame data and the next frame data or predicted frame data in a two-way way to predict. For example, for a 16-frame GOP, the repeating frame pattern for each cycle is I-B-B-P-B-B-P-B-B-P-B-B-P-B-B. Among them, due to the scene change in the 16-frame GOP, it will be extremely wrong in the forward prediction, so it can be divided into two shorter GOPs, for example, IBB -PBBPBBPBB and BB, IBBPBBPBB and IBB -PBB, or It is IBB and IBBPBBPBBPBB. It can also be divided into three shorter GOPs, for example, I-B-B-P-B-B, I-B-B-P-B-B and I-B-B; or I-B-B-P-B-B-P-B-B, I-B-B and I-B-B; or one of the arrangement of these shorter GOP groups. It can also be divided into four shorter GOPs, such as I-B-B-P-B-B, I-B-B, I-B-B and I-B-B, or one of these shorter GOP groups. It can also be divided into five shorter GOPs, I-B-B, I-B-B, I-B-B, I-B-B and I-B-B. In any case, each of the first 1-6 (please read the notes on the back before filling in this page) -s This paper size is applicable to China National Standard (CNS) A4 specification (210X 297 Gong *) Ministry of Economic Affairs 305042 A7 B7 printed by the Employees ’Cooperative of the Central Bureau of Standards V. Description of the invention (6) The 6 frames will retain an I frame. This I frame is suitable for extracting special effects projection information from it. When an ATV signal has an MPEG-2 structure, these frame sequences are created. Explain that the coded data in the frame of the I video frame is independently coded without reference to any other video frame. However, following a video frame, when coding within the frame of the P and B video frames in each group of pictures (GOP), only the frame being encoded and another frame The difference between them will be coded, that is, using the intra-frame coding method of related coding. Therefore, if an error occurs during the decoding of one frame of the ATV signal, the error will propagate in the other frames in the relevant GOP unit with the relevant encoding. Since the ATV signal is mainly coded data in the frame, if an error occurs in the normal playback data of the ATV signal, the picture quality displayed by the SD-VCR will almost always be unacceptable. The previous method used to solve this problem is to configure a specific part in the normal playback data area. This part is called the ECC3 area and is used to store additional information to correct errors in the normal playback data. This part is an area other than the ECC1 area and the ECC2 area. The ECC1 area is used to store external parity information added to the external code, and the ECC2 area is used to store internal parity information added to the internal code. However, as far as the normal playback data itself is concerned, the result is a reduction in recording efficiency. Therefore, the inventor looked for a method of recording and reproducing digital video data, which can be used in an SD-VCR to record and reproduce an ATV signal. This method does not require a special ECC3 area, but can be reproduced normally At this time, the standard of this paper method can be improved and the Chinese National Standard (CNS) A4 specification (2 丨 0X297mm) is applicable ----------- (please read the precautions on the back vg before filling this page) Order Λ1 A7 printed by the I-Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs _________ B7____ V. Description of invention () The efficiency of correcting errors in normal projection materials. The inventor made many observations when considering how to find this method. Under normal circumstances, special-effect playback data will not be used as a still picture frame in one of the ATV SD-VCRs, due to the description-complete details 丨 the normal playback data of the data in the frame is stored in a picture The frame is stored in memory and is a partial step of decoding the atv signal in the ATV receiver, so the still frame operation can be achieved in the ATV receiver. Use normal playback data to complete the slow motion effect. The main point of incorporating special effect playback data in the recorded ATV is the use of playbackable fast forward and fast rewind modes, ie. It can complete the quick search of recorded data. If the special effects playback data process can be obtained from the coding frame in the frame, it is more satisfactory. This is because when implementing a viewable fast rewind mode for playback, there is no need to consider the correlation with the coding and decoding in the frame. The frame specifies the order. When encoding and decoding in-frame encoding, it is first assumed that the frames appear in a predetermined order in time, which will complicate the work of realizing the viewable fast rewind I-band mode because it does not Like the work in the fast-moving mode that can be watched, the coding frame in the previous frame here cannot be used as the basis for updating the real-time correlation decoding of the coding frame in a frame. For the inverse timing of the decoding process in the frame, it is necessary to provide enough memory space to store a whole 16_frame G0P, which will actually increase the cost of the recorder / regenerator. $ 卩 ¥ Special effect projection data can be taken purely from the coding frame in the picture frame, and if the IES projection data does not need to rely on the special effect projection data when encoding, the mil of the present invention provides an error-free correction of the entity of normal projection data Department and. ^ -8- This paper uses the Chinese standard Timu (CNS) A4 specification (210X 297mm ----------- (please read the precautions before filling in this Page ^ Order ^ Printed by the Ministry of Economic Affairs, Central Standards Bureau, Negative Work Consumer Cooperative V. Description of invention () The problem of correcting errors in special effects data is completely different. And the inventor also sees that in special effects materials The problem of correcting errors is not as severe as the problem of correcting errors in normal playback materials. Part of the factor is that those who watched to record the images reproduced by the SD-VCR signal will not put it in the viewable The quality of the special-effect playback image in the fast-forward and fast-rewind mode (called the fast search mode) is too important. When the special-effect playback image is only encoded in the frame, the error is corrected in the special-effect playback data The problem is not important The reason is that under this condition, the error will not be transmitted from frame to frame, just like the situation encountered when coding between frames. Daoxiang observation inspired the inventor and has an insight into the invention, That is, when determining the external bits to be added to the external code, you can exclude the special effect playback data. When you are working to determine the external bits and exclude the special effect playback data, you can use it in each line of the external code Reed-So 1 omon code with one of the fewer number of bits cleaned 0 However, for each line of external coding used for RS-coded SD-VCR, the number of bytes There has been a certain degree of standardization, and for compatibility reasons, the inventors found that a better method is to replace the row of special effect data with the row containing the specified byte when determining the external encoding parity byte. The work is carried out, that is, when decoding the RS code, before calculating the error correction, the column containing the predetermined bytes will replace the column of the special effect data, and the column containing the predetermined bytes will be treated as a constant. Corrections will be accepted, unlike variables, corrections will be accepted in the calculation of error corrections. When deciding to be appended to the external parity of the external code, exclude the N rows of special effects playback data _: _ -9- The speed of this paper Use China National Standards (CNS) Six 4 specifications (210 &gt; &lt; 297 meals --------- ^ Shiyi ------ ir ------ (line (please call first Read the notes on the back and fill out this page) 305042 A7 B7 Printed by the Beigong Consumer Cooperative of the Central Standards Bureau of the Ministry of Economy V. Invention description () Allows 11 bytes in the external parity to be corrected in the normal playback data 11 errors in one row of each byte, instead of 11 errors in one row of 149 bytes in normal playback data, of which 149-N bytes are normal playback data, N bytes Play material for special effects. Since N is generally around 30, as long as the special-effect projection data is excluded when calculating the external parity, the error correction capability of the normal projection data improvement can be provided. As for the error correction work of the special effects projection data, the internal error correction code can be used to perform it, or it can be completed by using its own separate external error correction code followed by the internal error correction code. To further correct errors in normal playback data, the two-dimensional R-S code can be scanned diagonally and traversed to obtain the bytes used for recording. During playback, a diagonal scan can generate a horizontal row of 2D RS codes for internal error correction decoding, and convert a burst error into an isolated single byte error per row. Byte errors are easier to solve for internal error correction decoding byte correction column capabilities. An error segmentation will be transformed into a majority of shorter error segmentation in the de-interlacing bar. This error segmentation will continue for an extended period equal to the number of rows, the number of these rows is less than that which can be caused by the internal error code The number of bytes in each column that can be corrected. Many of these shorter error segments can be corrected by internal error correction codes, so that for external error correction codes applied to normal playback data, error correction capabilities for longer bursts can be preserved. <Overview of the Invention> According to one aspect of the present invention, one is used to record and reproduce ATV signals -10- This paper scale is applicable to China National Profile Rate (CNS) A4 specification (210X297mm) (Read the notes on the back first (Fill in this page again) &quot; 'Installation_ Printed by the Consumer Cooperative of the Central Standardization Bureau of the Ministry of Economic Affairs Μ Β7 ____ V. The error correction coding function of the SD-VCR of the invention description () can be played normally after correction External error correction in the two-dimensional Reed-Sol omoη encoding of the data to exclude special-effect playback data from the encoding, with a view to improving the error correction capability for external error encoding of normal playback data. The same error correction code (used as the internal error correction code in the two-dimensional Reed-Solomon code of the normal playback data) is used in the special effect playback data and in the external error correction code Performed on the normal playback materials. According to another aspect of the present invention, the error correction coding function of the SD-VCR used to record and reproduce ATV signals can be modified to introduce two-dimensional Reed-Solonion for normal playback of data Encoded diagonal scan stripes are as if recorded on a video tape. During the playback of self-taped video, after the de-striping work is completed, the internal error correction code used for normal playback data can thus have the ability to correct the burst error, without reducing the ability of the external error correction code to correct the burst error . <Brief description of the diagram> The first figure is a diagram illustrating the video part format of the signal recorded on a digital video tape, which has an SD-VCR recording format. Figure 2 is an example diagram illustrating the setting of special effects playback data. The special effects playback data is located within the video portion of the signal recorded on a digital video tape with an SD-VCR recording format. Figure 3 is another example diagram illustrating the setting of special effects playback data. The special effects playback data is located in the video portion of the signal recorded on a digital video tape having an SD-VCR recording format. Figure 4 is a block diagram illustrating a method of making a point of view according to the present invention. ____________ ~ 11 &quot; ____ The size of this paper adopts the Chinese National Standard (CNS) A4 specification (210X297mm) &quot; ~ (Please first M Read the precautions on the back and then fill in this page.. Binding of the Ministry of Economic Affairs Central Central Bureau of Consumer Affairs Du Yin ¾. A7 B7 5. Invention Description () Digital video data recording device for recording digital video data. Figures 5A and 5B are diagrams for explaining the external and internal error correction coding operations. These operations are performed in the error correction coding unit shown in FIG. 4, and the data are arranged in the manner shown in FIG. Figures 6A and 6B are diagrams for explaining the external and internal error correction coding operations. These operations are performed in the error correction coding unit shown in Figure 4, and the data is arranged in the manner shown in Figure 3. Figures 7A and 7B are diagrams for explaining the special-effect playback data area shown in Figures 5A and 6B. Fig. 8 is a diagram illustrating a process of performing a stripe in the ECC block rearrangement unit shown in Fig. 4 'according to another viewpoint of the present invention regarding recording of digital video. Fig. 9 is a block diagram illustrating the internal structure of the ECC block rearrangement unit in Fig. 4 when the stripe process in Fig. 8 is in progress. Figures 10, 11, and 12 are diagrams illustrating the format of recording signals on a digital video tape according to one of the viewpoints of the present invention. Fig. 13 is a block diagram illustrating a digital video data reproducing device for reproducing digital video data, wherein the digital video data is recorded according to a method according to an aspect of the present invention. FIG. 14 is a diagram illustrating that a stripe process is performed in the ECC block reset unit of FIG. 4 instead of the stripe process between FIG. 8, which is another view of the present invention. Fig. 15 is a block diagram illustrating the internal structure of the reset unit in the ECC block of Fig. 4 when the stripe process is performed in Fig. 14; ---- -12- Read the standard Guanzhong @ ® 家 县 (CN $) A4 specifications (2 丨. X 297 public funds (please first MT * · Notes on the back and then fill out this page). Shi Yi. Order the Ministry of Economic Affairs Printed by the Central Standards Bureau Employee Consumer Cooperative. 〇05〇42 at B7 V. Invention description () <Detailed description of preferred specific examples> Figure 1 illustrates the data synchronization block structure of the video part of a signal. This signal is supplied To a digital video tape with an SD-VCR recording format for recording (we will refer to it as an ECC block in the following text). Each of the ECC blocks is listed as a separate data synchronization block. In the actual situation, it is a row-by-row record and scans from left to right. On a digital video tape, each video of a spiral recorded track includes 149 data used to describe the video and accompanying error correction code Synchronization blocks, these data synchronization blocks have 18 data synchronization blocks (not shown) containing a video preamble in the front and data synchronization blocks (not shown) containing a video preamble in the back . In order to develop can have special regeneration (a special Efficient &quot; DVCR for recording operation operation recording format, and this DVCR can provide high-quality pictures and can meet the price requirements. In the past, it has been suggested that the video tapes with ECC block structure shown in FIGS. 2 and 3 can be provided. The method disclosed in the present invention considers the method of improving the efficiency of error correction of normal playback data when the video data of the ECC structure shown in FIGS. 2 and 3 is normally reproduced and recorded when the patent specification is applied. 2 The ECC block structure shown in the figure is applied on a video tape with a recording format in which special-effect playback data is repeatedly recorded on non-overlapping pairs of adjacent tracks, and these non-overlapping The number of pairs is the same as the maximum number of multiple speeds. In addition, the special effect data area is set on a predetermined bit of each track. The structure of the E CC block shown in Figure 2 includes: as a The 19 111 and 20111 synchronization blocks of the first video data auxiliary area are used as the 21st to 126th synchronization area of the normal playback area-13- (please read the precautions on the back before filling this page) • -° This standard is applicable to China National Standard (CNS) A4 specification (210X29? Mm). Printed by the Consumer Standardization Bureau of the Ministry of Economic Affairs of the Ministry of Economy. 5. Description of invention () block, which is used as the special effects area from 12711 * to 156 "Sync block, a 156th sync block as one of the second video auxiliary data areas and 157" to 167 "sync blocks as external co-location areas. In addition, each sync block includes a 2-byte sync code , A 3-byte identification (ID) code, 77 bytes of data and 8 bytes of internal parity tail tag used for internal error correction codes. Use the recording method as shown in Figure 2 due to video scanning The work is carried out in the area of repeated recording without precise servo control, so the implementation of special effects does not significantly increase the manufacturing cost of the recorder / regenerator. However, 'due to repeated recording, a large part of the recording area is consumed. In addition, at lower multiple speeds, the frame rate will become quite low, causing the screen to flicker and obvious astringent movements, which may cause eye fatigue and damage the picture quality. The ECC block structure shown in FIG. 3 is applied to a video tape having a recording format in which special-effect playback data is recorded on the scanning area according to each multiple speed. In addition, a special effect playback data area is separately provided on each track. The structure of the ECC block shown in Figure 3 includes 19 sync blocks as a first video auxiliary data area, and the total number in the special effect data area of lstgkth is N (3〇) Sync block, the total number of M (105) sync blocks in the normal playback data area of "To ^", as a 156 "sync block in the second video data auxiliary area, and as 157th to 167th sync blocks of the external parity area. The m areas of normal playback data are one more than the k areas of special effect playback data in the illustration. Using the method shown in Figure 3, special-effect playback data can be incorporated in the ECC block, so that during the reproduction of fast search, ----—______ -14 · The size of the paper is 297 ^ * 1 -—- (Please read the precautions on the back before filling out this page) Order A7 _B7 printed by the Central Standards Bureau of the Ministry of Economic Affairs and Industry and Consumer Cooperatives 5. Invention description () A TV receiver on the screen The reproduced image will not have too much flickering, and the movement is generally smooth. However, due to the different speed settings, the corresponding areas have to be scanned selectively, so when special effects are played, the servo control of the operation must be made very accurate, which increases the cost. Figure 4 is a block diagram of a digital video data recording device. This recording device can perform some methods to improve the error correction capability of normal playback data on a video tape, where the video tape has the same as Figure 2 and 3 The EC C block structure shown in the figure. In FIG. 4, the video signal input to a preprocessor 10 is an ATV signal. Here, the ATV signal is a frame-encoded signal and is included in an MPEG-2 transmission envelope structure. The transmission packet structure includes a system layer of user data, an audio data layer, and a video data layer constructed according to the MPEG-2 specification. The preprocessor 10 can separate the video layer from the MPEG-2 transmission envelope, and can supply the divided video layer to the normal / special effect playback data generator 20. The separated video layer (which has the general properties described in the background of the invention) has groups of coded data within the frames, and these groups describe the selected I video frames, respectively, where the I video frames are independently coded and There is no need to rely on the information on another video frame; this video layer has groups of encoded data between frames, and these groups describe the difference between the P and B video frames and the predictions based on other video frames, respectively. The data in the frame of each 16th frame is used to generate the special-effect playback data of each image part recorded on the digital video tape. The normal / special-effect playback data generator 20 can select the data in the frame that has been independently encoded from the separate video layers, and decode each of them to restore the data used to describe _____- 15- _—__ The standard uses the Chinese National Standard (CNS) A4 specification (210X297mm) (please read the precautions on the back and then fill in K page). Pack. Order

Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 5. Description of Invention () Discrete Cosine Transform (DCT) block of video. Then the normal / special effect playback data generator 20 can generate special effect playback data for SD-VCR recording in the special effect playback data area. This work can be done by selecting some coefficients from each DCT block from the data in the decoded frame (in general, one DC coefficient and one or two AC coefficients are selected for each block), and according to MPEG -2 in the frame C I-frame) encoding process to encode them to be completed, it is better to use a fixed length code. Here, some of the same content as the codebook used when encoding the I-frame data for normal playback can also be used. Encoding the special-effect playback data in this way allows the same decoder and reverse encoding book used to decode the normal playback I-frame data when decoding during its reproduction, but if it is simpler In the case where the DCT block uses fixed-length encoding, the encoding efficiency of normal playback data may be lost. The normal / special-effect playback data generator 20 can also provide normal playback data for recording in the normal playback data area through all the data within the frame and the data between the frames encoded according to the MPEG-2 encoding process. Since the DCT coefficients of the frame encoded in the special-effect playback data are stored in the normal playback data encoded in the frame, the correction of errors in the normal playback data will not be determined by Corrected errors in special effects playback materials. -The combiner 30 can perform normal multiplexing processing on the normal playback data and the special effects playback data from the normal / special effects playback data generator 20 with a synchronization code and an identification code to release the normal / special effects playback data The video data generator 202IE often plays video data and special effects video data into an appropriate video synchronization block reserved for these two types of data. —Error correction code unit 4 _____ -16- The standard of this document states the specifications of Caiguanguan (CNS) M (21GX 297 publication) (please read the precautions on the back before filling in this page). Printed by the consumer cooperative 305042 A7 ___ B7 V. Description of the invention () 〇The data from the multiplexer 30 can be error-corrected and coded. The coding used to correct the normal projection data for error correction coding uses a two-dimensional Reed-Solomon code (RS code), but only the internal one-dimensional Reed-Solomon code of this two-dimensional code ( Reed-Sol omon) code is used for error correction coding of special effect projection data. An external error correction encoder 41 (included in the error correction encoder 40) can append an 11-byte external parity to each 138-byte sync block. The sync block includes (138- N) The external code of the byte and the following N-byte special effect playback data. The external error correction encoder 41 differs from the past in that the N-byte special effect projection data is not used to determine the 11-byte external parity. The replacement method is to replace the N-byte predetermined value with the N-byte special effect playback material. For example, when deciding the external parity 11-byte for the external error correction coding, for each byte of the N-byte of the parity block data, a separate arithmetic zero value can be used, and It is not a one-byte byte of N-byte bytes used for special effects. More broadly, for each line, any individual N arithmetic value pattern can replace the N-byte special effect projection data during recording to determine the external parity of the external error correction code 11 Bytes, and can be used to perform external error correction when decoding video signals for reproduction. This will lead to the use of multiple multi-dimensional data patterns for N-row predetermined bytes when determining external parity. The N-row bytes can be used to replace special effects playback data. If the byte is an 8-bit byte, the range of binary arithmetic values (used to replace each of the N-bit special effects data) with a predetermined nature is in the -8-dimensional bit Available in space -17- This paper is suitable for China National Standard (CNS) A4 specification (210X297mm) ---------: 士 4 ------ ir ------ Μ &lt; ί (please read the precautions on the back and fill in this page) A7 _B7 printed by the Employees ’Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of invention () from 0000 0000 (zero) to 1111 1111 (255). However, When determining external parity, it is better to use arithmetic zero values for each N-byte sync block data (used to replace N-byte special effect projection data). A pattern where all values are arithmetic zero values can be It is easy to generate, so there is no need to use a read-only memory to store the pattern of the data. In addition, in the calculation work, other matters related to the arithmetic zero value can be omitted, so the use of a pattern with all arithmetic zero values can simplify the external Calculation work for error correction, which is used in coding and subsequent The decoding of the recorded video signal will be carried out. Figure 5A illustrates a better way to perform external error correction calculations, which is the correction of the coding process in Figure 2, where the correction is made when calculating the external co-located Pod bit, At the input signal end supplied to the external error correction encoder 41, all special effect projection data will be replaced with arithmetic zero values. Figure 5B illustrates how the subsequent internal error correction calculation should be performed using the recovered special effect projection data And the special effect playback data will be supplied to one of the internal error correction encoders 42 included in the error correction encoding unit 40 of Fig. 4. The internal error correction encoder 42 may be similar to the method shown in Fig. 5B Calculate each internal parity encoded byte for 149 sync blocks, and append the 8-byte internal parity for each sync block to its 77-byte data. That is, the internal parity will Attached to all 149 video sync blocks, regardless of whether they contain normal playback data, special effects playback data, or external parity codes. In special effects reproduction mode, all The only data used is the data in the special effects playback data area, and the u-bytes related to the normal playback data -18- This paper also uses the Chinese National Standard (CNS) A4 Clam (210X 297 Public epidemic) --------- A,-f (please read the notes on the back first and then fill in the purchase)-* 5-^ _ A7 B7 V. Description of invention () External parity code and Not used. When the special-effect playback data is coded for internal error correction as shown in Figure 7A, the data in the special-effect playback data area contains only 30 77-byte rows of special-effect playback data and their respective Other additional 8-byte internal parity. Another feasible way is that the data used in the special effect reproduction mode can contain less than 30 77-byte rows of special effects playback data, when the data used is less than 30 77-byte rows of special effects When playing data, the remaining 30 77-byte rows are the external parity bytes generated by an external error correction code. Figure 7B shows a clear example of such another alternative. There are 25 77-byte rows of special-effect playback data and 5 77-byte rows of external parity bytes. This external parity byte consists of An external error correction code generated and used for these 25 rows of special effects playback data. In this alternative method, each 77-byte row of special-effect playback data and the external parity byte of each 77-byte row generated by an external error correction code and being used for the special-effect playback data Will accept internal error correction codes and append 8-byte internal parity. Printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the "Notes on the back" and then fill out this page). Step 6 describes a step in a method for specifically realizing the ideas of the present invention, and the timing of use is to display materials in special effects The position is as shown in Figure 3. When the input signal is supplied to the external error correction encoder 41 to calculate the external parity code bytes, all the bytes in the 1 "to 1 ^ special effects playback data area will be replaced by arithmetic zero values. Then, the special effects The projection data is restored in the data supplied to the internal error correction encoder 42 used to calculate the inner parity code bytes. The encoder 42 will divide 8- in each row in a similar manner as shown in FIG. 6B. The internal parity of the bytes is appended to the 77-byte data. The special-effect playback data does not have an external error correction code; or, in another way, -19- This paper uses the Chinese National Standard (CNS) A4 specification (210X 297 mm) 305042 A1 B7 V. Invention description () It has its own external error correction code and includes the external parity of special effects. External error correction encoder 41 and internal error correction encoder 42 It is usually composed of a microprocessor (UP) and a random access memory (RAM) device. In this situation, as long as the program plan of the microprocessor is changed, the transfer from the previous SD-VCR recording instance can be completed Change to external error correction encoder 41.-ECC block rearranger 50 (does not appear in the traditional SD-VCR (can be stripe error correction code data, as shown in Figure 8 The normal operation of the playback data is shown. In order to record on and reproduce from a digital video tape, the data is arranged on a diagonal line instead of a horizontal line. These pairs Columns of diagonal lines can be defined by scanning the data arranged in horizontal columns and vertical rows, so you can select the bytes that are the next row and the next column relative to the previous byte. These diagonal columns The scanning method is that the data arranged on the horizontal column and the vertical line will be mapped to the surface of a perfect circular cylinder, so that the zeroth line is after the 85 ^ line and before the first line. Such a procedure is called, Winding 〃 diagonal scan can create a complete diagonal scan, and each scan includes Η 9 bytes. The error segmentation that occurs on the recorded track will be played on @ 位 视频 带Diagonal columns during regeneration It will be recovered by the de-striping work and tends to appear as a single-error in the horizontal column of the ECC block. This can facilitate these errors by the internal error correction code used in the horizontal column of the ECC block Corrected. In more detail, some internal error correction codes in the ECC block--20- ^ ^ so the standard uses the Chinese National Standard (CNS) A # specification (21〇 297 mm) (please Read the precautions on the back first and then fill out this page) *-° Printed by the Central Consumers ’Bureau of the Ministry of Economic Affairs Employee Consumer Cooperative of the Ministry of Economic Affairs Printed by the Central Department of Consumers’ Cooperative of the Ministry of Economics A7 B7 V. Description of invention () Encoding data group Will be selected in the sequence D (0, q &gt;, D (i, o, D &lt; 2,2), D (3.3) ... D (84,84) for recording work, this recording The job is to scan the ECC block along track 1. Assuming that the ECC block bits stored in the random access memory are addressed by rows and columns using separate address counters, it is sufficient to work along the scan data byte of track 1 in the ECC block This is accomplished by column address counters and row address counters. Each counter starts with a different zero count output and calculates the address advance pulse added to it as a count input. Some arrays in the m columns of η bytes can be scanned completely and repeatedly, as long as the column address counter and row address counter are continuously counted; before the cycle of scanning begins to leave the remaining unscanned array, other The array will not be fully scanned. In the following cases, all m-byte multiplied by n-byte arrays can be completely scanned, that is, when the first address counter reaches the end of its loop to return its output count to zero count; another When the second address counter is overloaded with a value provided for the diagonal row counter, the diagonal row counter can count the number of times the first address counter reaches the end of its cycle. Figure 8 shows the results of selecting the first and second address counters as the column address counter and row address counter, respectively. Because of the result of winding diagonal addressing, there will be more columns than rows, and the data arranged in the horizontal and vertical rows will be mapped onto the surface of a perfect circular cylinder, so that the zeroth row will be in the 85th row After 'and before the first line. This selection is more likely to occur when the de-slicing work is carried out so that individual errors in the segmentation errors can be placed in different columns. A winding diagonal column will have 119 bytes, just like this paper music standard applies to the Zhongguan family system (CNS) M specification (public love) (please read the notes on the back before filling this page). .. Y5 Printed by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs $ 1 A 7 B7 V. Description of invention () One line. This is because the column address counter can allow continuous counting, and each time when the count value output by the row address counter output counter reaches zero, the row address counter becomes full. Scan the ECC block along track 1 to select the data sequence ϋ (Μ) π (1, υ D (, D (2,2), D (3.3) ···· D (84.⑷ can only be provided The first 119 bytes wraps 85 of the diagonal columns. For the first 119 bytes wrap diagonal of the remaining 34 bytes, it can be traced by 1 ' Scanning the ECC block, you can select the data sequence D (85, d), D (86M), ... D (m.33 ,. One of the error divisions along the trajectories 1 and 1 'can be scattered in the process of striping Since there is only one single byte error in the horizontal row of any data, assuming that there are not too many other byte errors in the horizontal row, you can use the bits inside the horizontal row. The error correction code can correct the error of a single byte. The column address counter responds to the next address advance pulse after the counter reaches 118 output counts, which is accumulated to a zero value output count; and the line The address counter will be fully loaded to provide an output count with a value of 1. The data sequence 0 (. Mountain, 0 (1,2), ... D (83, 84) is selected along the track 2. From the line address counter The output count value will accumulate to zero, and the output count value from the column address counter will advance to 84. When the row address counter and the column address counter continue their respective counting operations for the advancing pulse, they can follow One track 2 'to scan the ECC block, you can select the data sequence D⑻, 〇), D (85J) ......, D⑴8,3〇, to provide a second U9 byte winding diagonal The remaining 35 bytes of the line. The output count value from the column address counter will accumulate to zero, and the row address counter will be full to provide a count value of 2, so -22- _ this paper is common China National Standard (CNS) M specifications (2 丨 0X 297mm) (Please read the precautions on the back before filling out this page)

Si) 5〇42 B7 Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Description of the invention () You can start scanning the next winding diagonal line. Diagonal scanning can be continued in the general manner described above, while the last 119-byte winding diagonal row data scanning is performed in the following manner. The final winding of the diagonal row of scans begins with a scan along a track 85 to select the byte D ((), 84) to be recorded. This selection is in response to the output count accumulated by the column address counter to zero. This output count has occurred 84 times after the EC C block starts scanning. This will cause the row address counter to be fully loaded with an output count value of 84. . The output count of the row address counter will accumulate to zero value in response to the pulse advance of the next address, and the column address counter will continue its counting to produce an output count value of 1. Then the address counter will scan along a track 85 'to select a data sequence D (1,0)' D (2, l), ... D (85,84) ° Line address counter output count The value will accumulate to zero value in response to the advance pulse of the next address, and the column address counter will continue to count to produce an output count value of 86. Then the address counter will select a data sequence after scanning along a track of 85 &quot;, 0 (118,32) 9 to complete the scanning of all bytes in the ECC block. The task of defining a wrapped diagonal row with 119 bytes requires the ECC block resetter 50 to re-decode the data to form an 85-byte segment in order to cram the synchronization code and ID Space between codes. Select the first and second address counters to be row address counters and column address counters, respectively, to avoid resolving control code work like this, because such resolving control code work will define a 85 byte The complete diagonal row. However, a fairly long burst of errors will not be effectively distributed. If it is assumed that when the output counter of each row address accumulates to zero value, the column address counter ____- 23-_ Juju (CMS) A4 specification (2 丨 0; &lt; 297mm) (please read the precautions on the back and fill this page) ▲.

, 1T Rhenium Printed by Beigong Consumer Cooperatives, Central Bureau of Standards, Ministry of Economy ¾ A7 B7___ V. Description of invention () will be blocked and loaded by a continuous value. If the blocking load of the column address counter is corrected, the pattern of the column address counter can be made as close to continuous as possible, without placing a short program segment with a long and sudden error on the same horizontal column. Errors can be effectively distributed during the winding diagonal scan as shown in Figure 8. For column address counting, when doing the addressing work with the best blocking load read-only memory, the row address accumulated to zero can be used for counting. When defining a complete diagonal row so that it has the same number of bytes as the horizontal row, it is possible to include synchronization and identification codes on the diagonal strips, which can simplify strips and strips The timing of the program. The synchronization code does not change from one synchronization block to the next synchronization block. Therefore, if attention is paid to the details of the design, when these diagonal scan bars including synchronization and recognition codes are to be recorded on the tape, they will not affect the synchronization codes. These synchronous codes directly reproduced from the magnetic tape are used by the servo mechanism, which controls the relative movement between the magnetic head and the magnetic tape during playback. Since the averaging method can be used to protect the synchronization signal from being corrupted by sudden errors, another design possibility is to use diagonal scanning stripes including ID codes and internal codes, but excluding synchronization codes. Another possible setting is that the assembler 3 is not set at the position shown in FIG. 4 but is used after the Ecc block relocator 50. Figure 9 is a block diagram showing a method of constructing an ECC block resetter as shown in Figure 4. The first and second memories 51 and 52 can be written or read in an interleaved manner, and the previous data is read from the outside -__________ 24 · _ This paper uses the Chinese National Standards (CNS) A4 said grid (210X297 public |) (please read the notes on the back first and then fill in this page) •-° Printed A7 _ B7____ by the Ministry of Economic Affairs, Central Bureau of Preservation and Consumer Cooperative Fifth, the invention description () Will be written into one of the memories 51 and 52. A demultiplexer 56 can receive data from 108 sync blocks (105 normal regeneration sync blocks plus 3 video-assisted sync blocks) supplied from the internal error correction encoder 42 shown in Figure 4 Separated from their synchronization and recognition coding program sections. The relocated data can be supplied from a demultiplexer 57 and the control code will be decoded to become an 85-byte program section (performed by the settings not shown in the figure), so as to be compressed and recognized Encode the space within the program section. The signal obtained by this tightening process will serve as the video component of the modulation signal (applied to the modulator 60 in Figure 4), and this modulator 60 will supply the modulation output signal to be recorded on the tape. A control signal generator 55 can supply a normal playback / effect playback control signal N / T. This control signal N / T will be in the low state when instructing the internal error correction encoder 42 to supply the special playback row. . Therefore, the low state normal playback / special effects playback control signal N / T will determine the demultiplexer 56 to select the video data to send to its output A. This video data will be freely corrected as shown in Figure 4 It has been supplied in and has been separated from their synchronization and id encoding program sections. This MS state &quot; normal playback / special effects playback control signal n / T will make the demultiplexer 57 decide to select the data supplied from the output a of the demultiplexer 53 to its input A to apply to the display shown in The modulator 6 of Figure 4. Therefore, the special-effect playback data can be wound through the ECC block re-cutting setter 50, and their bytes can be recorded without relocation. The control signal generator 55 can supply a normal playback / effect playback control signal N / T. This control signal N / T will be high when instructing the internal error correction encoder 42 to supply the video line instead of the special effect playback line. state〃. Wrong internal ____- 25- This paper's latitude scale uses the Chinese National Standard (CNS) A4 specification (2 丨 0X 297mm) '' (Please read the precautions on the back before filling this page) i. Order The Ministry of Economic Affairs, Central Bureau of Standards, Employee Consumer Cooperative, Indo-Traditional Chinese A7 B7_ V. Description of the invention () When the error correction encoder 42 is supplied with a video sequence instead of a special effect projection sequence, the control signal generator 55 will also generate a The first read / write address 51 (ADDR1), a second read / write address (ADDR2) for the second memory 52, and a read / write control signal (R / W ). The write address generated from the control signal generator 55 is based on 0 (.,.), 0 ((), 1), D (() 2), ..., D (m, ⑷ Sequence of sequence addresses. However, the read address is generated in the direction of 1,1 ', 2,2', ..., 85,85 'shown in Figure 8, in other words, according to D (2,2) , D (3,3), ......, 0 (84,84) »〇 (85,0) &gt; 〇 (86.1) &gt; ......) 〇 (Π8,33) &gt; 〇 (〇, υ, D (1 (2),…, D (丨 丨 8,32) order. If the normal playback / special effects playback control signal Ν / Τ is a high state, that is When instructing the internal error correction encoder 42 to supply a video line instead of a special effect playback line, the demultiplexer 56 can choose to input to its output video data after the decision. This video data will be encoded from the internal error correction code in Figure 4 It is supplied in the multiplexer 42 and will be separated from their synchronization and I »code program sections. The video data at the output B of the demultiplexer 56 will be supplied to the input of another demultiplexer 53. * High state 〃The normal playback / special effects playback control signal N / T will cause the demultiplexer 57 to decide the data supplied from the output A of a multiplexer 54 to its input B in response to Used in the modulator 60 in Figure 4. If the read / write control signal is &gt; high &quot;, the first memory 51 will be determined to perform the reading operation, and the second memory 52 will be The decision is made to perform the writing work. The data stored in the first memory 51 will be read to the input A of a multiplexer 54 in the sequence shown in FIG. 8. The multiplexer 54 will be read by / Write the control signal to determine its work. When the control signal is a high state &quot;, the data will be selected. This data is read from the first memory 51 to its input A. -26-This paper uses the Chinese national standard. (CNS) A4 specification (2 丨 OX 297mm) Γ 木 II (Please read the precautions on the back before filling this page)

* 1T A 7 B7 Printed by the Consumer Labor Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 5. Invention description () and then sent to the input A of the multiplexer 57; the multiplexer 57 will be controlled by the normal playback / special effects playback signal N / T To determine its working condition, when the control signal is “High”, the multiplexer 54 will supply the data read from its input A to the modulator 60 in FIG. 4. The working condition of the demultiplexer 53 is determined by the read / write control signal. When the read / write control signal is a high state, the demultiplexer 53 will select the output terminal of the demultiplexer 56 Input video data, and select it to output A. These video data were originally supplied from the internal error correction encoder 42 in FIG. 4 and separated from their synchronization and ID encoding program sections, and then written to the second memory 52. If the read / write control signal is the state #, then the first memory will be determined for writing, and the second memory will be determined for reading. The data stored in the second memory 52 will be read to the input B of the multiplexer 54 in the sequence as shown in FIG. The working status of the multiplexer 54 is determined by the read / write control signal. When the read / write control signal is &gt; low state &quot;, the multiplexer 54 can choose to read from the second memory 52 to its input The data of B, and then send it to the input A of the multiplexer 57; and the working condition of the multiplexer 57 is determined by the normal playback / effect playback control signal N / T, when the control signal N / T is &quot; high At the time of operation, the multiplexer 57 supplies the data read to its input A to the modulator 60 in FIG. 4. The working status of the multiplexer 53 will be determined by the read / write control signal. When the control signal is "low", the multiplexer 53 will select the video data supplied from the output of the demultiplexer 56 to its input , And then send it to output B. These video data were originally supplied from the internal error correction encoder 42 in Figure 4 and have been separated from their synchronization and IM code program sections, and then written to the first memory Body 51. -27- (Please read the precautions on the back before filling this page)

L -s Dingben paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 305042 A7 B7 The Ministry of Economic Affairs Central Standards Bureau employee consumer cooperative printed five 'invention description () applied to the modulator 60 complete modulation The signal encoding format will be as shown in Figures 10, 11 and 12. Each line of encoding is recorded on a separate spiral recording track. Figure 10 shows the complete modulation signal format, which is recorded in a pair of magnetic The special-effect playback data on the track is repeatedly recorded on adjacent tracks of non-overlapping pairs, and the number of adjacent tracks of these non-overlapping pairs corresponds to the maximum value of multiple speeds. Each track includes an audio sync block, a pre-first sync block, a special effect playback sync block for recording special effect playback data, a normal playback sync block for recording strip data, and One after another sync block. Figure 11 shows that the tape has a recording format, in which the special effect playback data is placed in the scanning area corresponding to each multiple speed. The special effect playback data shown in FIG. 11 Has an audio sync Block, one-first-one sync block, one special-effect synchronization sync divided into a predetermined number of areas (K), one normal-sync sync area divided into m = (k + l) areas to record inter-strip data, and One after another sync block. Figure 12 shows an example of how to record data alternately on two track cycles according to the recording format of Figures 10 and 11. Figure 12 shows an example of how ATV records It can solve the disadvantages of low-picture quality that occurred in the recording format shown in Figure 10 and the high-price defects that occurred in the recording format shown in Figure 11. Therefore, according to Figures 10 to 12 In any of the recording formats shown, in the case of recording stripe data in the normal playback synchronization block, even if a burst error occurs on the track, this burst error can be converted into random sending -28- (please Please read the precautions on the back before filling out this page) Γ Pack. -Β The size of the paper is printed in China National Standard (CNS) Α4 Specification (210X 297mm) Printed by the Ministry of Economic Affairs Central Standards Bureau Beigong Consumer Cooperative Α7 Β7 V. Description of the invention () After an independent error Corrected. Figure 13 shows a digital video data reproduction device that performs these methods in accordance with the present invention. This reproduction device regenerates data from a digital video tape according to an operation sequence of 1 row. This operation sequence is essentially The procedure opposite to the recording operation procedure used when the recording device shown in Figure 4 (Figure 4 and Figure 13 are on the same page). The data reproduced from the tape will be demodulated in a demodulator Π0 A reverse ECC block relocator 120 can strip the demodulated video data to restore the original ECC block structure data sequence. The general structure and ECC of the reverse ECC block relocator 120 The block relocator 50 is similar, and the recorder / regenerator device can use a common device to perform both functions. The difference between the reverse ECC block relocator 120 and the ECC block relocator 50 is that the two memories are written instead of read. The winding diagonal address is used, and the two memories are read Instead of writing the system uses horizontal column by horizontal column addressing. There is no ECC block relocator 120 in the prior art regenerator device. The de-sliced data is subjected to error correction decoding in an error correction decoding unit 130. In other words, one of the internal error correction decoders 131 of the unit 130 can correct the multi-master 4-byte error for each 85-byte sync block, and add a Error flag. The internal error correction of a two-dimensional Reed-SGlomcn code is a certain number of bytes, and the number of bytes is equal to half of the number of internal parity bytes. Because the error flag can indicate those positions that may be wrong, the external error correction amount of a two-dimensional Reed-Solomon code is a certain -29- This paper uses the Chinese National Standard (CNS) A4 specification (210X297 mm) I -------- install ------ order ------ ^ A (please read the $ item on the back and then fill in this page) A7 B7 5. Description of the invention () Tuples, the number of bytes is equal to the number of externally co-located bytes 0 diagonal striping and stripping procedures will make the burst error span the row and column of the two-dimensional Ree (J-Solomon coding array Arranged on the corner line. Because the burst error crosses the array of coding arrays, the internal coding has the ability to correct substantially long burst errors. This does not reduce the amount of long burst error correction for external coding. This correction is the source The self-burst error is a row that crosses the coding array. The diagonal bars cross (in terms of coding) horizontal (internal) error correction codes and vertical (outer) error correction codes. So both codes have Essential long burst error correction capability. Regardless of the form of diagonal scanning, The partial error correction code can correct burst errors, as long as the number of scan lines where these burst errors occur is less than the number of errors that can be corrected by the internal error correction code. Under the assumption that a single byte error does not need to be independent from the correction, The 8-byte internal error correction code can correct one burst error of up to 4 scan line lengths. Because burst errors of the same length as the sample length in the four scan lines can be used without setting an error flag, The internal error correction code is corrected, so the ability of the external error correction code to correct the burst error (this burst error will be maintained at the number of samples in 11 horizontal rows) will not be suspended by the burst error. Another length and 11 A burst error with the same number of diagonal scan lines can also be corrected, as long as it does not appear in the same horizontal column as the burst error considered first. The length of the longest correctable single burst error is still the same as the precedence The length in the technology is the same. However, the obvious difference is that it can correct short burst errors without relying on external coding. This is The error that occurred in the magnetic recording sequence is very likely to be short -30- This paper size is used in the Chinese National Standard (CMS) A4 specification (210X297mm) --------- 1 installed— ( Please read the note $ item on the back first and then fill out this page) Order Λ Printed by the Beigong Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs ¾ Printed by the Ministry of Economic Affairs, Central Bureau of Economics and Trade Cooperatives A7 _ B &quot; ____ V. Description of invention () Sudden errors. When performing external error correction decoding, one of the external error correction decoders 132 in the error correction decoding unit 130 will replace the special effect projection data with a predetermined N times 77 bytes pattern (this pattern (Replace external error correction codes when they work). As a result, up to 11 erroneous bytes in each line of the 149-N normal playback byte can be corrected by external error decoding, instead of normal playback and special effects playback at 149 as in the prior art Up to 1 byte in each row of bytes can be corrected. In other words, when there are 30 columns of special-effect playback data, for each row of 119 normal playback bytes, up to 11 error bytes can be corrected by external error correction decoding work. Burst errors that occur in the special effects playback column do not require any error correction capability in the external error correction code, so recurring long burst errors in normal playback data are most likely to be coded by external error correction codes Corrected. The rest of the regenerator device in Figure 13 is similar to that used in the prior art. In the separator 140, the synchronous encoding and the identification encoding are separated from the normal playback and special effects playback output (from the error correction decoding unit 130) of the error correction decoding. A normal / special effect playback data generator 15 includes a multiplexer that can receive normal playback and special effects playback data in which synchronous encoding and identification coding have been separated, and generates normal playback according to the normal and special effects reproduction modes And special effects information. Then, a reverse pre-processor 160 can change the normal playback and special playback data output from the normal / special playback data generator 150 to a transmission package structure to be supplied as a reproduction ATV signal. -31-This is the gg family box twin (CNS) Α4% square (210X 297mm) (Poetry first »/: Read the back of the book-; 1 Yi Shishuo refill &gt;? too 1) installed Printed by M Consumer Central Bureau of Consumer Standards. Printed by the staff. 5. Description of the invention () Sudden error correction in the special-effect playback data. No special-effect playback data is required to have their own external error correction codes, as shown in the first section. 7 Sun shown. On the contrary, they can accept diagonal scanning and striping procedures, so their internal error correction codes will have the ability to correct burst errors. Figure 14 shows how the entire output signal from the internal error correction encoder can be accepted by the winding diagonal scanning strip to provide diagonal scanning for normal playback rows, special effects playback rows, and external parity rows Strips. The length of each coiled diagonal scan will be increased from 11 to 149 bytes, so it can reduce very long burst errors and cause 4 bytes per column or 11 bytes per row The possibility of error. Therefore, it is possible to increase the ability to correct the burst errors of both internal and external error correction codes. Fig. 15 shows how the ECC block relocator 50 can be simplified by accepting the winding diagonal scanning stripe for the normal playback row, the special effect playback row, and the external parity row. The first memory 51 and the second memory 52 are replaced with the first memory 510 and the second memory 520, respectively, and each memory has the ability to store 149 sync blocks. The demultiplexer 56 and the multiplexer 57 do not need to be used, so a simpler control signal generator 550 can be used to replace the control signal generator 50. For the first read / write address (AD DR 1) of the first memory 510, the second read / write bit a (ADDR2) of the second memory 520 and the-read / write control signal ( R / W) is relatively easy to generate, because these functions are not needed when recording special effects data. The memory addressing generated by the reverse ECC block relocator 120 when playing special effect playback data does not need to be paused, and thus is simplified. Generally speaking, after the two-dimensional Reed-Solomon coding, the diagonal is -32-the length of this scale is based on the Chinese National Standard (〔? ^) 厶 4 specifications (210 &gt; &lt; 297mm) ---- ---- 1 Loading ------ Order ------ ^ (Notes on the back of Xu Xianfu's poems and then fill in Qiong page) A7 5. Description of invention () Scanning the strips to prepare materials is extremely important Usefully, this data is used to transmit a channel of the transmitter, and this channel can tolerate burst errors that are longer than the internal coding. For example, it is also useful to encode digital signals to be embedded in NTSC television signals during the tracking time. Diagonal scanning and de-slicing work before 2D Reed-Solomon decoding is also generally helpful in designing receivers for use in such transmitters. Those skilled in the art should understand that the above disclosure can design various preferred specific examples of the present invention that have been clearly described, and this point should also be kept in mind when explaining the scope of the patent application scope below. {'-訂 ^ &quot; (Xu Xianfu read the back & -Important matters and fill in &quot; this page) Printed by the Ministry of Economic Affairs Central Standardization Bureau Employee Consumer Cooperative-33- This paper is used in the Chinese national standard (CNS) A4 ^ grid (210X297mm)

Claims (1)

No. 84110291 "Use: Error Correction Code Encoding and ^ Face Procedures for Recording and Digital Video Selling of Public Health" Patent No. ^ Life Patent Scope Revision Ι 本 六 Application for Patent Scope Diagnosis and Prevention Year 1 ~ ^ 1 ~-Supplement 1. A method for generating digital video data in response to an ATV signal, the ATV signal including independently decodable frame data supplied in a predetermined time schedule, and including independently decodable images between the predetermined time schedules Frame data, the method includes the following steps: using the independently decodable frame data supplied in a predetermined time schedule, and the independently decodable frame data between the predetermined time schedules as normal playback Data; * Extract special effect projection data from the independent decodable frame data supplied in the predetermined time schedule; encode the normal projection data (excluding the special effect projection data) for external error correction coding to Generate the normal projection data of the external error correction code; the extracted special effect projection data and the normal error correction code of the external error correction code are listed as a data structure group translator ; The data for internal junction of the column broken utensil error correction coding to generate coded for each column in the interior of the individual. 2. If you apply for __No.! The method of item, the external error correction coding of the permanent projection data (excluding the special effect projection data) is carried out in the direction of the normal projection data, and the normal projection data is increasing bribes- The legs of the book will be included in the data structure, and the book data; ^ The number of money and the data taken from the special effects data are dependent on the details, and the line The direction is orthogonal to the individual column direction of each of the columns. 3. If you apply for a special plane _ 丨, the hard-to-find information includes ______- 34- 'This Hyun ft scale is used in the S Ε home mining standard (QN-S) A4JDl grid (210X297 public -------- η Read first Sj if ,, Γq Page: 玎 Pattern 9999 ABCD The Ministry of Economic Affairs Central Bureau of Accreditation ec industrial and consumer cooperatives printed «L individual predetermined number of each byte in the pattern. 4. As in the method of claim 3, the predetermined number of each byte in the pattern is the same. 5. The method as claimed in item 4 of the patent application, in which each predetermined number of each byte in the pattern is an arithmetic zero value. 6. If the method of claim 1 is applied, the step further includes a stripe step, and the data structure can be scanned diagonally to be supplied at the predetermined position of the magnetic track on the magnetic tape. The recorded normal playback data. 7. If the method of applying for patent scope item〗, further includes a step, the data structure can be diagonally scanned to supply the predetermined position on the magnetic track on the magnetic tape for recording The normal playback data and the special effects playback data. 8. As in the method of applying for the first item of Patent Fan Garden, in a method for supplying the normal playback data and special effect playback data for recording at the predetermined position of a magnetic track on a magnetic tape, It also includes a random recording step, which is characterized by repeatedly recording special-effect playback data at a predetermined position of many pairs of non-overlapping adjacent magnetic tracks, the number of which corresponds to the maximum multiple speed. 9. As in the method of claim 1 of the patent application, in a method for recording on the predetermined position of the magnetic track on the magnetic tape, a random recording step is further included, and the digital video data is responsive to -An ATV signal is generated, and the random recording step is characterized by recording special-effect playback data on a scanning area corresponding to each multi-speed. -35- The speed of Bennu Zhang's standard use of China National Standard (CNS) Α4 wash grid (210X297mm) '--- Please read the note I read the bag A8 printed by the Central Standard Bureau of the Ministry of Economy. _ B8 SQ5042 dS 6. Scope of patent application 10. For example, the method of item 1 of Shenfu Patent Park, a method for recording at the predetermined position of the magnetic track on a magnetic tape, including a random The recording step, the digital video data is generated in response to an ATV signal * The random recording step is characterized by the fact that many pairs of non-overlapping adjacent tracks are alternately recorded on every two track cycles at special positions. The number of shadow data corresponds to the maximum multi-speed, and special effects are recorded on one scan area relative to each multi-speed. 11. A method for reproducing the digital video data of normal playback materials and special effects playback data recorded at a predetermined position on a magnetic track on a magnetic tape using an MTV signal. An ATV signal * This ATV signal is included in a predetermined schedule The yellow material of the independently decodable frame and the dependent decodable round frame data supplied between the predetermined time intervals, and the special effect projection data are from the permafrost decodable round frame provided during the predetermined time interval In the form of data extraction, the normal playback data excludes the special-effect playback data and then undergoes external error correction coding, which can generate normal error-corrected encoded normal playback data. • The extracted special-effect playback data and external The normal playback data of the error correction code can form a data structure, and the row of this data structure will correct each internal error correction code. The method of regenerating the normal playback data and special effects playback data includes the following steps: Corrected internal errors on the magnetic clamp_code normal playback data and special effects playback data; incorporate the internal error correction codes for normal playback materials and special effects playback data Error correction decoding work; In a normal regeneration mode, replace a 36 ~ this paper with the data of a predetermined pattern. The Chinese National Standard (CNS) A4 specification (210X297 mm): ^ 1τ ---- -^ (f (please read the precautions on the back and then fill out this page) _ 〇0 [ί042 Α8 BS C8 D8 6. Correct the decoding of special effects playback data within the patent application range, and play the normal playback The data is decoded for external error correction to supply the normal playback data that has been decoded as the external normal error correction data for reproduction. In a special mode, the special effect playback data with the internal error correction code is supplied. 12. The method of applying for item 11, wherein the predetermined data includes individual predetermined numbers of each byte in the pattern. 13 · The method of applying for item 11 of the patent model garden, where each of the patterns The individual predetermined numbers of the bytes are the same. 14. As in the method of claim 11 of the patent application range, the individual predetermined numbers of each byte in the pattern are arithmetic zero values. Central Ministry of Economic Affairs Printed by the ®C Industrial and Consumer Cooperative (please read the $ item on the back and then ^ write this page) 15 · For the method of applying for item 11 of the patent scope, where the data structure has been scanned diagonally in a bar To supply stripped normal playback data for recording at the predetermined position on the magnetic track of the magnetic tape, the method for reproducing normal playback data and special effects playback data further includes a preliminary Work, that is to say, the normal playback data of the stripe and the special effect playback material of the stripe are to be stripped to regenerate the data structure and supply the result of the stripped strip as I described. Internal error correction Encoded normal playback data and special effect playback data. For example, the method of applying for patent Fanyuan Item 11, wherein the data structure has been diagonally scanned in a strip process to locate the magnetic track of the tape Describe the normal playback data of the stripe and the special effect playback data of the stripe provided for recording at the predetermined position. The method for reproducing the normal playback data and the special effect playback data further includes a preliminary work, Coming soon • The 37 paper scales are applicable to the Chinese National Standard (CNS) Α4 wash grid (210Χ2? 7mm) Ministry of Economic Affairs Central Bureau of Standards Beta; printed by the industrial and consumer cooperatives A8 B8 C8 D8 _ Six. The normal playback data of the stripe and the special effect playback material of the stripe are used for de-striping to regenerate the data structure and supply the result of the stripe as the normal playback data of the internal error correction code. And special effects information. 17. A method of recording and reproducing digital video data, which is generated in response to an ATV signal, which includes independently decodable frame data supplied in a predetermined time schedule and at the predetermined time Dependent decodable frame data supplied between processes, the method includes the following steps: extracting special effect projection data from the independent decodable frame data supplied in the predetermined time schedule to supply the extracted special effect projection data; Use the independently decodable frame data supplied in the predetermined time schedule and the dependent decodable frame data supplied in the predetermined time schedule as normal projection data; use the normal projection data as External error correction code, and replace the special-effect projection data decoded with the internal error correction code with a predetermined pattern of data for the external error correction code to generate normal projection data of the external error correction code; The extracted special effect projection data and the normal projection data with the external error correction code mentioned above are translated into a data structure; The data structure is listed as the internal error correction code to generate the normal playback data and special effect playback data with the internal error correction code; the data structure is used to scan the diagonal stripe to generate the internal error correction of the stripe Encoded normal playback data and special effects playback data; record the stripe at a predetermined position on the magnetic track of a digital video tape -38-This paper size is applicable to China National Soap (CNS &gt; grid (210X297mm ) ~ &Quot; .— ^ ---- ^ — ί. (Please read the notes on the back to write this page) Printed by the Consumer Labor Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. 6. The normal playback data and special effects playback data with the internal error correction code applied for the patent application park; reproduced from the predetermined position of the magnetic track of the digital video tape. Corrected encoded normal playback data and special effects playback data with internal error corrections that have been striped; encoded normal playback data and special effects playback data that have been internally corrected and coded with the internal errors corrected on the digital video tape Perform de-slitting work; perform normal error correction and encoding of the normal playback data and special-effect playback data obtained from the de-striping operation; in a normal reproduction mode, use a reservation The pattern data replaces the special-effect projection data that has been decoded with internal error correction, and the normal projection data is decoded as external error correction to supply normal projection data that has been decoded as external normal error correction reproduction data; In a special effects reproduction mode, special effect playback data with internal error correction codes is supplied. 18. The method as claimed in item 17 of the patent application, wherein all the bytes of the predetermined pattern of the data are arithmetic zero values. 1 &amp; A method of recording and reproducing digital video data, which is generated in response to an ATV signal, which includes independently decodable frame data supplied in a predetermined schedule and in the predetermined schedule The dependent decodable frame data supplied between the time, the method includes the following steps: extracting the special effect projection data from the independent decodable frame data supplied in the predetermined time schedule to supply the extracted special effect projection data; The independently decodable frame data supplied during the predetermined time period and the dependent decodable frame data supplied during the predetermined time period are used as normal playback data; National Rubbing Standard (CNS) AOJL grid (210X297mm) • ”矣 4 * ?!.: 1. Α8 Β8 C8 D8 VI. Scope of patent application The normal projection data will be coded for external error correction * and will be prepared with one of the data for the external error correction code. Replace the special effect tightening data with internal error correction decoding to generate normal error correcting encoded data of the external error; the row of the extracted special effect highlighting data and the normal playing of the external error correcting encoding The data is listed as a data structure translation work; the data structure is listed as an internal error correction gong code * Μ Generates normal playback data and special effect playback data with internal error correction code 15; the data structure (Including the normal playback data and its internal error correction code) The column and the data structure (including the external error correction code and its internal error correction code) are listed as diagonal stripe scanning work. Corrected internal error correction data of the normal playback of the code; recorded the normal playback of the internal error correction code of the stripe at a predetermined position on the track of a digital video tape Video data and special effects playback data; J reproduces the normal playback encoded material and the special effects playback data of the internal error correction code of the stripe from the predetermined position of the magnetic track of the digital video tape; The normal playback data of the internal error correction code of the stripe reproduced on the video tape is used for striping; the normal playback data of the internal error correction code obtained from the stripping work and Special effects playback data for internal error correction decoding; In a normal reproduction mode * Use a predetermined pattern of data to replace the internal error correction decoded special effects playback data, and use the normal playback data as an external error 5 To correct the decoding, Μ will supply the normal playback data that has been decoded as an external error to reproduce the normal playback data; the paper standard for a special effect regeneration horizontal format is applicable to the Chinese National Standard (CNS) Α4 说 格 (210X2971, #? (Please Please read the precautions on the back before filling in this page). Pack. Order Α8 Β8 C8 D8 305042 In the patent application scope, supply the special effect projection data with the internal error correction code. 20. The method as claimed in item 19 of the patent application park, in which all the bytes of the predetermined pattern of the material are arithmetic zero values. Transmission of error correction bytes of data in the electrical signal of the medium. This method includes the following steps: analyzing the data bytes to form a first two-dimensional data structure with an array of rows and rows of bytes; using A first Reed-Solomon code, using the bytes of each row in the first two-dimensional data structure as a stub code to generate a second two-dimensional array of byte arrays with column-by-row rows Yellow material structure, the second two-dimensional data structure includes individual row bytes corresponding to each row of bytes in the first two-dimensional data structure; use a second Reed-Solomon code The bytes of each column in the second two-dimensional data structure are used to perform P-code encoding work, and M generates a third two-dimensional data structure with an array of byte arrays for each row, the third The two-dimensional data structure includes relative data in the second two-dimensional The individual row bytes of each row byte in the data structure; the data strips formed by M rows by row array in the third two-dimensional data structure, that is, they are scanned diagonally to generate one-dimensional data Structure; and converting the one-dimensional data structure into a signal that can be transmitted through the medium. 22. For example, the transfer method of item 21 in the application of the Patent Fan Garden, where the steps between the above-mentioned-~ -41-This paper standard applies to China National Standards (CNS) Α4 specifications (210X297 mm) (please read first (Notes on the back and then fill out this page)-Min. Ordered by the Ministry of Economic Affairs, Central Ladder and Accreditation Bureau Cooperative Consumer Cooperative Printed Sixth, the scope of patent application is scanned diagonally in the third two-dimensional data structure. The data formed by the row array is used to select the row next to the previous byte-the row and the next column. 23 · —A receiving method that provides error correction for the internal and external encoded data of the stripe. The internal and external encoded data of the stripe is received from a transmission medium that is subject to continuous burst errors and Before the electronic device is converted into an electronic signal form for error correction, the internal and external coded data of the stripe is a form obtained from the result of a transmission method. This method includes the following steps: analysis of the data Bytes, to form a first two-dimensional data structure of a byte array with column-by-row rows; using a first Reed-Solomon code, place the bits in each row in the first two-dimensional data structure The group performs external coding work to produce a second two-dimensional data structure with a byte array of columns, rows and rows. The second two-dimensional data structure includes a data structure corresponding to the first two-dimensional data structure. The individual row bytes of each row of bytes in the column; using a second Reed-Solomon code, the bytes of each row in the two-dimensional data structure are externally encoded to produce a row multiplier A third two-dimensional data structure of a row of byte arrays, the third two-dimensional data structure including individual row bytes corresponding to each row of bytes in the second two-dimensional data structure; The data strips formed by the column-by-row array in the third two-dimensional data structure, that is, they will be diagonally scanned to produce a one-dimensional data structure; and ____- 42- This Hyun-zhang scale uses medium B Η Standard (CNS) A4 specification (210X297mm) (please refer to} of the first} ± intention to «write this page} and order J $ 6. Apply for the scope of patent (please first κ« regard the precautions of δ (This page) converts the one-dimensional data structure into a signal that can be transmitted through the medium. This signal will be received as the internal and external encoded data of the stripe. The connection method includes the following steps: The internal and external coded data of the sliver is converted into an electronic signal to regenerate the first-dimensional data structure, which is sometimes contaminated by bit errors, and the bit errors are sometimes included in the burst Among the errors, some of the burst errors are Extended burst error, the number of bits extended by this extended burst error is more than the number of bits that can be corrected in the second Reed_sol οποη code in a row; remove the regenerated first-dimensional data structure Striping to generate the second one-dimensional data structure, and each of the extended burst errors is distributed among successive ones of the third two-dimensional data structure; according to the second Reed-S〇Um〇n code decoding technology, the second two-dimensional data structure is internally decoded to regenerate the second two-dimensional data structure, the second two-dimensional data structure sometimes The remaining part of the bit error will be contaminated; according to the decoding technology used for the first Reed-SQUmQn code, the row of the first-dimensional data structure is externally decoded to regenerate the The first one-dimensional data structure 'and the remaining part of the bit error can be reduced or eliminated; and the bit group applied to the electronic device is selected from the first two-dimensional data structure. 2ί For example, the receiving method of the 23rd scope of the patent application, wherein the stripping step is used to cancel the operation, this strip is to work in the third second ------- 43- Use Zhongsi E Winter Standard (CNS) A4 specification (2 × 10297 public love) — _ ABCD VI. Scope of patent application Dimensional data structure arranged by column-by-row array for diagonal scanning to select the next The next byte of the first byte and the next byte of the next row (please note this page first and then write this page) • You can use this paper standard in the B country standard (CNS) A4 specification (2丨 0X297 public love) -44-