MXPA97007116A - Device and method for recording picture information - Google Patents

Abstract

A table generator (200) outputs a jump address (290) based on data (220) representing a GOP number, data (250) representing a picture number, data (270) representing the time at which a picture is reproduced in a normal reproduction mode, and data (190) representing the sector address of GOP data (170). A formatter (210) formats the data in such a way that the GOP data and auxiliary data including the jump address (290) corresponding to the GOP data are adjacent to each other. An optical recording head (330) receives the formatted data through a recording signal processor (310) and records the received data on an optical disk. Therefore, the data can be recorded on a recording medium with a nearly constant reproduction magnification (R) even when the number of pictures constituting the GOP data varies.

Description

DEVICE FOR RECORDING DB INFORMATION DB IMAGE AND METHOD FOR RECORDING DB INFORMATION DB IMAGE TECHNICAL FIELD The present invention relates to an apparatus for recording image information and to a method for recording image information, for recording a video signal in a recording medium such as an optical disk, and more particularly it relates to a apparatus for recording image information and a method for recording image information, for reproducing with trick play at constant speed or scale factor. PREVIOUS TECHNIQUE As the digital storage means have been developed, it has become necessary to record a long-lasting movie on said recording media. In addition, it has also become convenient to transmit a large number of moving images in the fields of communications, broadcasting and the like. In order to achieve these purposes, highly efficient coding technologies have been examined. In the International Organization for Standardization (ISO), standardization activities are now carried out with respect to various methods for coding a moving image by the MPEG (Moving Picture Experts Group = »Group of Experts of Images in Motion) of the International Electro-Technical Commission (IEC) An international standard for moving images includes, for example, "ISO / IEC 13818." According to an MPEG coding method, a In order to reduce the redundancy in the direction of the time axis at the beginning, a movement compensation is made, thus obtaining a difference between images, and then in order to reduce the redundancy in the direction of the space axis, a DCT ( Discrete Cosine Transform = Discrete Cosine Transformation) a variable length coding and encoding are performed. image called "GOP (Group Of Pictures)" composed of a plurality of images is provided. In each GOP, an image to be encoded first is encoded intra-image. In the following description, an "image" is considered meaning a frame in a frame mode and a field in a field mode, in compliance with an MPEG. In this specification, a so-called "frame rate" (ie the number of images per second) is set to 30. However, it is not limited to it. For example, in the NTSC (National Television System Committee) standard it is 29.97, and in the PAL standard (Phase Alternation Line) it is 25. (A) and (B) of Figure 11 are diagrams respectively showing the GOPs formats. In general, each GOP consists of three types of encoded images: an intra-encoded image (which will simply be referred to as an "I image"); an inter-image predictive coded image (which will simply be referred to as a "P image"); and a bidirectionally inter-image predictive encoded image (which will simply be referred to as the "B-image"). An I image is an image for performing an intfa-images encoding without reference to other images; an image P is an image for performing an inter-image coding with reference to an image I or another image P temporarily anterior likewise; and an image B is an image for performing predictive coding with reference to image (s) I or image (s) P in both directions or temporally before and after itself. The predictive coding of inter-image advance and inter-image bidirectional predictive coding are generically referred to as "inter-image coding". In the example of Figure 11, the second GOP (ie, a GOP having a GOP number of 2) is composed of 12 images and P images are inserted every two images. When decoding, an I image can be reproduced without reference to other images. An image P is decoded inter-images with reference to an I image or another image P temporarily preceding itself. Agree with this, when decoding the I image or another P image temporarily prior to itself, it is required to have been decoded. An image B is encoded using image (s) I or image (s) P in both directions or temporarily before or after itself. Accordingly, when decoding, the B-image can not be decoded unless the I-images or the P-images, which are temporarily before or after themselves, and have to be used for the projection, have been decoded. Therefore, compression coding is performed in the order illustrated in Figure 11. Data that has been encoded by compression in this manner is recorded in a recording medium in the following manner. First, the data encoded by intra-image compression (the image data I) and the data encoded by inter-image compression (image data P or the image data B) are arranged in a form with time sequence and various types of code are added to them, in this way integrating them in some data. Then, the data is divided into a plurality of sectors, each of which has a constant capacity. An address is provided for each of the divided sectors and the sectors are recorded in the recording medium. In the case of reproducing information of images that have been graded in the recording medium by the method described above, the reproduction is carried out while the directions of the respective sectors are identified. In a high-speed reproduction according to the prior art, an I-image is played once by a constant number of GOP (s). In this method, the number of images that make up a GOP is considered constant. In this case, images I that are reproduced at high speed, are images that will be reproduced at regular intervals of time in a normal reproduction. Considering that two adjacent images reproduced in a time interval Th in high-speed reproduction are reproduced at a time interval Tn in normal reproduction, the factor for reproduction scale R can be defined by the equation: R «Tn / Th. Therefore, in the prior art, if the number of images constituting a GOP is constant, then the reproduction scale factor R also becomes constant.

Figure 12 is a diagram to illustrate the reproduction scale factor R used for a case where an image, including GOPs composed of a variable number of images, is reproduced at high speed by the prior art. Figure 12 shows a high-speed reproduction in which an I image is played once for every two GOPs. In a normal reproduction, two successive images are considered reproduced at a range of 1/30 (s). In (A), in Figure 12, an image where a GOP includes 15 images is illustrated. In the case of (A) in Figure 12, the time interval Tn is Tn = 15 x 2/30 = 1 (s), while the time interval Th is Th = 1/30 (s). According to this, the factor for reproduction scale is R = 30. In other words, a normally reproducible image has been compressed on the time axis by 30. Considering the same intervals, in the case of (B) in the Figure 12, the reproduction scale factor R = Tn / Th »(io x 2/30) / (1/30) = 20. In these cases of (C) and (D) in Figure 12, the scale factors of reproduction R become 10 and 8, respectively. As described above, in the case where the number of images constituting a GOP is varied, the reproduction scale factor R is also varied.

The prior art, however, has not given consideration to the fact that when the number of images per GOP is varied, the reproduction scale factor R is also varied. The present invention has been developed in view of the variation of the reproduction scale factor R according to the variation of the number of images by GOP and has an aim of providing an apparatus and method for recording image information without varying the factor of scale of reproduction in a reproduction with artifice. ESC I TION pg t I VENCIÓ The apparatus for recording image information of the present invention includes: an encoder, to generate a plurality of group data, each of the plurality of group data includes at least intra-image data. encoded, upon receiving and encoding a plurality of image data, each of the plurality of image data corresponds to an image; a sector address generator for generating a sector address indicating a higher sector among a plurality of sectors in a recording medium, wherein auxiliary data corresponding to each of the plurality of group data is recorded; a jump address generator for outputting, as a group data hopping direction between the plurality of group data, a higher sector address among a plurality of auxiliary data sector addresses, the auxiliary data is located immediately preceding the second group data, including second image data that is reproduced normally at a later second time than a first time for a predetermined fixed time period, the first time is a time when the first image data located at the upper part of first group data are reproduced in normal reproduction; and a recorder in the recording medium, to record the first group data and the auxiliary data including the jump addresses corresponding to the first group data in such a way that the auxiliary data including the jump address of the first data of group are located adjacent to the first group data in the recording medium. In a modality, considering that the first time and the second time are denoted by TI and T2, respectively and that a positive value ATi (where i = 1 an, eiyn are natural numbers) are used, a first equation: n T2 = TI + ?? Ti il is satisfied and the auxiliary data includes the n types of jump directions corresponding to the second time determined by the first equation. In a modality, considering that the first time and the second time are denoted by TI and T2 respectively, and that a positive value? Ti (where i = 1 a n, and i and n are natural numbers) is used, a second equation: n T2 «Ti • ?? Ti i»? it is satisfied, and the auxiliary data also includes the n types of jump directions corresponding to the second time determined by the second equation. In one modality, the positive value Ti increases monotonically for the natural number i. In one embodiment, the auxiliary data including the hop directions are recorded in the recording medium, such that the intra-encoded image data is reproduced at a time interval in the range of 0.4 (s) to 1.0 ( s), both inclusive, in normal reproduction, the intra-encoded image data are recorded adjacent to the plurality of sectors where the auxiliary data including the hop directions are recorded.

In one embodiment, the natural number n satisfies l < n < nmax (where nmax is a natural number) and nmax 5. In a modality, the auxiliary data that includes the jump addresses include displacement data that correspond to a difference between a third time and the second time, the third time is a time when the third image data, located in the upper sector of the second image data, is reproduced in normal reproduction. In one embodiment, the displacement data represents an interval between the second time and the third time. In one embodiment, the displacement data represents a difference between an image number of an image represented by the second image data and the image number of an image represented by the third image data. The method for recording image information of the present invention includes the steps of: generating a plurality of group data, each in the plurality of group data include at least intra-encoded image data, upon receiving and encoding a plurality of image data, each of the plurality of image data correspond to an image; generating a sector address indicating a higher sector among a plurality of sectors in a recording medium where auxiliary data correspond to each of a plurality of group data being recorded; sending out, as a jump address of the first group data between the plurality of group data, a higher sector address among a plurality of auxiliary data sector addresses, the auxiliary data is located immediately preceding the second group data including the second image data that is reproduced in a normal reproduction at a later second time than a first time, for a predetermined fixed period of time, the first time is a time when the first image data located in a part Top of the first group data are reproduced in normal reproduction; and recording in the recording medium the first group data and the auxiliary data including the hop address corresponding to the first group data, such that the auxiliary data including the hop address of the first group data, is they locate adjacent to the first group data in the recording medium. According to the present invention, using the above-described configurations, a higher sector address among a plurality of sector addresses in which the auxiliary data of a successive GOP is recorded, is recorded in the recording medium as a hop address between the auxiliary data of a preceding GOP. As a result, the linearity in the time axis during reproduction is improved. Furthermore, in one embodiment, a parameter corresponding to a difference between a destination image and a successive image is recorded in the recording medium as displaced data for the auxiliary data of a preceding GOP. As a result, accurate search can be performed during playback. BRIEF DESCRIPTION DB THE DRAWINGS (A) and (D) of Figure 1 are diagrams illustrating a high-speed reproduction operation of the image information that has been recorded according to the first example of the apparatus and method for recording information of the present invention. Figure 2 is a diagram that schematically illustrates the data recorded on a recording medium, according to the first example of the apparatus and method of recording image information of the present invention. Figure 3 is a flowchart of the method of recording image information of the present invention.

Figure 4 is a flow chart illustrating a method for obtaining hop directions based on the table. (A) and (B) of Figure 5 are diagrams for illustrating the hop directions in the first example of the apparatus and method for recording image information of the present invention. Figure 6 is a diagram showing a format for a jump address JA corresponding to plural reproduction scale factors. Figure 7 is a block diagram of the first example of the apparatus for recording image information of the present invention. (A) and (D) of Figure 8 are timing diagrams showing the respective data in Figure 7. Figure 9 is a diagram showing a format in which the hop directions corresponding to a plurality of factors of Playback scale and displacement data corresponding to the respective jump directions are recorded. Figure 10 is a block diagram of a reproduction apparatus for an optical disc in which the image information has been recorded by the apparatus and method for recording image information of the present invention. (A) and (B) of Figure ll are diagrams showing the respective GOP formats. (A) to (D) of Figure 12 are diagrams to illustrate the reproduction scale factor employed for a case where an image, including GOPs composed of a number or variable of images, is reproduced at high speed in accordance with the previous technique M- &IOR MODE FOR CARRYING OUT THE INVENTION Next, the examples of the present invention will be described with reference to the accompanying drawings. It is noted that the same reference number denotes the same component. In addition, a term "image data" for example refers to "data representing an image" for simplicity. The same is true of terms such as "GOP data". (Example 1) In the following examples, a GOP defined in compliance with the MPEG2 standard (or the above-mentioned international standard ISO / IEC 13818) will be sent as the GOP. In this specification, an "image" is considered to mean a frame when the MPEG2 for a frame mode is used and it means a field when that one is used for a field mode. In other words, the present invention is applicable to both a case where a frame is used as an image and a case where a field is used as an image. In this specification, two successive images are considered reproduced at a range of 1/30 (s) (or an image rate is considered to be 30) in normal reproduction. However, the image speed is not limited to this value, but it can be 29.97 or 25, for example. In high-speed playback, the interval between images to be reproduced is equal to that of normal reproduction, ie 1/30 (s). However, in high-speed playback, not all images are reproduced but some images are skipped (do not reproduce). For example, if the reproduction scale factor is 30, then after the first image is reproduced, the second to the thirtyth images are not reproduced and the thirty-one image is reproduced. The interval between the time when the first image is reproduced and the time when the thirty-first image is reproduced is equal to the interval in normal reproduction, ie 1/30 (s). Next, the above image of the two adjacent images reproduced in the high-speed reproduction will be referred to as a "preceding image", while the image to be reproduced immediately after the preceding image is reproduced will be referred to as a "successive image". Also, the respective times when a preceding image and a successive image are reproduced in normal reproduction will be referred to as a "preceding image time" and a "successive image time", respectively. In the example described above, where the reproduction scale factor R is 30, the first image is a preceding image and the thirty-first image is a successive image. Also, if the reproduction scale factor R is 30, the interval between a preceding image time and a successive image time is i (s). That is, since the image to be reproduced at a range of i (s) in normal reproduction reproduces a range of 1/30 (s), the reproduction scale factor R becomes 30. In the present invention, for reasons of simplicity, the time required for a jump operation (specifically, the movement of an optical pickup on an optical disc, tracking and the like) that occurs between the reproduction of a preceding image and the reproduction of a successive image in the reproduction at high speed, it is considered zero. High-speed playback includes high-speed forward playback and high-speed rewind playback. A high-speed advance reproduction refers to a high-speed reproduction wherein a supersive image time is later than a preceding image time. On the other hand, a high-speed rewind reproduction refers to high-speed reproduction where a successive picture time is earlier than a preceding picture time. Figure 1 is a diagram illustrating a high-speed reproduction operation for the image information that has been recorded according to the first example of the apparatus and method for recording image information of the present invention. In this case, a state where the reproduction scale factor R is a constant value of 30, is considered ideal. In other words, it is considered ideal to adjust the interval between a preceding image time and a successive image time to l (s). In (A) to (D) of Figure 1, the numbers assigned sequentially from the top (or sequentially from left to right on the time axis) indicate the respective image positions in a GOP. The number of images included in the GOP (group of images) (the number will then be referred to simply as a "GOP image number") is 15, 10, 5 or 4. In addition, a 1 image that is played back normally at a time t = 0 (s) is considered as a preceding image. In (A) through (D) in Figure 1, the images in the periods indicated by the arrows with solid lines are reproduced, but the images in the periods indicated by the arrows with dotted lines are not reproduced. For reasons of simplicity, it is considered that the images indicated by the arrow with dotted lines are instantly skipped after a preceding image has been reproduced. In this specification, the description will be made while it is considered that the upper image of a GOP on the time axis is an I image before an encoding, for reasons of simplicity. However, the upper GOP image on the time axis is not limited to them, but it can also be a B image or a P image. Also, a GOP can be composed of I images and P images without any images B, or may be composed only of I images. In any of the cases (A) to (C) in Figure 1, the interval between a preceding image time and a successive image time is 1.0 (s) and the reproduction scale factor R is 30. In the case (D) in Figure 1, in order to adjust the interval between the preceding image time and the successive image time l (s), when the preceding image is located at time t = 0, the successive image must be an image 3 of GOP8. However, it is required to start playback with the upper image of a GOP that is an intra-coded image. Therefore, in the first example in that case, it is considered that the image l of G0P8 is reproduced instead of the image 3 of the G0P8 immediately after the preceding image or the image l of GOPl has been reproduced. An image that should be a successive image to achieve a constant reproduction scale factor R (for example, image 3 of GOP8 in the example described above) will be referred to as a "destination image". On the other hand, an image that is currently reproduced as the successive image (for example the image 1 of GOP8 in the example described above) will be referred to as a "successive image". In cases (A) to (C) in Figure 1, the target images are in agreement with the successive images. In case (D) in Figure 1, the destination image (image 3 of GOP8) is different from the successive image (image 1 of GOP8), the interval between the preceding image and the successive image is 28/30 (s) and the reproduction scale factor R is 28. To summarize the above description, a successive image may be represented as the upper image of a GOP including a destination image when reproducing the recorded image information according to the present invention. . Next, respective GOPs including a preceding image and a successive image will be referred to as a "preceding GOP" and a "successive GOP", respectively. A destination image is also included in a successive GOP. A "top image of a GOP" to which a plurality of images belong, refers to an image represented by the image data that is first decoded in normal reproduction among the image data recorded as GOP data. According to MPEGl and MPEG2 to which the present invention is applied, the upper image of the GOP data is the image data I on an optical disk. In this specification, the preceding image is a superior image of a GOP (i.e., an I image). If the image information recorded by the apparatus and method of the invention is reproduced, even if a high-speed reproduction is performed, the interval between a preceding image time and a successive image time becomes substantially regular (i.e. the factor of reproduction scale R becomes substantially constant) as illustrated in (A) to (D) in Figure 1, unlike the example of the prior art illustrated in Figure 12. An unnatural image shaken to be generated in a reproduction High speed when the number of images included in a GOP is variable, it can be eliminated when using the apparatus and / or the method of the present invention (or by adjusting the reproduction scale factor R which is substantially constant). In this specification, the degree to which the reproduction scale factor R is constant in high-speed reproduction will be referred to as a "linearity in time axis". For example, linearity in time axis may be considered as fully maintained in (A) to (C) in Figure 1. Figure 2 is a diagram schematically illustrating the data recorded in a recording medium according to the first example and the second example which will be described later of the apparatus for recording image information and recording method of the present invention. In the following examples, a DVD (digital versatile disc), one of optical discs, is used as the medium on which the image data is recorded. The data has been recorded on tracks formed spirally on an optical disc. When a motor is rotated by the optical disc, an optical head is moved to read the recorded data with respect to the tracks. In Figure 2, the optical head moves from left to right in normal reproduction. It is noted that the disk rotation is controlled by constant linear velocity CLV (constant linear velocity) and the linear velocity is approximately 4 m / s.

As illustrated in Figure 2, GOP data (denoted by GOP1 and GOP2) and ancillary data (denoted by AUXl and AUX2) are recorded on a sector basis. The sectors are obtained by dividing a part of the tracks on the optical disk, and an access area,? N information area for file management and a data area are arranged in this order from the peripheral peripheral side to the peripheral side outside of the optical disc. The GOP data and the auxiliary data to be described in detail later are recorded in the data area. The numbers assigned to the respective sectors are called "sector addresses" (denoted by SA in Figure 2) and are integers represented by the data of 4 octets (bytes). An SA sector address is included in a sub-code (denoted by SC in Figure 2) having a data length of 16 octets (bytes). In the 16 octet area of the subcode other than the four octet area of the SA sector address, information necessary to control a disk, an error correction code for the subcode and the like are recorded. The SC subcode (16 octets (bytes)) and the DA data area (2048 bytes) are recorded in each sector. As illustrated in Figure 2, the SC sub-code is recorded in the recording medium to be located immediately before the region where the DA data area has been recorded. The "previous" address indicated by "previous immediately", "precedence" and the like in this specification, refer to an address in which the reading of the data is temporarily precedent in normal reproduction (ie the optical head reaches the data in precedence). For example, when the data A is "before" the data B, the data A is read before the data B is read from the optical disk in the normal reproduction mode. Both the GOP data and the auxiliary data corresponding to them are recorded in the region of the DA data area in each sector. When the data consisting of the SC sub-code and the DA data area in each sector are currently recorded in the recording medium, an ECC (error correction code) is added to the data having 2064 bytes (ie 16 bytes of the sub-code and 2048 octets of the DA data area) by sector, and then the data is recorded. Figure 2 shows a detailed format for sectors 0 to 2 only. However, all GOP data and auxiliary data are recorded as the DA data area. It is considered that a sector address starts with zero for convenience of description. GOP data GOP1 illustrated in Figure 2 include intra-coded image data (image data I) and inter-coded image data (image data P and / or image data B). The image data I of the GOP data GOP1 is included in sectors 2 to 4 illustrated in Figure 2. In G0P1, the image data P Pl to P4 and the image data B Bl to B8 are included in sectors 4 a 14. A border between adjacent image data does not always align with the boundary between sectors. In the region of sector 14 where the image data P P4 is not recorded, it is filled with padding octets so-called S. As a result, the end of the GOP data G0P1 is aligned with the sector end (sector 14 in the Figure 2). The end of the GOP data always aligns with the end of a sector. At the top of the GOP data, the image data I is recorded. Auxiliary AUX data is recorded in the two sectors (for example, sectors 0 and l in Figure 2) immediately preceding the GOP data on the optical disk. The AUX auxiliary data is data other than the image data (image data I, image data P and image data B) and includes at least one jump address JA, but may also include other types of data except for the data of image. In this specification, the description will be made while it is considered that the auxiliary data AüX includes the hop address (for example sector 0 in Figure 2) and VBI video bleaching information (for example sector l in Figure 2). Nevertheless, does not mean that the auxiliary data does not include that the VBI video bleaching information is excluded from the applications of the present invention. In addition, auxiliary AUX data can also be recorded in either one sector or three or more sectors. The VBI video bleaching information is a signal output during a vertical trace repetition interval of a video signal and includes a signal for closed captioning, a signal for copy generation administration and the like. The jump address JA recorded in sector 0 indicates that a higher sector address of the AUX auxiliary data is located immediately preceding the successive GOP data. For example, when the successive image is an I image that will be recorded from sector 17 onwards, the successive GOP is G P2 and the jump direction JA of the preceding image is "15". As described above, sets of the coded image data and its associated data (i.e. the hop address JA and the VBI video bleach information), each set consists of GOP data and auxiliary data that are located immediately before the GOP data and correspond to the GOP data, are recorded in the tracks. In other words, sectors where the GOP data has been recorded and the sectors in which the auxiliary data correspond to the GOP data have been recorded, are adjacent to each other in precedence to the GOP data. Although, in a current recording medium a sub-code is located between the GOP data and the auxiliary data, this positional relationship is also referred to as "adjacent" in this specification. Other data is sometimes added to the jump address JA and the VBI video bleaching information but each of these data is recorded within a single sector. In addition, the start and end of each GOP data can be aligned with corresponding boundaries of the sectors. It is noted that Figure 2 schematically shows a structure in which the data is recorded in the respective sectors and that the length of the data is variable depending on the original image and the Coding method. GOP1 illustrated in Figure 2 is composed of I images, P images and B images. However, it is not limited thereto but GOP can also be composed of I images, and P images or only i images. That is, the GOP data includes at least intra-encoded image data (or the image data I). In addition, the number of images that constitute GOP can be increased or decreased appropriately. For example, if totally different images appear image by image, then adverse effects caused by the prediction error due to inter-image coding can be avoided when composing the GOP of I images only. On the other hand, in the case of increasing the entry points used for the jump operation during playback, it is only necessary to compose GOP from a smaller number of images. Figure 3 is a flowchart of the method of recording image information of the present invention. Next, the method of recording image information of the present invention will be described with reference to Figure 3. A common format for a video signal that complies with NTSC or PAL, is employed as a format for a video signal of entry. The input video signal is converted into a plurality of image data, each of which represents an image. The format of this image data is defined to comply with Recommendation BT.601 (originally with Rec. 601 of CCIR) of ITü-R (International Telecommunication Union Radiocommunication Sector = Radiocommunication Sector of the International Telecommunication Union). In step Sl, the image data is grouped into a plurality of GOP data. In the case where each of the GOP data includes a plurality of image data, the plurality of image data included in each of the GOP data represents successive images on the time axis. As described above, the number of images that constitute a GOP can be adjusted to an arbitrary number depending on the type of image, the number of entry points and the reproduction with artifice and the like. A group start code (for example "group__start_code" which has 32 bits defined in MPEGl and MPEG2) indicating the top of the GOP data, is located at the start of each of the GOP data. In step S2, the divided GOPs are compression encoded to include at least the inter-coded image data (image data I). In the case where a GOP includes a plurality of images, the compression speed can be increased by performing inter-image coding instead of intra-image coding depending on the need. In contrast, a case where the GOP data does not include inter-coded image data (P image data and B image data) may also occur. Intra-image coding and inter-image coding are performed by known methods. In the following description, the encoded GOP data (not the GOP data generated in Step Sl, and yet to be encoded but the GOP data generated in step S2) will simply be referred to as "GOP data".

In step S3, the sector addresses are calculated on the optical disk in which the plurality of GOP data and the auxiliary data corresponding to the respective GOP data are recorded. A sector address is calculated using the length of the GOP data, the length of the auxiliary data and the sector length. More specifically, a counter having an initial value "0" and an increment of "1" are used. First, since the auxiliary data consisting of two sectors are recorded immediately before the GOP data, the count value of the counter is increased from "0" to "2". Next, upon receiving the GOP data, the count value is incremented by "1" each time 2048 octets, i.e. the length of the data area (DA in Figure 2) are fed. When the upper part of the GOP data is detected, the counter is incremented by "2". The sector addresses of the auxiliary data and the GOP data are obtained by this counting operation. In step S4, the GOP numbers of the GOP data generated in step S2 are calculated. More specifically, a counter having an initial value of "l" and an increment of "l" are used. By increasing the account value by "1" each time a GOP data is fed, GOP numbers can be obtained. The feeding of a GOP data can be identified by the group principle code added in step S2. In step S5, the image numbers of the image data included in the GOP data generated in step S2 are calculated. More specifically, each time the start of the next image is detected (or the "picture_start_code" which has 32 bits defined in MPEG1 and MPEG2), the image number is counted from the initial value = 0 by the increment = 1. In Step S6, the time is calculated when each image is reproduced in normal reproduction, based on the number of its image calculated in Step S5. In the first example, the reproduction interval between two images in normal playback is 1/30 (s). Therefore, the product obtained by multiplying "1/30 (s)" with each other and the "image number" becomes equal to the time when image playback starts. In Step S7, a table for generating the hop directions is generated using the GOP numbers, the image numbers, the image reproduction times, the sector addresses and the upper directions of the auxiliary data that have been calculated in Steps S3 to S6. Table i is a table for generating jump directions.

TABLE 1 Number Number Time Direction Direction Type GOP image of Secondary Player of the data transmission Image Aux. 1 0 0.0000 2-30 0 Previous 1 1 0.0333 31-33 0 1 2 0.0666 34-36 0 1 3 0.1000 37-51 0 1 4 0.1333 52-54 0 1 5 0.1666 55-57 0 1 6 0.2000 58-72 0 1 7 0.2333 73-75 0 1 8 0.2666 76-78 0 1 9 0.3000 79-93 0 1 10 0.3333 94-96 0 1 11 0.3666 97-99 0 2 12 0.4000 102-130 100 2 13 0.4333 131-133 100 2 14 0.4666 134-136 100 2 15 0.5000 137-151 100 2 16 0.5333 152-154 100 2 17 0.5666 155-157 100 3 18 0.6000 160-190 158 Successive 3 19 0.6333 191-193 158 TABLE 1 (Cont.) Number Number Time Direction Direction Type GOP image of Secondary Player of the data transmission Image A? X, 3 29 0.9666 257-259 158 3 30 1.0000 260-274 158 Destination 3 31 1.0333 275-277 158 It is noted that the "image type" column is provided for Table 1 for description convenience and is not necessary to generate the jump addresses. In Table 1, GOP data GOP1 (or GOP data having a GOP number of "1") composed of 12 image data (image 0 to image 11), for example. Normal playback of each of the image data starts at a range of 1/30 (s). Auxiliary data corresponding to two sectors are recorded immediately before each of the GOP data. Accordingly, the sectors where the GOP GOP1 data is recorded start from the sector address of "2". Auxiliary data corresponding to two sectors are also inserted between the GOP data GOP1 and the GOP2 data. Thus, the difference between the sector address and the end of the GOP data GOP1 (ie, 99) and the sector address at the start of the GOP data G0P2 (ie, 102) becomes 3. In Step S8, the Jump addresses are obtained based on the table reproduced in Step S7. Next, a method to obtain the hop directions will be described. Here, considering that the reproduction scale factor R is 30 and the preceding image is an image that has an image number of "0" (its reproduction time = - 0.0000 (s)), the image's reproduction time Destination (then simply referred to as a "target image time") becomes 1.0000 (s) in normal playback. A successive image is the upper image of a GOP in which the destination image is included (ie a successive GOP) it does not matter whether the destination image is the upper image of the GOP or not. Figure 4 is a flow diagram illustrating a method for obtaining the directions of jump of the table. Next, description will be made with reference to Figure 4 and Table i. In Step S81, an image number is given for the preceding image. Here, the 0 image included in GOPl is considered the preceding image. In Step S82, the reproduction time of the preceding image is obtained using the table. Aguí, "a preceding image time = 0.0000 (s)" is obtained by reference to the reproduction time column of image 0. In Step S83, the interval between the preceding image time and the destination image time is given based on the reproduction scale factor R. Here, the reproduction scale factor R is considered to be 30. Therefore, (the interval between the preceding image time and the destination image time) = ( the interval of reproduction time between images) x (the reproduction scale factor R) = (1/30) x 30 = l (s). In step S84, the reproduction time of the destination image is calculated. (The target image time) = (the preceding image time) + (the interval between the preceding image time and the destination image time) = 0.0000 + 1.0000 = 1.0000 (s). In step S85, an image number is obtained for the destination image using the destination image time (1.0000 (s)). The image number can be obtained by sequentially scanning the playback time column from the image number 0 to find an image number from which the playback time becomes equal to or greater than the target image time of 1.0000 (s) for the first time in Table l. In the example illustrated in Table 1, this image number is "30".

In step S86, a GOP number is obtained for the Successive GOP (or the GOP where the destination image or image 30 is included). With reference to the column of the GOP number of the image 30, it is found that the GOP number is 3. In step S87, the successive image (or the upper image of the successive GOP) is obtained. The successive image can be obtained by sequentially scanning the column of the GOP number from the GOP number l in Table l, to find an image number from which the GOP number becomes equal to the GOP number 3 for the first time. In the example illustrated in Table 1, this image number is 18. In Step S88, the upper direction is obtained for the auxiliary data corresponding to the successive GOP in which the successive image is included by reference to Table 1. With reference to the column "upper direction of the auxiliary data" in the row of the image 18 or the successive image in Table i, the upper direction of the auxiliary data corresponding to the successive GOP is found to be 158. This value of 158 is recorded in the sector direction 0 as the jump direction of the image 0 or the preceding image, when the reproduction scale factor R is 30 (ie the interval between the preceding image time and the image time of the image). destiny is (s)). This sector address 0 is the sector address in which the hop address of the auxiliary data corresponding to the GOPl data or the preceding GOP is recorded. Figure 3 will refer again. In the Stage S9, formatting is performed in such a way that the auxiliary data including the hop address generated in Step S8 and the corresponding GOP data are adjacent to each other in the recording medium, thus sending out the data thus obtained as a current of recording data. Again with reference to Figure 2, it will be specifically described. The leap direction generated upon performing the formatting in Step S9 is placed in the DA data area 0 sector (JAI), for example. In this specification, "auxiliary data" refers to data recorded in sectors other than sectors where GOP data is included (for example, sectors 2 to 14 and 17 in Figure 2), that is, data recorded in the sectors (for example sectors 0 and 1 of Figure 2) adjacent to and preceding the sectors in which the GOP data is recorded. In the same way as the GOP data, the hop address included in the auxiliary data is also recorded in the DA data area (2048 bytes) in a sector.

The auxiliary data is placed in order to be adjacent to the top of each of the GOP data. Therefore, in the "upper auxiliary data address" column in Table i, the upper sector addresses of the sectors, where the auxiliary data corresponding to the respective GOP data is illustrated, is recorded. In Step SlO, the recording data stream generated in Step S9 is subjected to various types of processing, such as the direction of an error correction signal, and a digital modulation, thereby generating a recording signal. As an error correction method, an RS-PC method is used (Reed-Solomon Product Code). As a method of modulation, a modulation of eight to sixteen points is employed. In Step Sil, by supplying the recording signal obtained in the SIO Step to an optical writing head, the recording data stream is written to the tracks on the optical disc. In the above description, all stages are processed sequentially. However, processing is not limited to that way. For example, Steps S4 and S5 can be processed in parallel. In addition, the order of the respective steps is not limited to that illustrated. For example, the order of processing of Steps S3 to S5 is interchangeable. Figure 5 is a diagram for illustrating the hop directions in the first example of the apparatus and method for recording image information of the present invention. High-speed reproduction is considered to be performed using the table illustrated in Table i both in (A) and (B) in Figure 5. In (A) of Figure 5, the data to be recorded in the sectors on the optical disk are illustrated schematically. The GOP, GOPl data includes the intra-coded image data II and the inter-coded image data PBl. The inter-coded image data PB1 include the image data P and / or the image data B. That is, the inter-coded image data PB1 corresponding to "Bl, B2, Pl, B3, B3, P2, .... P4, S "illustrated in Figure 2. However, the GOP data is not limited thereto, but may be composed of intra-coded image data without any inter-coded image data. AUXl auxiliary data, located immediately before the GOP data, GOPl, includes a JAV jump address and VBI1 video bleach information. The jump address JAI is located in the sector address 0 that is before the upper sector of the GOPl data by two sectors. Auxiliary data AUXl corresponds to GOP data, GOPl. Auxiliary data AUXl indicates the upper sector address of the auxiliary data corresponding to the GOP data in which the destination image data is included. More specifically, if the image 0 or the upper image of GOP1 is considered the image that is the preceding image as described with reference to Table i and the reproduction scale factor R is considered 30, then it is necessary to reproduce an image in reproduction normal 1 (s) after the time when the image 0 or the preceding image is played. That is, an image reproduced in normal mode at the destination image time t2, which is 1 (s) later than the preceding image time ti is the destination image. Here, the destination image is the image 30. The successive image is the upper image of GOP3 where the destination image 30 is included, ie the image 18. Therefore, in the high-speed reproduction in which the reproduction scale factor R = 30, the image 18 or the successive image is reproduced in succession with the image 0 or the preceding image. The image 18 or the successive image is reproduced at a time t3 in normal reproduction.

The jump address JAI corresponding to the GOP data GOP1 indicates the upper sector address of the auxiliary data corresponding to the GOP data in which the destination image is included. As illustrated in (A) in Figure 5, 158 or the upper sector address of the auxiliary data AUX3 corresponding to GOP3 or the successive GOP, they are recorded in the jump direction JAI corresponding to the data GOP, GOPl. Ideally, the reproduction should start from the image 30 or the destination image. However, in the first example, the image 18 or the successive image is reproduced by reading the successive GOP3 or GOP data from its upper part. As a result, it is possible to advantageously simplify the hardware and software (software) to perform the high-speed reproduction of the first example. It is noted that, in a current reproduction apparatus, it is impossible to predict when a high-speed playback command is given by a user to a reproduction apparatus. Therefore, a high-speed reproduction by a user can be instructed when the image 3 illustrated in (B) in Figure 5 is reproduced, for example. However, in the first and second examples, the preceding image is considered to be nothing more than the upper image of a preceding GOP (e.g., an image 0, 12 or 18 illustrated in (B) in Figure 5). Therefore, the preceding image time is set to time ti when the upper image of a preceding GOP is reproduced normally. In the case of making the reproduction scale factor R for high-speed reproduction achievable, it is necessary to record the jump directions corresponding to the respective reproduction scale factors R. For example, in order to realize the reproduction scale factors R = ± 15, ± 30, ± 75 and ± 300, it is necessary to record eight types of jump direction in total. Here, the "+" and "-" signs of the reproduction scale factors R indicate a forward direction and a reverse direction, respectively. Figure 6 is a diagram illustrating a format for the sector including hop directions JA corresponding to a plurality of reproduction scale factors R. The SC sub-code, the hop directions JA and the extra ED data illustrated in the Figure 6 correspond to sector 0 (JAI) illustrated in Figure 2, for example. The hop directions JA and the extra data ED illustrated in Figure 6 are recorded in the DA data area (2048 bytes) illustrated in Figure 2. The jump addresses JA employed in the first example include the addresses FWD60, FWD30, FWD10, FWD7.5, FWD5, FWD2, F D2.5, FWD1.5, F D1, .... BWD7.5, BWD10, BWD30 and BWD60 (each of which has 4 bytes) and the extra ED data (1968 octets) in this order from its top. In these directions, the reference sign "FWD" indicates a high-speed forward reproduction, while the reference sign "BWD" indicates a high-speed rewind reproduction. The number that follows "FWD" or "BWD" indicates the interval between the preceding image time and the destination image time. For example, "FWD10" in Figure 6 indicates that the upper sector address of the auxiliary data corresponding to the GOP including the destination image that is normally played ten seconds after the preceding image time in the high-speed forward reproduction . In addition, various data types, such as a time when GOP playback is started and a sector address in which audio data corresponding to the GOP data is recorded, can be recorded as the extra ED data. Whereas a time when a preceding image is normally reproduced, is denoted by Ti and a time when a destination image is reproduced normally, is denoted by T2 and a positive value? (where i = l a n and i and n are natural numbers) is used, the time T2 in the case illustrated in Figure 6 can be represented as: n T2 = TI + ?? Ti i = l where "S." indicates a sum for i = 1 to n, and l < n < nmax (where nmax is a natural number). In Figure 6, nmax = 10, TI at T5 = 0.5 (s), T6 at T8 = 2.5 (s),? T9 = 20 and ? T10 = 30. That is, in the case illustrated in Figure 6, Ti is monotonically increased for the variable i. • You either stay the same or increase when the variable i increases. As a result, it is possible to advantageously perform reproduction scale factors R over a wide range while saving the region in which the jump address is recorded. In general, the accuracy with respect to a high-speed reproduction is required to be high at the time of a low speed. However, the higher the speed, the lower the pressure required. Accordingly, in the case where the reproduction scale factor R is small, or the case where the jumping distance (ie the interval between the preceding image time and the destination image time) is temporarily short, the number of types of jump directions, preferably is larger. Conversely, in the case when the reproduction scale factor R is large, the number of hop address types may be equally small. The jump direction table illustrated in Figure 6 includes jumping directions to achieve 10 types of reproduction scale factors R in the forward direction and 10 types of reproduction scale factor R in the reverse direction, i.e. 20 types of reproduction scale factors R in total. However, the skip directions are not limited to the address corresponding to the 20 types of reproduction scale factors R, but may include only the 10 types of skip directions used for high-speed playback in Example previously described. In addition, the interval between the preceding image time and the destination image time is not limited to the values (such as 0.5 (s), 1.0 (s), 1.5 (s), 2.0 (s), and 2.5 (s) ) exemplified above. In the first and second examples, the natural number -pma-x in the above-described equation is preferably equal to or greater than 5. More preferably, the natural number -amax is equal to or greater than 10. Figure 7 is a diagram of blocks of the first example of the apparatus for recording image information of the present invention. Figure 7 shows a configuration for an apparatus that implements the method of recording image information of the invention as described primarily with reference to Figures 3 to 5. A video signal 100 is fed to a smooth A / D converter. . The video signal 100 is a signal having the NTSC or PAL format described above. The A / D converter 110 receives the video signal 100 to convert it into image data 120 represented by binary data. The image data 120 is data representing images that will be displayed at a range of 1/30 (s), for example. More specifically, the image data 120 is data having a format defined by ITU-R Recommendation BT.601. A group splitter 130 receives the image data 120 and is separated by a plurality of groups in such a way that each of the groups includes a predetermined number of images, thus generating GOP 140 data and sending the data to an encoder. 150 and a GOP counter 160. In the case where the GOP data 140 includes a plurality of image data, the plurality of image data included in the GOP data 140 are successive on the time axis. The number of images represented by a GOP 140 data can be adjusted arbitrarily depending on the type of the image, the number of entry points in artifice reproduction and the like. A group start code indicating the top of the GOP data is aggregated at the start of the GOP 140 data that is output from the group splitter 130. The encoder 150 performs compression coding processing on a GOP basis for GOP 140 data, thus sending out the encoded GOP data 170 to a second divider 180. The GOP data 140 is compression encoded to include at least intra-encoded image data (image data I). In the case where the GOP 140 data includes a plurality of image data, the compression rate can be increased by performing inter-image coding instead of intra-image coding depending on the need. In contrast, a case where the encoded GOP data 170 does not include inter-coded image data (P image data and B image data) may also occur. Intra-image coding and inter-image coding are implemented by known methods. The sector divider 180 receives the encoded GOP data 170, thereby calculating the sector addresses on the optical disk in which the GOP data 170 and the auxiliary data corresponding to the respective GOP data 170 are recorded. The sector divider 180 not only outputs the data 190 by indicating the calculated sector addresses to a table generator 200 but also the GOP data 170 to a formatter 210. The sector divider 180 calculates the sector addresses based on the length of GOP data, the length of auxiliary data and the sector length. The sector divider 180 includes a counter having an initial value of "0" and an increment of "l". Since the auxiliary data is recorded immediately before GOP, the sector divider 180 first increments the count value from "0" to "2". Next, the sector divider 180 receives the GOP 170 data and increases the count value by "l" each time of 2048 octets, i.e. the data area length is fed. In performing such an operation, the sector divider 180 generates the data 190 indicating the sector addresses in which the respective GOP data 170 is recorded and the sector addresses in which the auxiliary data corresponding to the respective GOP data is recorded. The sector divider 180 counts in such a way that the two sector addresses are skipped at the boundary between two GOP data, because the auxiliary data is recorded in the two sectors located on the boundary between two adjacent GOP data. The sector divider 180 detects the start of each GOP data by the group start code.

The GOP 160 counter calculates the GOP number of the GOP 140 data to be encoded, thus sending the data 220, indicating the GOP number to the table generator 200. The GOP 160 counter includes a counter having an initial value of " 1"and an increase of" l ". By increasing the count value by "l" each time a GOP data is fed, the GOP 160 counter generates the GOP numbers. The GOP 160 counter detects the feeding of a GOP data when examining the amount of data of the GOP of power. An image number counter 240 calculates the image numbers of the image data 120 included in the GOP data 140, thus sending the data 250 indicating the image numbers. The image number counter 240 includes a counter having an initial value of "0" and an increment of "1". By increasing the count value by "l", each time an image data is fed to it, the image number counter 240 generates the image numbers. The image number counter 240 detects the feeding of an image data by examining the amount of data in the feed image. Although the GOP counter 160 and the image number counter 240 perform an operation of counting or counting based on the amount of data fed, but the operation is not limited thereto, for example, the GOP numbers and the numbers of The image can be counted respectively upon detection of the group start code and the image start code (defined in MPEG and MPEG 2) included in the data output of the encoder 150. A time converter / image number 260 calculates a time when each image is reproduced in the normal reproduction based on the data 250 indicating the image numbers, thus sending the data 270 indicating the time to the table generator 200. Specifically, the reproduction interval between two images in the Normal playback is 1/30 (s) in the first example. Therefore, the time converter / image number 260 outputs the data 270 indicating the product obtained by multiplying "1/30 (s)", ie the time when image reproduction starts, and the "image number" to the table generator 200. The table generator 200 generates a table such as that illustrated in Table 1 based on the data 220 indicating the GOP numbers, the data 250 indicates the image numbers, the data 270 indicates the times or the times When the images are reproduced in normal reproduction and the data 1 ^ 0 indicates the sector addresses of the GOP 170 data, thus storing the table generated in a memory 280. The column of the "upper direction of auxiliary data" in Table i is generated in the following manner. Specifically, the table generator 200 outputs a sector address (for example 158 in GOP3 in Table 1) obtained to the subtractor 2 (corresponding to the number of sectors where the auxiliary data is recorded) from the upper sector address ( for example, a sector address 160 of GOP3 in Table 1) of the sector where each GOP is recorded as the "top address of auxiliary data" for all images (e.g., images having image numbers equal to or greater than 18). in GOP3 in Table l) included in GOP. The table generator 200 performs the steps to obtain the jump direction of the table, as described with reference to Steps S7 and S8 in Figure 3, by means of software (software) sending the hop directions in this way. resulting 290 to formatter 210. Therefore, table generator 200 can typically be implemented as a combination of a microprocessor and associated programs that are stored in a memory 280. Formatter 210 receives GOP 170 data and jump addresses 290 and adds the auxiliary data including the jump addresses 290 to the GOP data 170, thereby sending this data as recording data 300 to a recording signal processor 310. The recording format of the recording data 300 is as shown in FIG. illustrated in Figure 2, for example while the recording format of the sectors including the hop directions 290 between the auxiliary data is as illustrated in Figure 6, for example. That is, the formatter 210 specifies the format such that the auxiliary data, including the corresponding hop address 290, is recorded in the two sectors immediately preceding the GOP data 170. The recording signal processor 310 receives the recording data. 300, subjects the data to various processing types such as the addition of an error correction signal and digital modulation, amplifies the recording signal 320 to a sufficient degree to direct an optical head 330 to record and then output the signal amplified to the optical head for recording 330. The optical head for recording 330 writes the recording data 300 to the tracks on the optical disc by irradiating light having an intensity corresponding to the recording signal 320 on the optical disk. Figure 8 is a timing diagram illustrating data for the respective components illustrated in Figure 7. In Figure 8, (A) to (D) represent the data 220 indicating the GOP numbers, the data 250 indicates the numbers of image, the data 270 indicates the times when the images are reproduced in normal reproduction, and the data 190 indicates the sector addresses of the GOP 170 data, respectively. In (D) in Figure 8, a neighborhood of the boundary between GOP2 and GOP3 is enlarged on the time axis and illustrated. The table generator 200 receives this data, generating a table and then sends the table out to the memory 280. In the first example, the auxiliary data were considered recorded in two sectors. However, the number will not be limited to it, but the data can be recorded in a sector or three or more sectors. In the latter case, it is also preferable that the auxiliary data be recorded immediately before the GOP data. In addition, it is also preferable for a hop address to indicate a higher sector address of the sectors where the auxiliary data corresponding to the successive GOP data is recorded. The hop direction can also be arranged in each of the sectors of the image data i instead of being recorded only in the upper sector of the auxiliary data. In the first example, a case where the auxiliary information is provided for the I image of each GOP, has been illustrated. However, in the case where the number of images included in a GOP is small, for example it is not always necessary to place auxiliary data to correspond to all GOPs. In such a case, it is only necessary to place the auxiliary data in such a way that the times when the images of the respective GOPs having auxiliary data that are first reproduced in the normal mode are at substantially regular intervals. For example, as for the intra-encoded image data to be recorded in the sectors adjacent to the sectors where the auxiliary data including the hop directions are recorded, the auxiliary data preferably are recorded in a format such as to be played back in a range in a range of 0.4 (s) to 1.0 (s), both inclusive in normal reproduction. This advantageously improves the linearity of the time axis when the reproduction scale factor R is small. (Example 2) In the second example of the apparatus and method for recording image information of the present invention, data indicating a difference between the image number of a destination image and the image number of a successive image (below these data will be referred to as "displacement data") together with the jump addresses, recorded on the optical disk as auxiliary data. By using this shift data, playback can be silenced until the time when the destination image is played. As a result, it is possible to exactly look for an image and also improve the linearity in the time axis during high-speed reproduction. In the following explanation, only the different points of the first example will be described. Figures 4 and 5 will refer again. The displacement data are numbers obtained by "abstracting the image number (18) of a successive image from the image number (30) of a target image, ie 30 - 18 = 12 in Figure 5, by example. In the case of recording a plurality of hop directions, the shift data corresponding to the respective addresses are also recorded. In Step S85 illustrated in Figure 4, the image number of a destination image is obtained. In Step S87, the image number of a successive image is obtained. Therefore, a step to calculate (the image number of the destination image) - (the image number of the successive image) is performed as Step S89 after step S88. From Step S89 onwards, the hop directions and the corresponding shift data can be treated as the auxiliary data instead of the hop directions in the first example.

For example in Step S9 illustrated in Figure 3, formatting is performed in such a way that the hop directions and the shift data are recorded within a sector. Figure 9 is a diagram showing a format in which the hop directions JA corresponding to a plurality of reproduction scale factors R and the shift data OD corresponding to the respective hop directions are recorded. In Figure 9, "FOS" and "BOS" indicates the displacement data in a high-speed forward reproduction and a high-speed reverse playback, respectively. The number that follows "FOS" or "BOS" indicates the interval between a preceding image time and a destination image time. For example, the displacement data "FOS10" in Figure 9 indicates the number obtained by subtracting the image number of a successive image from the image number of a destination image has been reproduced normally at a time of 10 seconds after the previous image time, in high-speed forward reproduction. The sub-code SC, the hop address JA, the direction of travel OD and the extra data ED illustrated in Figure 9 correspond to JAI illustrated in Figure 2, for example. The hop address JA, the direction of travel OD and the extra data BD illustrated in Figure 9 are recorded in the DA data area (2048 bytes) illustrated in Figure 2, for example. Figure 7 will refer again. In the second example, the table generator 200 illustrated in Figure 7 performs the calculation of the previously described step S89, thereby generating the shift data. The displacement data generated together with the hop directions 290 illustrated in Figure 7 are outputted to the formatter 210. As illustrated in Figure 9, the formatter 210 specifies the format, such that sub-code SC, the Jump address JA, the OD offset data and the extra ED data are recorded in this order in the upper sector of the auxiliary data. As described earlier in this second example, a number obtained by subtracting the image number of a successive image from the image number of a destination image is recorded as the shift data. For example, in the case illustrated in Table 1, the displacement data "12" is obtained by subtracting the image number "18" from the successive image of the image number "30" of the destination image. This data of offset "12" together with the address value of "158" (the auxiliary data of the auxiliary data corresponding to the successive GOP) is recorded in the sector that has a sector address "0" as the auxiliary data that Correspond to the GOP1 data, where the preceding image (which has an image number 0) is included. However, the displacement data is not limited to the difference previously stated between the image number, but the data corresponds to the difference between the image number of a destination image and the image number of a successive image. For example, data indicating the time interval obtained by subtracting a successive image time from a target image time may also be recorded. For example, in the case illustrated in Table i, by subtracting the successive image time "0.6000 (s)" from the deetino image time "1.0000 (e)", "0.4000" is obtained as displacement data. This displacement data "0.4000" together with the jump address value "158" (the upper direction of the auxiliary data corresponding to the successive GOP) can be recorded in the sector that has a sector address "0" as the corresponding auxiliary data to GOP1 data, where the preceding image (which has an image number 0) is included. It is also preferable to record the displacement data to correspond to all the hop directions. Nevertheless, the correspondence is not limited to it. For example, the displacement data may be recorded to associate with jump addresses having relatively small reproduction stage factors R. Although each of the displacement data illustrated in Figure 9 have 4 octetoe, the data length is not limited thereto. Especially, in the case where the difference between a destination image number and a successive image number is recorded as the displacement data, the displacement data may only have one octet, for example. Next, the reproduction of the image information that has been recorded according to the second example will be described. In the first example, in the case where a destination image is different from a successive image in the high-speed reproduction, the evasive image is reproduced immediately after the reproduction of the destination image. On the other hand, in this second example, the displacement data recorded in the recording medium can be used during playback, unlike the first example. By silencing the reproduction of eolo images for a period corresponding to the shift data, the destination image can be reproduced immediately after the reproduction of the preceding image without reproducing the image euceeiva. As a result, the image of deetino is always reproduced immediately after the previous image is reproduced, so that any image demanded by a user can be sought advantageously and directly. Figure 10 shows a block diagram of a reproduction apparatus for an optical disc in which image information has been recorded by the apparatus and method for recording image information of the present invention. This image information reproducing apparatus reproduces the image-encoded information that has been recorded in a recording medium such as an optical disc by the apparatus and method for recording image information information in the first example described above. In the following description, the recording medium will be considered to be an optical die. Alternatively, any other type of recording medium can also be used. In Figure 10, 1001 denotes an optical disk; 1002 denotes an optical reader; 1003 denotes a driver circuit of the optical reader; 1004 denotes a reproduced signal processor circuit; 1005 denotes a buffer; 1006 denotes an auxiliary data extractor; 1007 denotes a control circuit; and 1008 denotes a decoder. Next, your operation will be described.

During reproduction, a signal reproduced from the optical disk 1001 by the optical reader 1002 is supplied to the reproduced signal processor circuit 1004. Various types of processing such as digitalization, digital modulation and error correction are performed in the reproduced signal processor circuit 1004 The data output from the reproduced signal processor 1004 is transmitted to the auxiliary data extractor 1006 and the buffer 1005. The auxiliary data is obtained in the auxiliary data extractor 1006. The auxiliary data output from the auxiliary data extractor 1006 it is transmitted to the control circuit 1007, thereby controlling the optical pickup controller circuit 1003. The output of the buffer 1005 is transmitted to and processed by the decoder 1008 in such a manner that image data 1009 is outputted. of the reproduction apparatus illustrated in Figure 10 when reproducing aa The speed at a constant reproduction scale factor R, will be described below. Considering a GOP currently recovered is a preceding GOP, the auxiliary data corresponding to the preceding GOP and located immediately prior to the preceding GOP data have already been extracted by the auxiliary data extractor 1006. If a command for high-speed reproduction is applied By user when an image included in the preceding GOP is reproduced, the jump operation that allows jumping to a sector repreened by the jump direction included in the auxiliary data extracted will be conducted. The command for high-speed operation will be through a power interface (not shown) by the user to the control circuit 1007. The control circuit 1007 retrieves the address from the auxiliary data extracted from the preceding GOP, and sends the output to the optical pickup controller circuit 1003 a control signal for jump from track to jump to a sector represented by the jump direction. This jump direction is an address that indicates a higher sector between the sectors immediately preceding the successive GOP and where the auxiliary data corresponding to the GOP euceeivo is recorded. Another track hopping has been made based on the jump direction of the auxiliary data corresponding to the preceding GOP, auxiliary data corresponding to the overcoming GOP and image data I of the successive GOP that is located immediately after the auxiliary data are retrieved, and then image I plays. The auxiliary data of the successive GOP also includes a directional jump. Immediately after reproducing the image I, a track skip is made to the next GOP 62 based on the skip address included in the auxiliary data of the successive GOP. The repetition of similar track jumps and the reproduction of the image and result in high-speed playback. Here, the jump directions included in the repective auxiliary data are obtained as described in the first example, and therefore the reproduction factor factor R is constant. Among various data recorded in the second example, the displacement data is used in the following way. The data of the offset between the auxiliary data extracted by the auxiliary data extractor 1006 represents a difference between the image number of a destination image and the image number of a successive image. Therefore, during high-speed playback, first, a track skip is performed to jump to the sector where the auxiliary data corresponding to the Successive GOP has been recorded. The buffer 1005 outputs the image data to the decoder 1008. The decoder 1008 decodes the image data received from the buffer 1005. Based on the output data of the auxiliary data extractor 1006, the decoder 1008 it does not output the decoded image data between the time when the successive image data are decoded and the time when the destination image data is decoded (ie "mutes" the decoded image). Thus, the decoder 1008 may output the destination image data as the image data 1009, immediately after the output of the preceding image data. When this operation is performed, the deetino image that is originally to be played can then be played immediately after the reproduction of the preceding image. Instead of the mute operation, repetitive output of the evasive image can be performed until the destination image is decoded in order to "freeze" or maintain the successive image until then. The apparatus for recording image information of the present invention illustrated in Figure 7, components other than A / D converter 110, memory 280 and recording head 330 can be implemented either by means of a microprocessor and a software program (software ) to control the microprocessor, or by means of physical equipment such as an ASIC (specific integrated circuit for application). It is noted that the apparatus for recording image information of the present invention may include a section associated with reproduction of information. For example, the apparatus for recording image information of the present invention includes an apparatus for recording / reproducing image information. In the same way as in the case of the apparatus, the method for recording image information of the present invention also It can include stages to reproduce image information. INDUSTRIAL APPLICABILITY As described above, in accordance with the present invention, a higher sector address among a plurality of sector addresses, wherein the auxiliary data of a successive GOP is recorded, is recorded in the recording medium as an address of jump between the auxiliary data of a preceding GOP. As a result, the apparatus for recording image information and recording method is provided for implementing a recording medium that exhibits high linearity in time axis during playback. Furthermore, according to the present invention, a parameter corresponding to a difference between a destination image and a successive image is recorded in the recording medium as displaced data for the auxiliary data of a preceding GOP. As a result, an apparatus for recording image information and recording method is provided for implementing a recording medium in which search can be performed precisely during playback.

Claims (18)

1. CLAIMS l. An apparatus for recording image information, characterized in that it comprises: an encoder for generating a plurality of group data, each of the plurality of group data includes at least intra-encoded image data, upon receiving and encoding a plurality of data of image data, each in the plurality of image data corresponds to an image; a sector address generator for generating a sector address indicating a higher sector among a plurality of sectors in a recording medium, wherein auxiliary data corresponding to each of the group plurality is recorded; an output address generator for outputting an output address of the first group data between the plurality of group data, a higher sector address among a plurality of auxiliary data sector addresses, the auxiliary data is they locate immediately prior to the data of the second group, including second image data that will be reproduced in a normal reproduction at a later second time than a first time for a predetermined fixed period of time, the first time is a time when the first image data located in a superior part of the data of the first group are reproduced in normal reproduction; and a recorder in the recording medium to record the data of the first group and the auxiliary data including the jump directions corresponding to the data of the first group in such a way that the auxiliary data including the address of the data of the first group are recorded. locates adjacent to the data of the first group in the recording medium.
2. 2. An apparatus for recording image information according to claim 1, characterized in that considering that the first time and the second time are denoted by Ti and T2, respectively and that a positive value? Ti (where i = lan, eiyn are natural numbers) is used, a first equation is satisfied: n T2 = TI -. Ti i = l and where the auxiliary data includes n types of address jumps corresponding to the second time determined by the first equation.
3. 3. An apparatus for recording image information according to claim 2, characterized in that it is considered that the first time and the second time are denoted by Ti and T2 respectively and that a positive value? Ti (where i = ian, eiyn are natural numbers) are used, satieface a second equation: n T2 = TI - ?? Ti il and where the data auxiliary also include the n types of jump direction corresponding to the second time determined by the second equation.
4. 4. An apparatus for recording image information according to claim 3, characterized in that the positive value? Ti is monotonically increased for the natural number i.
5. 5. An apparatus for recording image information according to claim 4, characterized in that the auxiliary data including the ealt addresses are recorded in the recording medium, such that the intra-coded image data is reproduced at a time interval in a range of 0.4 (s) to 1.0 (s), both inclusive in normal reproduction, the intra-coded image data is recorded adjacent to the plurality of eectoree where the auxiliary data including the address ealtoe they record.
6. 6. An apparatus for recording image information according to claim 5, characterized in that the natural number n eatisface 1 < n < nmax (where nmax is a natural number) and nmax 5.
7. 7. An apparatus for recording image information according to claim 4, characterized in that the auxiliary data including the hop directions include displacement data corresponding to a difference between a third time and the second time, the third time is a time when the third image data located in a higher sector of the second image data are reproduced in normal reproduction.
8. 8. An apparatus for recording image information according to claim 7, characterized in that the displacement data represent an interval between the second time and the third time.
9. 9. An apparatus for recording image information according to claim 7, characterized in that the displacement data represents a difference between an image number of an image represented by the second image data and an image number of a re-displayed image. for the third image data.
10. A method for recording image information, characterized in that it comprises the steps of: generating a plurality of group data, each of the plurality of the group data including the intra-encoded image data, upon receiving and encoding a plurality of image data, each of the plurality of image data corresponds to an image; generating a sector address that indicates an overhead sector between a plurality of drivers in a recording medium wherein auxiliary data corresponds to each of the plurality of group data is recorded; sending output, as a first group data address between the plurality of group data, a higher sector address among a plurality of auxiliary data sector address, the auxiliary data is located immediately preceding the data of second group including data of second image to be reproduced in a normal reproduction at a later second time than a first time for a predetermined fixed period of time, the first time is a time when the first image data located at a higher part of the data of the first group are reproduced in the normal mode; and recording in the recording medium the data of the first group and the auxiliary data including the jump direction corresponding to the data of the first group, such that the auxiliary data including the direction of jump of the data of the first group are located adjacent to the jumps of the first group in the recording medium.
11. 11. A method for recording image information according to claim 10, characterized in that it is considered that the first time and the second time are denoted by Ti and T2 respectively and that a positive value? Ti (where I - 1 an, eiyn are natural number) is used, a first equation is used: n T2 = TI + Δ Ti il and where the auxiliary data include n type of direction jump corresponding to the second time determined by the first equation.
12. 12. A method for recording image information according to claim 11, characterized in that considering that the first time and the second time ee denote by Ti and T2 repectively and that a poetic value? Ti (where i = lan, eiyn eon nümeroe naturalee) ee employe, ee eatieface a second equation: n T2 = TI - ?? Ti il and where the auxiliary data include the n types of direction jump corresponding to the second time determined by the second equation.
13. 13. An apparatus for recording image information according to claim 12, characterized in that the positive value? Ti is monotonically increased for the natural number i.
14. 14. An apparatus for recording image information according to claim 13, characterized in that the auxiliary data including the jump directions are recorded in the recording medium in such a way that the intra-encoded image data is reproduced at a time. Time interval in a range of 0.4 (s) to 1.0 (e), both inclued in normal reproduction, the intra-encoded image data is recorded adjacent to the sectors where the auxiliary data including the address jumps are recorded.
15. 15. An apparatus for recording image information according to claim 14, characterized in that the natural number n satisfies l < n < nmax (where nmax is a natural number) and nmax > 5. An apparatus for recording image information according to claim 13, characterized in that the auxiliary data including the hop directions include displacement data corresponding to a difference between a third time and the second time, the third time is a time when the third image data located in a higher sector of the second image data is reproduced in normal mode. 17. An apparatus for recording image information according to claim 16, characterized in that the displacement data repre- sent an interval between the second time and the third time r. 18. An apparatus for recording image information according to claim 16, characterized in that the displacement data represent a difference between an image number of an image represented by the second image data and an image number of an image represented for the third image data. RBSUMBN OF THE INVENTION A table generator 200 sends out a hop address 290 based on data 220 indicating GOP number, data 250 indicates image numbers, data 270 indicating times when the images are to be reproduced in normal reproduction and data 190 indicating GOP data sector address 170. A formatter 210 performs formatting such that data GOP and auxiliary data including the hop directions 290 corresponding to the GOP data are adjacent to each other. An optical head 330 for recording receives the formatted data by a recording signal processor 310 and records the data on an optical disk. As a result, even when a number of the images constituting a GOP is varied, data can be recorded on a recording medium, such that a reproduction scale factor R becomes substantially constant at high speed playback time. . RS / bo / 22 / P1335B.zip