JP3500367B2 - Information playback device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to so-called multimedia including audio information such as voice and music, video information obtained from a camera, a video device and the like, digital code data obtained from a personal computer, a word processor and the like. The present invention relates to an information reproducing apparatus which optically reads the above code pattern from an information recording medium such as paper in which information is recorded as an optically readable code pattern and reproduces original multimedia information.

[0002]

2. Description of the Related Art Conventionally, various media such as magnetic tapes and optical disks have been known as media for recording voice, music and the like. However, even if a large number of copies of these media are made, the unit price will be high to some extent, and a large amount of space will be required for their storage. Furthermore, when it is necessary to hand over a medium on which voice is recorded to another person in a remote place, it takes time and effort to send it by mail or bring it directly. There was also. In addition to audio information, video information obtained from cameras, video equipment, etc., and digital code data obtained from personal computers, word processors, etc.,
The same applies to the so-called multimedia information as a whole including the above.

Therefore, the applicant of the present invention has been able to perform facsimile transmission of multimedia information including at least one of audio information, video information, and digital code data, and also, to reproduce a large amount of image information at low cost. A system for recording on a data recording medium such as paper in the form of a dot code as coded information and a system for reproducing the same have been invented and filed as Japanese Patent Application No. 5-260464.

In the information reproducing system of this patent application, an information reproducing apparatus for optically reading and reproducing the dot code on the information recording medium is held by hand, and the information reproducing apparatus is moved along the recorded dot code on the recording medium. A method of reading by scanning manually is disclosed.

[0005]

However, the structure of the dot code pattern itself is being researched so that the recording density can be further improved, and the information recording medium and the information reproducing apparatus of the above patent application have such a structure. Flexibility to significant future changes has not yet been fully considered.

It is also desired to more reliably reproduce the code pattern.

The present invention has been made in view of the above points, and an object of the present invention is to provide an information reproducing apparatus capable of reproducing a code pattern more reliably.

[0008]

In order to achieve the above-mentioned object, the information reproducing apparatus according to the present invention comprises audio information,
Video information, multimedia information including at least one of digital code data is provided with a portion recorded in an optically readable code pattern, the code pattern is composed of a plurality of blocks, each of the blocks From the information recording medium in which a data area configured according to the content of the data of the multimedia information, a marker for defining the block, and a block address indicating the address of the block are arranged, An information reproducing apparatus for optically reading a code pattern to reproduce the original multimedia information,
When the reading unit that optically reads the code pattern and the block having the same block address are read by the reading unit in an overlapping manner, data of any one of the overlapping blocks having the same block address is selected. It is characterized by comprising block data selection processing means and a memory for writing the block data selected by the block data selection processing means.

That is, according to the information reproducing apparatus of the present invention, when the block having the same block address is read in duplicate, the data of any one of the blocks having the same block address, for example, the duplicate data. Data of one block that has a good block detection state, block address detection state, or in-block data detection state among the blocks of the same block address is written to the memory, and the data written to this memory is selected. To restore the original multimedia information, which ensures that the code pattern can be played.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Before describing the embodiments of the present invention, first, in order to help understanding of the present invention, as described in detail in Japanese Patent Application No. 5-260464 filed by the applicant of the present invention. Explain the code pattern of different dot codes.

As shown in FIGS. 2A and 2B, the dot code 10 has a structure in which a plurality of blocks 12 each composed of a plurality of dots arranged according to the content of the data are arranged. . That is, the blocks 12, which are data for each predetermined unit, are collectively arranged. One block 12 includes a marker 14, a block address 16, address error detection data 18, and a data area 20 in which actual data is stored.

Each block 1 constituting the dot code 10
2 are arranged two-dimensionally, and a block address 16 is added to each. The block address 16
Has an address corresponding to the X address and the Y address. For example, in FIG. 2A, the upper left block is (X address, Y address) = (1,1). On the other hand, the block address of the block on the right is (2, 1), and so on. Similarly, the X address is incremented toward the right, and Y is incremented toward the bottom.
The block address 16 is added to all the blocks 12 in the form that the incremented address is added.

Here, the lowermost marker and the rightmost marker are dummy markers 22. In other words, the block 12 for a certain marker 14 is the data diagonally to the lower right surrounded by the four markers 14 including it, and the markers at the bottom and right are the second from the bottom and the second from the right. An auxiliary marker, that is, a dummy marker 22 arranged to define a block for the marker.

Next, the contents of the block 12 will be described. As shown in FIG. 2B, the block address 16 is provided between the marker 14 of the block 12 and the lower marker.
And the error detection code 18 of the block address is added. Similarly, the block address 16 and its error detection code 18 are provided between the marker 14 and the right marker.
Is added. Thus, the block address 16 is arranged on the left side and the upper side of the data area 20, and the marker 14 is arranged on the upper left corner thereof. Although the block address 16 is recorded in two places in one block, it may be recorded in one place. However, by recording at two locations, even if noise occurs in one of the block addresses and an error occurs, it can be reliably detected by detecting the other address, so recording at two locations. Is preferred.

By adopting the two-dimensional block division method as described above, the information reproducing apparatus detects four adjacent markers and divides the markers equally by the number of dots for normalization. Therefore, there is an advantage that it is strong against enlargement, reduction, deformation and the like, and is also strong against camera shake and the like.

Regarding the data dots 24 in the data area 20, for example, one dot has a size of several tens of μm. This can be up to several μm level depending on the application and use, but generally 40 μm
m or 20 μm, or 80 μm. The data area 20 has a size of 64 × 64 dots, for example.
These can be freely expanded or contracted to the extent that the error due to the equal division can be absorbed. Also,
The marker 14 has a function as a position index, has a size that is not included in the modulated data, for example, a circular shape, and has a size of, for example, 7 dots or more with respect to the data dot 24, or a size of 7 × 7 dots. With a circular black marker. The block address 16 and its error detection data 18 are also composed of dots similar to the data dots 24.

Next, Japanese Patent Application No. 6-1 by the applicant of the present invention.
A multimedia paper (MMP) system for recording / reproducing a dot code pattern on an information recording medium such as paper as an example of a code pattern capable of optically reading multimedia information as described in detail in No. 21368. An example of hierarchical division of the information transfer protocol in the above will be described. Here, the layer N (N = 1 to 5) protocol is an operating protocol for realizing the function required for the layer N to respond to a request from an adjacent layer.

As shown in FIG. 3, this hierarchical division has a plurality of logical hierarchical structures of layers 1 to 5 on both the recording side and the reproducing side.

On the recording side, first, audio information such as voice and music generated by the application process X, generally an application program on a computer, video information obtained from a camera, a video device, etc.,
Also, so-called multimedia information including digital code data obtained from a personal computer, a word processor, etc. is recorded as information via an application layer (layer 5) and a presentation layer (layer 4) which are similarly configured on the computer. MM as a device
It is passed to the P recording device 26. The MMP recording device records the received data as a dot code pattern optically readable by a data link layer (layer 3), a block data layer (layer 2), and a physical layer (layer 1) (information transmission (transmission) on paper or the like. ) Print recording on the medium 30.

The information recording (transmission) medium 30 is delivered to the reproducing side. Alternatively, the code pattern recorded on the medium 30 may be transmitted to the reproducing side by facsimile and printed and recorded on the information recording medium 30 such as paper on the reproducing side.

The MMP reproducing apparatus picks up an image of the code pattern recorded on the information recording medium 30 and edits the data according to the restoration process from layer 1 to layer 3 or layer 5 contrary to the recording process. And pass the resulting data to the playback side. On the reproducing side, contrary to the recording side, the reproduced multimedia information is passed to the application process Y via the processing functions of layers 4 and 5 as necessary.

Each layer (hierarchy) on the reproduction side will be described in detail below, and the description on the recording side will be omitted because it is the reverse side of this reproduction side.

That is, FIG. 4 and FIG. 5 are diagrams showing an example of a multi-step processing process in such a plurality of hierarchical structures on the reproducing side. In these figures, N-SDU
n is the Nth layer service data unit nth (Nth Layer Serv
ice Data Unit, No.n) and N-PDUn are Nth Layer Protocol Data Units.
t, No.n) and N-PCIn are Nth layer protocol control information nth (Nth Layer Protocol Contr
ol Information, No.n) (corresponding to various processing information in the present invention), N-UDn is N layer user data nth (Nth La).
yer User Data, No.n), ADU is an application data unit (Application Data Unit), and ACH is an application control header (Application Cont.
rol Header) (n = 1 is data,
2 indicates status information, and 3 indicates control information).

First, the layer 1 (physical layer) has a basic role of ensuring reliable transmission of quantized data of a dot image. This layer 1 defines electrical / physical conditions and various conditions for quantization (that is, simple transfer regulation of dot pattern, equalization method, quantization method, etc.). The in-layer function required for this layer 1, that is, the service to be provided, is to provide a plurality of transmission media (paper types), allow a plurality of dot densities, provide a plurality of scanner resolutions, provide a plurality of video signal transmission means, and read. There is a start / end function, etc., and if necessary, it is possible to include multi-tone expression of dots (binary, multi-valued), allow multiple expressions of dots (color image capturing, transmission), etc. .

The layer 1, that is, the physical layer, is a functional module for optically capturing a dot code pattern recorded on an information recording (transmission) medium 30 such as paper as shown in FIG. 6 and outputting an image signal. (Imaging system module 32) and pre-processing (gain control, equalization processing) the image signal,
It has a functional module (reproduction equalization module 34, quantization module 36) for sampling / quantization. Further, a functional module for converting the quantized value into digital data to generate image data, and structuring the image data, from the structure information (header or first processing information) and data (entity of image data) It has a functional module that converts the data into a predetermined data format and outputs it to an adjacent upper layer, that is, layer 2, a functional module that inputs and outputs state information related to processing, and control information.

Structured (image) data in image pickup frame units is passed as a service data unit (1-SDU1) from the layer 1 to the upper layer 2.

The layer 2 (block data layer) has a basic role of reliably transmitting a block and a bit string in the block. This layer 2 defines various conditions for block transmission (that is, block detection method, channel bit detection method, coding modulation / demodulation method, etc.). The layer function required for this layer 2, that is, the provided service, includes block extraction, detection of dot sample points, provision of multiple recording methods (providing binary, multilevel, multiplex method, etc.), multiple block pattern There are provision, provision of multiple coding modulation demodulation method, detection of block relative position, notification of block detection error and obstacle overcoming work. Here, the provision of the plurality of block patterns includes a block size detection function, a mark definition / detection function, a multi-dot dot reading order correspondence, and the like.

This layer 2, that is, the block data layer, is
Structured (image) data (1-SDU1) input from the adjacent lower layer, that is, layer 1 is input as 2-PDU1, and structural information (2-PCI1 or first processing information) and data entity (2-UD1) are input. Function module that recognizes and separates the data entity into a conforming form of processing, and processes the data entity converted into the conforming form of processing, and extracts a plurality of blocks divided into predetermined information code units. Function module (block-unit dot detection point extraction (marker detection, pattern matching, etc.) module 3
8. Dot detection (identification / judgment) module 40) and a functional module (block ID data reproduction module 42, intra-block data reproduction module 4) for processing the extracted block and reproducing an information code in block units
Have 4). Here, the block-based information code includes structured information for connecting a plurality of blocks, coded modulation information, and a data substance. Furthermore, this layer 2 reads the above-mentioned coded modulation information from the information in block units,
A functional module (encoding / demodulating module 46) that demodulates a data entity according to the coded modulation information, structured information (block header, that is, second processing information) of the demodulated blocked information code, and a data entity (user data)
Is output to the adjacent upper layer, that is, layer 3, as a 2-SDU1, a functional module for inputting / outputting state information and control information related to processing, and the like.

That is, in this layer 2, the block unit dot detection point, that is, the marker is detected from the image data for each block data which is the first predetermined unit, and the data dot is detected in block unit according to the detected marker. , Return to bit string data. Details of this process are described in detail in Japanese Patent Application No. 5-260464 filed by the applicant of the present invention. Then, for this data in block units, first the header or block ID data is reproduced, then the in-block data as user data is reproduced, and the demodulation of encoding is performed to obtain the data in block data units. It is passed to the upper layer, that is, layer 3.

The layer 3 (data link layer) basically plays a role of generating a predetermined data chunk (subset element (fourth predetermined unit)) in which a predetermined error quality is guaranteed and ensuring reliable transmission. I am trying. This layer 3 is
Conditions for linking block data (first predetermined unit) and various conditions for generating macroblock (third predetermined unit) / super macroblock (second predetermined unit) (that is, interleave method / structure) ),(Supermarket)
It defines macro block header & user data error control (that is, ECC system / structure). This layer 3
The in-layer function required for the above, that is, the service provided is to provide a recovery function for block address read / write error, check the read state of the desired block (check read valid block), set the block array structure, and intermediate data block. Generation, provision of multiple interleaving methods / ranges / structures, EC
Providing multiple C methods / ranges / structures, etc.

This layer 3, that is, the data link layer, inputs the blocking information code (2-SDU1) input from the adjacent lower layer, that is, layer 2 as 3-PDU1, and from this, structured information (3-PCI1 or the second). Processing information)
Is recognized and read, and a plurality of data entities (3-UD1) in block units are concatenated according to this structured information to generate (configure) a macroblock or super macroblock (block link (macroblock generation)). ) Module 48). That is, a bit data string is received from the layer 2 in block units, and a block header as 3-PCI1 (second processing information) of a predetermined bit from the beginning of each block and a subsequent 3-UD1
The user data is identified and separated, and the blocks are concatenated according to the information written in the block header to generate a macro block. The macroblock generated in this way is composed of incidental information (macroblock header, that is, one of the second processing information) distributed in the macroblock and a data entity (user data).

The layer 3 also reads the interleave information from the macroblock header, deinterleaves the user data of the macroblock accordingly, and then reads the error correction information from the macroblock header and deinterleaves accordingly. A functional module (macroblock header unit deinterleave / error correction module 50) for error-correcting processed user data, and structured information for generating (configuring) a super-macroblock from the macroblock header, and reading it According to the above, a plurality of macro blocks are connected to each other to generate (configure) a super macro block (macro block link (super macro block generation) module 52) and the macro block header. A function module (super macroblock unit deinterleave module 54) for reading the interleave information and deinterleaving the user data of the super macroblock in accordance therewith, and error correction information for reading the macroblock header from the macroblock header. A function module (super macroblock unit error correction module 56) for error-correcting user data, and the configuration specification information of the subset element, that is, the subset element header is read from the macroblock header, and the user of the super macroblock after the error correction is read in accordance therewith. Functional module for separating subset elements from data (subset element unit output processing module 58)
And a functional module that outputs the separated subset element unit to the adjacent upper layer, that is, layer 4 as 3-SDU1, and a functional module that inputs / outputs status information and control information related to processing.

That is, this layer 3 has a multi-step function of first linking or concatenating blocks to generate a macroblock and then concatenating it into a super macroblock. After the error correction processing is completed, the subset configuration specification (third processing information) written in the macroblock header is read, the super macroblock is divided into data of the concept of subset element, and the data is output. That is, as 3-SDU1, data is transferred to the upper layer in units of subset elements.

Layer 4 (presentation layer) has a basic role of ensuring the generation of the subset. This layer 4 defines the conditions for linking the subset elements and creating the subset. The in-layer functions required for this layer 4, that is, the services provided, include selection of subset elements required for the target file, generation of subsets and determination of conditions thereof, conversion of compatible data to DOS and the like. Here, the subset means perceivable information unit data. That is, the macro block and the super macro block include multimedia information such as sounds and pictures, and each of them is regarded as one information unit such as sound only information for sound and picture only information for picture. Each piece of data divided into recognizable pieces of data is called a subset.

This layer 4, that is, the presentation layer, receives data (3-SDU1) in units of subset elements input from the adjacent lower layer, that is, layer 3 as 4-PDU.
A functional module (sub-file link information reading module 60) which inputs 1 and reads structured information (4-PCI1 or fourth processing information) from this, and a data entity (4 -UD1) and has a functional module (subset element link (subset generation) module 62) for generating (configuring) a subset.
Here, the data for each subset element is composed of structured information (subset element header) that creates (configures) a subset by linking the subset elements and a user data entity.

The layer 4 also reads, from the generated subset, additional information necessary for an existing or new interface with an adjacent upper layer, and performs interface matching with a functional module, some or all additional information of the subset. The data entity is 4-S in the adjacent upper layer, that is, layer 5.
It includes a functional module that outputs as DU1 and a functional module that inputs and outputs status information and control information related to processing.

The layer 5 (application layer) has a basic role of surely ensuring good operation of file management. This layer 5 defines various conditions for file management (that is, file generation conditions, etc.). The in-layer function required for this layer 5, that is, the service provided is to provide the read / write processing of the file or subset of the application request.

The layer 5, that is, the application layer, inputs the data (4-SDU1) of the subset input from the adjacent lower layer, that is, the layer 4 as 5-PDU1, and the incidental information (5-PCI1 or the fifth) of this subset.
Processing information) or the data entity (5-UD1), and manages the file according to the file management information, generates a file by combining subsets or subsets, and reads the file in file units ( The file management system module 64), the data unit of the subset unit or the file unit generated based on the file management to the application process 5
-Includes a functional module that outputs as SDU1 and a functional module that inputs and outputs status information and control information related to processing.

The application process has a basic role of realizing an application using the MMP system. This application process consists of shuffling method / structure of source sample data, scrambling method / structure for encryption, data compression method / structure,
There are sound, text, image data structure, etc. The function required for this application process, that is, the service provided includes a shuffling method of the source sample data, a scrambling method, and the like. If necessary, a plurality of data compression methods / compression / expansion operations can be performed. Offer,
It may include confirmation of the information type and selection of its data structure.

An embodiment of the present invention will be described below with reference to the drawings. The present invention is directed to the above-mentioned Japanese Patent Application No. 6-12136.
Layer 1 for realizing the hierarchical structure described in No. 8
It relates to the details of (physical layer) and layer 2 (block data layer).

FIG. 1 is a diagram showing the structure of layer 1, and the controller 66 controls the entire layer 1. The light source 68 controls the light emission timing and the like by the controller 66 and illuminates the dot code pattern recorded on the information recording (transmission) medium 30 such as paper. The image sensor 7
In the case of 0, the capturing timing and the like are also controlled by the controller 66, and the dot code pattern is optically imaged and an image signal is output.

The image signal output from the image pickup device 70 is
After preprocessing (gain control, equalization processing, etc.) in the analog processing unit 72, it is sampled / quantized in the A / D converter 74 and input to the digital processing unit 76. And
The header data generated by the header generation unit 78 is added to the header recording unit 80 to the image data that has been subjected to the two-dimensional filter processing or the like by the digital processing unit 76, and the first layer service data unit No. 1 (1- First as SDU1)
It is written in the memory 82.

Further, in consideration of performing shading correction and the like, the digital processing unit 76 to the D / A converter 84
A feedback system is provided for returning the analog signal to the analog processing section 72.

On the other hand, the controller 66 has a scanning start switch 86 for instructing the scanning start of the dot code pattern, and a system control file (SC
F) SCF reading switch 8 for instructing reading
8. Input switches such as a parameter setting switch 90 for setting parameters are connected. In addition, various input members can be connected as appropriate.
Furthermore, the controller 66 is connected to a parameter memory 92 relating to layer 1.

Between the controller 66 and the layer 2, the first layer service data unit No. 2 (1-SDU2
) As a status signal is exchanged. Here, the status signal is, for example, a signal indicating an error, a signal indicating that data is stored in the memory 82, or the like.
The error occurrence may be detected by the error occurrence detection unit 66A inside the controller 66, or may be detected by each circuit configuration unit. For example, the analog processing unit 72 is provided with a circuit for detecting that only dark ones are input as the video signal from the image pickup device 70, and the detection signal is supplied to the controller 6
It can be output to 6 and reflected in 1-SDU2.

Further, between the controller 66 and the layer 2, the 1st layer service data unit No. 3 (1-SDU
3) Parameter setting signals are exchanged. Here, the parameter setting signal is, for example, a signal set in the layer 1 parameter memory 92 in the form of inputting a red image from the upper layer when the dot code pattern is color-multiplexed and recorded. . In response to such a parameter setting signal, the controller 66 selects red as the light source 68, causes the image sensor 70 to image only red information, and causes the header generation unit 78 to generate a header including information of red. The header recording unit 80 adds the header to the image data and writes it in the first memory 82.

Next, the first layer service data unit 1
The number (1-SDU1) will be described.

FIG. 7A shows an example thereof. First, a set standard identification code 94 is described. The set standard identification code 94 is a code representing parameters such as dot size and block size. That is, these parameters required for the process for decoding the content of the dot code data performed in the upper layer can be referred from the predetermined memory by referring to this code. For example, if the set standard identification code 94 is “00”, a certain parameter is set in layer 1, a parameter required in layer 2 is set in layer 2, and a parameter required in layer 3 is set in layer 3. For example, the same code "00" is set to Layer 1, Layer 2, and so on.
.., layer 5, etc., but the parameters input to each are different for each layer.

The set standard identification code 94 is, as shown in FIG. 8A, a system control file (SCF) 96 recorded on an information recording (transmission) medium 30 such as paper on which the dot code 10 is recorded. Is set by reading.

This SCF 96 is, for example, as shown in FIG.
As shown in, the dot pattern is recorded in the same manner as the dot code 10. However, the SCF 96 is recorded with dots of a predetermined size, regardless of the printing method with a low resolution and vice versa. . That is, it is formed as a code that can be read by any MMP reproducing device.

When the SCF reading switch 88 is operated, the operation signal is input to the controller 66 and also to the layer 1 parameter memory 92, and a predetermined SCF reading parameter is input from the parameter memory 92. It is input to the controller 66.
Then, the controller 66 controls each unit according to the input parameters, and outputs the read image data as 1
-SDU1 is output to the upper layer, and a status signal indicating that the SCF is being read is output to the upper layer as 1-SDU2. Then, in the upper layer, this SCF96
Contents are decoded and parameter setting signal is 1-SDU
3 is input from the upper layer and is stored in the layer 1 parameter memory 92. When the actual dot code 10 is read according to the operation of the scan start switch 86, a header is generated according to the content stored in the parameter memory 92. The section 78 generates an appropriate set standard identification code 94 as part of the header.

The SCF 96 does not consist of dots as shown in (C) of the figure, but the size of one dot of the dot code 10 is what, and the set standard is no. It may be described in characters, such as being shaken. In this case, the operator looks at the SCF 96 and makes a key input from the outside using the input means.

Alternatively, this set standard identification code 94
Can also be set by the parameter setting switch 90. That is, by manually setting digital data such as "00" or "11" with a dip switch or the like, parameters such as dot size are arbitrarily and immediately reflected in the set standard identification code 94. Is also good.

Next, UD1 format type 98 is described in 1-SDU1. The UD1 format type 98 represents a parameter item for image data defined by the number of horizontal frame pixels 100 to the number of frames 114 described below. That is, by describing the UD1 format type 98, it is possible to omit all the contents of those parameters. For example, when the UD1 format type 98 is set to "00", the contents of these parameters do not have to be specified, and conversely, when "FF" is set to this, the user can arbitrarily set those parameters. And allow parameters to be entered for each item. In other words, this UD1 format type 98
One is a function that represents a parameter, the other is
One has two functions, that is, a function of defining a parameter item and switching to a setting in which the item can be written.

Here, as parameters, the number of horizontal pixels for a frame is 100 and the number of vertical pixels for a frame is 10.
2, horizontal pixel pitch information 104, vertical pixel pitch information 106, multiplex information 108, gradation 110, optical magnification 112, and frame number 114 are described. here,
The multiplex information 108 indicates color information of RGB if it is a color. In other words, it is information about what the image that is being captured shows, red is red, and blue is blue. Also, the gradation 110
Is the gradation indicated by the A / D converter 74, and the optical magnification 112 is the magnification of the lens of the optical system (not shown). The number of frames 114 is not necessary for a type in which sequential processing is started if one frame is sequentially input, but processing is performed after all image data is input to the first memory 82 as in the present embodiment. In the case of a system that starts, it is written because it is easier to recognize if the number of frames is recorded in the header.

Next to these parameters, image data to be the user data 116 is input.

Among the above parameters, the frame horizontal pixel number 100, the frame vertical pixel number 102, the horizontal pixel pitch information 104, the vertical pixel pitch information 106, and the optical magnification 112 are manufactured by the image reading unit of the MMP reproducing apparatus. Since the information is uniquely determined at this time, it may be stored in the header generation unit 78 or the layer 1 parameter memory 92 as a ROM. Also, the above parameters are
Since layer 1 is a layer that handles image data, for example, TI
It is also possible to use a commonly used image data format such as FF.

FIG. 8D is a diagram showing how the header is written. That is, as shown at the top, the user data 11
When the first pixel and the second pixel of the image data are written as 6, the header 118 is displayed as the second from the top.
Is entered at the beginning of the pixel data.

Here, the header 118 may include only the set standard identification code 94 as shown below, or may further include the set standard identification code 94 and the UD1 format type 98 as shown below. Good as a thing. Further, as shown at the bottom, if there is a set standard identification code 94, and then there is a UD1 format type 98, and if this UD1 format type 98 describes the mode for setting each parameter as described above. , Frame horizontal pixel number 100 to frame number 11
It may include four parameters.

Note that such a header 118 is input to the first memory 82 of the type in which the upper layer processing is started after all the image data of a plurality of frames are stored in the first memory 82. It is sufficient to put one in the data. Also, in the case of a type that starts processing each time one frame of image data is stored, it may not be necessary to insert the header 118 unless the parameters have changed, but for confirmation purposes, one frame of image It is preferable to put it at the beginning for each data.

FIG. 7B is a flow chart for explaining the recording process of the header 118 executed by the header generator 78 and the header recorder 80.

The header generator 78 first determines whether or not the parameters have been determined, that is, whether or not the parameters for decoding the data have been input (step S1). This determination is made so as not to waste a wasteful time that the process proceeds in the state where the parameters are not fixed.

When the parameter has not been finalized, the header generator 78 outputs error information to the controller 66 (step S2). The controller 66 that has received this error information is
The occurrence of an error is detected by A and transmitted to the upper layer by the status signal of 1-SDU2. Upon receiving the status signal, the upper layer finally displays an error on the monitor or emits an error sound to notify the user of the occurrence of the error.

If the parameters have been determined, the header generator 78 sequentially accesses a format recording unit (ROM) (not shown) and writes the parameters specific to the scanner, such as frame horizontal pixels. Number 10
0, frame vertical pixel number 102, horizontal pixel pitch information 1
04, vertical pixel pitch information 106, optical magnification 112 and the like are read out and output to the header recording section 80 (step S
3). Further, parameters such as multiplex information 108 and gradation 110 are generated according to the color and multiplex information set from the upper layer stored in the layer 1 parameter memory 92 via the controller 66, and output to the header recording unit 80. (Step S4). Then, the header recording unit 80 once writes those parameters in the first memory 82 at this stage (step S5).

Thereafter, the header generator 78 finally determines whether or not the number of frames is required (step S6), and ends the header recording process if there is no need. If necessary, the number of frames is incremented to generate a parameter for the number of frames 114 and output to the header recording unit 80 (step S7). Then, the header recording unit 80
Writes the number of frames 114 in the first memory 82 (step S8), and ends the header recording process.

That is, as shown in FIG. 9A, first, in step S5, the header is recorded, and the frame image is recorded. Finally, if it is determined that the number of frames is necessary, the number of frames is determined. It is calculated and written in the first memory 82 in step S8.

Next, the layer 2 will be described.

FIG. 10 is a diagram showing the structure of layer 2.

This layer 2 includes 1 from the layer 1 above.
Layer service data unit 1 (1-SDU1) to 2
Received as the layer protocol data unit No. 1 (2-PDU1). In addition, the status signal 1-SDU2
1-SDU which is a parameter setting signal as PCI2
3 is received as 2-PCI3 and conversely 2-PCI2 is 1-
2-PCI3 is output as SDU2 to layer 1 as 1-SDU3.

Here, the status signal indicates an error status, a scanning status, a frame writing status, a service data unit writing status, and the like, and in the opposite direction, reading of the service data unit and the first memory 82. The state of completion of data reading is shown. The parameter setting signal is a parameter setting signal for reading the contents of the parameter from the parameter memory 92 in the layer 1 or writing the parameter therein.

The layer 2 includes the first memory 82, the controller 120, and the block detector 1 which are common to the layer 1.
22, a block address detection unit 124, an in-block data detection unit 126, a parameter memory 128, and an upper layer, that is, a second memory 130 common to the layer 3.

The 2-PDU1 is stored in the first memory 82, and the header 118 as structure information therein is
The layer 2 protocol control information No. 1 (2-PCI1) is input to the controller 120, and the layer 2 user data No. 1 (2
-UD1) is input to the block detection unit 122, the block address detection unit 124, and the in-block data detection unit 126.

The block detecting unit 122 includes a marker detecting unit, a data array direction detecting unit, a marker interpolating circuit, and the like, which are described in detail in Japanese Patent Application No. 5-260464 by the applicant of the present invention. The block address detection unit 124 also includes a block address detection unit, an error determination unit, an accurate center detection unit, a marker / block address interpolation unit, and the like. The intra-block data detection unit 126 similarly includes an address control unit, an interpolation circuit, a binarization processing unit, a threshold value determination circuit, a demodulation unit, and the like.
Therefore, detailed description of each of these parts will be omitted.

Further, the parameter memory 128 has parameters representing the processing method of each process and parameters necessary for the process, such as the block size and the demodulation method.
It stores data such as.

On the other hand, the controller 120 includes a protocol control information decoding unit 120A, a parameter setting unit 120B, an error occurrence detection unit 120C, and a control unit 120D. Here, the protocol control information decoding unit 120A is 2PC.
The parameter setting section 120B reads the parameter from the parameter memory 128 and calculates the read parameter or the parameter based on the decoding information by the protocol control information data decoding section 120A. The data to be set is set in each block. The error occurrence detection unit 120C detects, for example, an error of a block address and the occurrence of other errors, and the control unit 120D controls the entire layer 2.

The controller 120 communicates with the upper layer 3, that is, 2-SDU2 (layer 3) which is a status signal.
3-PCI2 seen from the side, and 2-SDU3 which is a parameter setting signal (3-PCI3 seen from the layer 3 side)
) To exchange. Here, the status signal is a signal indicating the error status detected by the error occurrence detection unit 120C, a signal indicating the scanning status received from the layer 1, and the contents of the service data unit created in the layer 2 in the second memory 1
30 includes a write status signal indicating whether or not the data has been written in 30, or a read status signal in the reverse direction for determining whether or not the content of the second memory 130 has been read out in layer 3. The parameter setting signal is a signal for setting data from the upper layer portion to the parameter memory 128 and reading the contents of the parameter memory 128 in the upper layer portion.

Next, the contents of the service data unit will be described.

1-SDU written in the first memory 82
As shown in FIGS. 11A and 11B, 1 (2-PDU1) is composed of protocol control information as the header 118 and image data 116 as the user data. Therefore, the description is omitted.

Also, written in the second memory 130,
The 2-SDU 1 that is the output of the layer 2 is for processing the blocks included in the image by the layer 2 and writing the blocks in the second memory 130 in block units.
As shown in FIG. 12A, 2-SDU1 attached information 132 as a block header and data 1 in the block
And 34.

Then, the above-mentioned 2-SDU1 attached information 132
Serves as block identification information, and includes a set standard identification code 136, a user data format type 138, a block address 140, and an in-block data number 142, as shown in FIG.

Here, the set standard identification code 136 is
It is a copy of the set standard identification code 94 sent from Layer 1, that is, the same. On the other hand, the user data format type 138 is different from the user data format type 98 of layer 1, and how the layer 3 reads the content of this 3-PDU1, the type of parameter and its content. It shows how the is in. That is, the definition is the same as that of layer 1, but for example, when the user data format type 138 has a code of “01”, the block address 140 and the number of blocks of data 142 are added to the user data. Send, for example, in the case of "02", block address 140
And the number of data in the block 142 and other data are added to the user data and sent, and the layer 3 selects and recognizes the type and arrangement of 3-PCI1 information.

By thus adding the block address 140 and the number of blocks of data 142, the layer 3
By recognizing the information, the layer 2 can recognize the difference even if the information of the code having the different block data size is transferred, and can process it. .

FIG. 9B is a diagram showing the 2-SDU1 attached information 132 when the user data format type 138 is the code "02" described above. In this case, the above set standard identification code 1
36, user data format type 138, block address 140, and in-block data number 142, block address no compensation / presence 144, erroneous detection marker information 146, compensation marker information 148, demodulation error number 150, demodulation error position information Included is information indicating the processing state when a block such as 152 is detected.

Here, the demodulation error count of 150 means that when the blocks are linked in layer 3, data of the same block is transferred redundantly, that is, when the block of the same address is transferred several times. , If the demodulation error number 150 is sent from layer 2, the data before error correction is performed by comparing the demodulation error numbers up to the previous time and this time and selecting and reconstructing the block data with few errors. It is provided because the error rate can be reduced and the error can be corrected at high speed.

In addition, in the data of the same block that has been transferred redundantly, if the bit or data that has been a demodulation error up to the previous time is not the current error, the bit or data is replaced with the current bit or data. By changing to, the error rate can be reduced and error correction can be performed at high speed. That is, the demodulation error position information 152 is provided so that the layer 3 can replace the error location with new non-error data.

The false detection marker information 146 compares the false detection marker information (the number and the area) in the block up to the previous time in the data of the same block transferred redundantly. It is provided because the error rate can be reduced and error correction can be performed at high speed by selecting and reconstructing a small amount of block data.

Next, the operation of layer 2 will be described with reference to a series of flowcharts in FIGS. 13 and 14.

First, the controller 120 (control section 120D) performs the initial setting of the whole (step S1).
1), it is determined by reading from the status signal (2-PCI2) whether the data of 1-SDU1 has been written in the first memory 82 (step S12). Then, if it is in an unfinished state such as writing, the writing is awaited.

When recognizing the state that 1-SDU1 has been written, first, the protocol information decoding unit 120A reads the 2PCI1 set standard identification code 94 from the first memory 82 and decodes it. Necessary parameters are read from the parameter memory 128 (step S13). That is, from the set standard identification code 94, a parameter that cannot be reproduced from a dot code such as a dot size, a block size, a demodulation method, a block address error correction method, etc. is recognized, and the corresponding parameter is used as a parameter. Read from memory 128.

Next, the protocol information decoding unit 120A determines the user data format type 98.
And the parameters written after that are decoded (step S
14). That is, by reading information such as the number of frame horizontal pixels 100, the number of frame vertical pixels 102, the horizontal pixel pitch information 104, the vertical pixel pitch information 106, the multiplex information 108, the gradation 110, the optical magnification 112, the number of frames 114, and the like, Determine what the image looks like. Then, based on this information and the information read in step S13, the parameter setting unit 120B sets the parameter (step S15).

Next, the image data 116 of 2-SDU1 is input to the block detection unit 122, and the block detection processing is performed using the set parameters (step S1).
6). This means that block detection is performed on one image. Then, it is judged whether or not there is an unprocessed block among the detected blocks (step S17), and if there is no unprocessed block, the process returns to step S12. That is, when the image is capturing a portion other than the code, the block is not detected, so that the process returns to the original and waits for the next image.

When it is determined that the code is included in one image, for example, when four unprocessed blocks are included, the process proceeds to the next process, and the unprocessed block One is selected (step S18). Then, the block address detection unit 124 performs detection of the block address of the block and error detection or error correction processing of the address (step S19).

Here, the error occurrence detector 120C determines whether or not there is an error (step S20), and if there is an error, the block address is compensated (step S21). If the error is still present (step S22), the error state of the block address is set to 2-SDU2 and transmitted to layer 3 (step S23), and then the process returns to step S16 to proceed to the next block. Is detected.

If there is no address error in step S20, or in step S2
If it is determined that the error is compensated in 2,
2-SDU2, that is, the status signal is read out, and the second memory 13
It is confirmed whether 0 is empty, that is, whether reading of data from the second memory 130 is completed in layer 3 (step S24), and waits for the second memory 130 to become empty.

When the second memory 130 is empty, the 2PCI1 set standard identification code 94 is copied and set in the attachment information 132 of the 2-SDU1 for the layer 3 (step S25). The user data format type to be sent to is sent from the parameter memory 128 and set to the user data format type 138 of the attachment information 132 of 2-SDU1 (step S26).

Next, the block address detecting section 124.
The block address detected in step S27 is set in the block address 140 of the attachment information 132 of 2-SDU1 (step S27), and the number of blocks of data is calculated,
It is set to the number of in-block data 142 of the attached information 132 of DU1 (step S28). The calculation of the number of pieces of data in the block is performed by using the information on the block size stored in the parameter memory 128, for example, the information that the block is composed of horizontal 50 dots × vertical 50 dots and the size of the marker is how many dots. Read and done with it.

Then, the in-block data detection unit 126 performs a process of detecting data in the block including interpolation and demodulation (step S29), and the information calculated in each process is selected by the user data format type 138. Set (step S30). That is, for example, if it is the code "02",
As shown in FIG. 9B, information such as the block address non-compensation / presence 144, the false detection marker information 146, the compensation marker information 148, the demodulation error number 150, the demodulation error position information 152, and the like are set.

Then, the data for the layer 3, that is, the in-block data 134 detected by the in-block data detection unit 126 is written to the second memory 130 (step S31), and the status signal 2-SDU2 is written to the memory. After setting the end state of (step S32), the process returns to step S16, the same processing is performed if there is a next block, and if there is no next block, the next screen is waited (step S17).

In step S24, it is assumed that the layer 3 waits for the data in the second memory 130 to be read. However, if the storage capacity of the second memory 130 is large, such processing is not performed. Of course, it is okay. Further, if the data is transferred for each data instead of the data for each block, the second memory 130 may not be provided, and the storage capacity for one block may be increased. It is also possible to use a FIFO memory or the like instead of the second memory 130 provided.

Next, the block link part in layer 3 will be described with reference to FIG.

Here, the above-mentioned 2-SDU1 is written in the second memory 130, which is written in the controller 1
This is decoded by the 3-PCI1 protocol control information decoding unit 154A of 54. That is, the protocol control information decoding unit 154A
Then, the block detection state information determination unit 154Aa of the 2-SDU1 attached information uses the demodulation error number 150, the error position information 152, the erroneous detection marker information 146, the compensation marker information 148, the block address compensation non-existence / existence 144,
Etc. are decoded and the decoding result is output to the block data selection processing unit 156. Block data selection processing unit 156
Is a block data selection process as described above with respect to duplicately input block data, that is, a process of excluding many blocks if there are many demodulation errors, that is, a process of selecting blocks with few errors. Memory for block data link (memory 2 ') 1
At 58, data is written to the memory address corresponding to each block address.

The control unit 154B inside the controller 154 is for controlling the entire layer 3, and the parameter memory 160 stores parameters necessary for each processing.

FIG. 16 is a flow chart showing the processing performed in the layer 3 as described above. That is, the controller 154 (control unit 154B) first performs the initial setting of the whole (step S41) and reads from the status signal (3-PCI2) whether the data of 2-SDU1 is written in the second memory 130. A judgment is made (step S42). Then, if it is in an unfinished state such as writing, the writing is awaited.

When recognizing the state that 2-SDU1 has been written, first, the protocol information decoding unit 154A reads the set standard identification code 136 of 3PCI1 from the second memory 130 and decodes it, and according to the result, it is processed in the layer. Necessary parameters are read from the parameter memory 160 (step S43).

Next, the protocol information decoding unit 154A determines the user data format type 13
8 and the parameters written after that are decoded, and the number of demodulation errors 150, the error position information 152, and the erroneously detected marker information 1 are detected by the block detection state information determination unit 154Aa.
46, compensation marker information 148, block address compensation non-existence / existence 144, etc. are decoded (step S44). Then, parameters are set based on this information and the information read in step S43 (step S45).

After that, the block data detection processing unit 156
Block data is selected based on that information.
Memory for block data link (memory 2 ') 158
Data is written to the memory address corresponding to each block address (step S46). Then, after performing other processing of the layer 3 such as deinterleaving and error correction processing on the data written in the memory 2 '(step S47), the process returns to the step S42 and the next data comes. Wait until

Although the present invention has been described based on the embodiments above, the present invention is not limited to the above-mentioned embodiments, and various modifications and applications are possible within the scope of the gist of the present invention. . Here, the summary of the present invention is summarized as follows.

(1) In an information recording medium having a portion in which multimedia information including at least one of audio information, video information and digital code data is recorded in an optically readable code pattern, An information recording medium on which information representing a processing parameter required for decoding is recorded.

That is, since the information (system control file: SCF) indicating the processing parameter necessary for decoding the code pattern is also recorded together with the code pattern, by setting the parameter according to this SCF, the reliable code pattern can be obtained. Decryption is possible.

(2) The information recording medium described in (1) is characterized in that the information representing the processing parameter is recorded as a code pattern having a predetermined size.

That is, even if the user does not recognize the format of the SCF code, it is possible to set the processing parameters simply by scanning the SCF code pattern.

(3) The information recording medium described in (1) is characterized in that the information representing the processing parameter is recorded as a character.

That is, the user can visually recognize the contents of the processing parameter, and the SCF code recognition processing in the reproducing apparatus is not necessary, so that the processing can be reduced.

(4) The code pattern is read from an information recording medium having a portion in which multimedia information including at least one of audio information, video information and digital code data is recorded in an optically readable code pattern. In the information reproducing apparatus for reproducing and reproducing the original multimedia information, the information recording medium is
Information representing a processing parameter required for decoding the code pattern is recorded, and an input means is provided for inputting information representing the processing parameter recorded in the information recording medium. Information reproducing device.

That is, since the information recording system (system control file: SCF) indicating the processing parameter necessary for decoding the code pattern is also recorded together with the code pattern on the information recording medium, if this SCF is input, the parameter is changed accordingly. Can be set, and more reliable decoding of the code pattern becomes possible.

(5) The information representing the processing parameters is recorded as a code pattern of a predetermined size, and the input means decodes the code pattern and the read code pattern. (4) The information reproducing apparatus according to (4), further comprising:

That is, even if the user does not recognize the format of the SCF code, it is possible to set the processing parameters simply by scanning the SCF code pattern.

(6) When the code pattern as the information representing the processing parameter is read, the processing parameters of the reading means and the decoding means are set to predetermined parameters, and the code pattern corresponding to the multimedia information is set. The information according to (4), further comprising switching means for switching so that the processing parameters of the reading means and the decoding means are set to the decoded processing parameters when reading and decoding. Playback device.

That is, different processing parameters are required for the SCF and the actual code pattern, and the switching can be easily performed.

(7) The information representing the processing parameters is recorded as characters, and the input means includes switch input means for manually inputting the information representing the processing parameters recorded as the characters. (4) The information reproducing apparatus described in (4).

That is, since the user visually recognizes the content of the processing parameter and inputs it by the switch, the SCF code recognition processing in the information reproducing apparatus becomes unnecessary and the processing can be reduced.

(8) Scanning means for scanning the code pattern corresponding to the multimedia information, and when the scanning means scans the code pattern, when the information representing the processing parameter is not input from the input means, The information reproducing apparatus according to (4), further comprising means for outputting an error.

That is, by outputting an error when the processing parameter is not set, it becomes clear to the user why the code pattern is not reproduced even if it is scanned. Further, it becomes unnecessary to perform the subsequent extra processing on the scanned image in the information reproducing apparatus.

(9) The above code is optically read from a recording medium having a portion in which multimedia information including at least one of audio information, video information and digital code data is recorded as an optically readable code. Reading, converting the read code into code data as an image (image), and adding information related to the reading (resolution, imaging range, expression form of code data, etc.) to the code data as first processing information. The first layer processing means for outputting the code data output from the first layer processing means by recognizing (reading) the first processing information output from the first layer processing means. Second hierarchical processing means for processing and generating and outputting a block in which the code data is collected for each predetermined unit; The blocks output from the second hierarchical processing means are collected, and at least the second processing information necessary for generating a super macro block of a larger predetermined unit is extracted from the code data of the blocks and recognized. A third macro for generating a super macroblock based on this second processing information and performing processing relating to error countermeasures.
Processing information is extracted and recognized from the super macroblock, processing for error countermeasures of the super macroblock is performed based on the third processing information, and the supermacroblock is discretized based on the third processing information. A third layer processing means for outputting the generated subset element and a subset element output from the third layer processing means for generating a subset consisting of a code of a predetermined unit capable of restoring the multimedia information. Fourth layer processing means for extracting at least the fourth processing information necessary for performing the processing from the subset element and outputting the subset generated based on the fourth processing information; and the fourth layer. Outputting means for outputting the subset output from the processing means as restored multimedia information In the information reproducing apparatus including: the first hierarchical processing means, an imaging means for imaging the code, and a quantization means for quantizing a video signal from the imaging means to convert the video signal into the code data. A header generating means for generating the information regarding the imaging and the quantization and adding the information as the first processing information (header) to the code data; and storing the code data to which the first processing information is added. An information reproducing device, comprising:

That is, by defining the first hierarchical processing means as described above, the format for image transmission can be defined. And by defining the image format,
If an image is constructed in that format, there is an advantage that processing can be performed by the subsequent hierarchical processing means (however, a header is required). Further, the processing can be divided by the storage means, for example, the memory, so that the change of the first hierarchical processing means does not affect the processing of other layers.

(10) The header generating means further generates processing parameters required by the second hierarchical processing means, and adds the processing parameters to the first processing information and adds the processing parameters to the front of the code data. (9) The information reproducing apparatus described in (9) above.

That is, by indicating the format stored in the memory by the header, it becomes possible for the second hierarchical processing means to cope with the change of the first hierarchical processing means.

(11) The header generating means generates a set standard identification code as reference information of a parameter required by another hierarchical processing means, and includes it in the first processing information before the code data. (9) The information reproducing apparatus according to (9), further comprising:

That is, the parameters are set in each layer and the data amount of the header can be reduced by simply referring to the set standard identification code without describing all the various parameters.

(12) The header generation means stores the first processing information in the storage means before performing the storage operation of the code data and adds the first processing information to the code data. (9) The information reproducing apparatus described in (9), further comprising means.

That is, the header can be referred to before the processing of the code data (user data) in the second hierarchical processing means. That is, the parameters can be set before performing the processing, and the processing speed can be increased.

(13) The second layer processing means has a decoding means for decoding the first processing information output from the first layer processing means (9).
The information reproducing apparatus described in.

That is, by decoding the first processing information, it becomes possible to deal with the first hierarchical processing means (imaging section) having various configurations.

(14) The second hierarchical processing means collects the code data from the code data output from the first hierarchical processing means in predetermined units (for example, vertical 50 dots × horizontal 50 dots). The information reproduction according to (9), further comprising block detection means for detecting a block that has been detected, and block identification information generation means for generating block identification information for identifying the block detected by the block detection means. apparatus.

That is, according to the block identification information, the following third
In the hierarchical processing means, it becomes possible to know the selection of block data, the number of blocks, and the connection method between blocks.

(15) The information reproducing apparatus described in (14) is characterized in that the block identification information generating means has means for generating the block identification information including the number of data in the block.

That is, even if there are blocks having different numbers of data in one block or blocks having different numbers of data in one code, reproduction can be performed by referring to the number of blocks in the subsequent layers. become able to.

(16) Block detection collected by the second hierarchical processing means from the code data output from the first hierarchical processing means for each of the predetermined units (for example, vertical 50 dots × horizontal 50 dots). Block detecting means for
The information reproducing apparatus according to (9), further comprising block detection state information generating means for generating information indicating a detection state of the block in the block detecting means.

That is, by generating a block detection state for each block when a block is detected, it becomes possible to selectively process a good block by referring to this block detection state in the subsequent layers, thus reducing the occurrence of errors. You will be able to.

(17) The information reproducing apparatus described in (16), characterized in that the third hierarchical processing means has means for decoding the block detection state information.

That is, the error rate can be reduced by selecting a good block or block data by decoding the block detection state information for a block having a specific block address to be processed redundantly. Further, when the error correction is performed in the subsequent stage, the error correction rate can be increased and the correction can be performed at high speed.

(18) The block detecting means includes code data demodulating means, and the block detecting state information generating means includes means for generating block detecting state information including information on the number of demodulation errors. (16)
The information reproducing apparatus described in.

That is, since demodulation means capable of generating a demodulation error number for each block at the time of demodulation is used to output the demodulation error number, blocks having a smaller demodulation error number in the subsequent layers are selected. The processing can be selectively performed, and the occurrence of errors can be reduced.

(19) The information reproducing apparatus described in (18), characterized in that the third layer processing means has means for decoding the block detection state information.

That is, the error rate can be reduced by selecting a block having a small demodulation error by decoding the block detection state information for a block having a specific block address to be processed in duplicate. Further, when the error correction is performed in the subsequent stage, the error correction rate can be increased and the correction can be performed at high speed.

(20) The block detection means includes code data demodulation means, and the block detection state information generation means has means for generating block detection state information including information on a demodulation error position. (1
The information reproducing device according to 6).

That is, since demodulation means capable of generating a demodulation error position for each block at the time of demodulation is used to output the demodulation error position, the block data having no demodulation error is generated in the subsequent layers. The processing can be selectively performed, and the occurrence of errors can be reduced.

(21) The information reproducing apparatus described in (20), characterized in that the third hierarchical processing means has means for decoding the block detection state information.

That is, the error rate can be reduced by selecting the block having no demodulation error by decoding the block detection state information for the block data having a specific block address to be processed redundantly. Further, when the error correction is performed in the subsequent stage, the error correction rate can be increased and the correction can be performed at high speed.

(22) The block detecting means includes a marker detecting means for detecting a marker provided at a predetermined position of the block, a marker compensating means for compensating a marker not detected by the marker detecting means, and the marker. The block detection state information generating means includes information on the marker compensated by the marker compensating means (number of compensating markers, compensating marker position). (16) The information reproducing apparatus according to (16), further comprising means for generating block detection state information including

That is, if there is a compensation marker or a large number of compensation markers, the position of the block data may be erroneous. However, by outputting the compensation marker information, the number of this compensation marker in the subsequent layers is increased. It becomes possible to selectively process a small number of blocks, and it becomes possible to reduce the occurrence of errors.

(23) The information reproducing apparatus described in (22), wherein the third hierarchical processing means has means for decoding the block detection state information.

That is, the error rate can be reduced by selecting a block having a small number of compensation markers by decoding the block detection state information for a block having a specific block address to be processed redundantly. Further, when the error correction is performed in the subsequent stage, the error correction rate can be increased and the correction can be performed at high speed.

(24) The block detecting means includes a block address detecting means provided at a predetermined position of the block for detecting a block address indicating an address of the block, and a block address determined to be an error by the block address detecting means. Block address compensating means for compensating for the block address, and means for detecting a block based on the block address obtained by the block address detecting means and the compensating means. (16) The information reproducing apparatus according to (16), further comprising means for generating block detection state information including information on the compensated block address (compensated / not compensated).

That is, the probability that the block address is detected as an error during the error correction processing and the compensated block address is in error has a higher probability than in the case where the block address is not in error during error correction. Further, when the block address becomes an error at the time of error correction, it may be a burst error due to dust or scratches, and the block data which is data near the block address has a high probability of being in error. Therefore, by outputting the block address compensation information, it becomes possible to selectively process blocks without compensation in the subsequent layers, and it is possible to reduce the occurrence of errors.

(25) The information reproducing apparatus described in (24), characterized in that the third hierarchical processing means has means for decoding the block detection state information.

That is, the error rate can be reduced by selecting a block that has not been compensated by decoding the block detection state information for a block having a specific block address to be processed in duplicate. Further, when the error correction is performed in the subsequent stage, the error correction rate can be increased and the correction can be performed at high speed.

(26) The block detecting means includes marker detecting means for detecting a marker provided at a predetermined position of the block, and means for detecting the block based on the marker obtained by the marker detecting means. The block detection state information generating means has a means for generating block detection state information including information on a marker erroneously detected as being in a block by the marker detecting means (16). Information reproduction device.

That is, when there is an erroneously detected marker in the block, an error exists in the block data, and when the number of the erroneously detected markers is large or the size (area) is large, the error rate becomes high. . Therefore, by outputting the in-block erroneous detection marker information, it becomes possible to selectively process the satisfactorily detected block data in which the in-block erroneous detection marker is not detected or is small in the subsequent layers, which causes an error. Can be reduced.

(27) The information reproducing apparatus according to (26), characterized in that the third layer processing means has means for decoding the block detection state information.

That is, for a block having a specific block address to be processed in duplicate, the block detection state information is decoded to select well detected block data having no intra-block erroneous detection marker. As a result, the error rate can be reduced, the error correction rate can be increased when the error correction is performed in the subsequent stage, and the error correction can be performed at high speed.

[0162]

As described in detail above, according to the present invention,
It is possible to provide an information reproducing device that can reproduce a code pattern more reliably.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a layer 1 according to an embodiment.

FIG. 2 is a diagram showing a dot code format.

FIG. 3 is a diagram showing an example of hierarchical division of an information transfer protocol in a multimedia paper system.

FIG. 4 is a diagram showing a structural example of a lower layer in the hierarchical structure on the reproduction side.

FIG. 5 is a diagram showing a structural example of an upper layer of the hierarchical structure on the reproduction side.

FIG. 6 is a diagram showing a captured dot code image.

FIG. 7A is a first layer service data unit No. 1 (1
-SDU1), in which (B) is a layer 1
5 is a flowchart for explaining a header recording process executed by a header generation unit and a header recording unit of FIG.

8A to 8C are diagrams for explaining a system control file (SCF), and FIG. 8D is a diagram showing how a header is written.

FIG. 9A is a timing chart for explaining a header write timing, and FIG. 9B is an example of 2-SDU1 attached information when the user data format type is a code of “02”. FIG.

FIG. 10 is a block configuration diagram of Layer 2 according to an embodiment.

FIG. 11A is a 1-SD written in the first memory.
It is a figure which shows U1 (2-PDU1), (B) is (A).
2 is a diagram showing the contents of 2-PCI1 protocol control information.

FIG. 12A is a 2-SD written in the second memory.
It is a figure which shows U1, and (B) is a figure which shows the content of 2-SDU1 attachment information of (A) when a user data format type is a code "01".

FIG. 13 is a diagram showing a first half portion of a series of flowcharts for explaining an operation of layer 2;

FIG. 14 is a diagram showing the latter half of a series of flowcharts for explaining the operation of layer 2;

FIG. 15 is a block configuration diagram of Layer 3 according to an embodiment.

FIG. 16 is a flowchart for explaining an operation of layer 3.

[Explanation of symbols]

66 ... Controller, 66A ... Error occurrence detection unit, 68
... light source, 70 ... image sensor, 72 ... analog processing unit, 74
... A / D converter, 76 ... Digital processing section, 78 ... Header generating section, 80 ... Header recording section, 82 ... First memory, 8
4 ... D / A converter, 86 ... Scan start switch, 88 ... S
CF reading switch, 90 ... Parameter setting switch, 9
2 ... Layer 1 parameter memory, 94 ... Set standard identification code, 96 ... System control file (SC
F), 98 ... UD1 format type, 100 ... Frame horizontal pixel number, 102 ... Frame vertical pixel number, 104
... horizontal pixel pitch information, 106 ... vertical pixel pitch information,
108 ... Multiple information, 110 ... Gradation, 112 ... Optical magnification,
114 ... Number of frames, 116 ... User data, 118
... header, 120 ... controller, 120A ... protocol control information decoding unit, 120B ...
Parameter setting unit, 120C ... Error occurrence detection unit, 12
0D ... control unit, 122 ... block detection unit, 12
4 ... Block address detection unit, 126 ... In-block data detection unit, 128 ... Parameter memory, 130 ... Second
Memory, 132 ... 2-SDU1 attached information, 134 ... In-block data, 136 ... Set standard identification code, 138
... user data format type, 140 ... block address, 142 ... block data number, 144 ... no block address compensation, 146 ... false detection marker information, 148 ... compensation marker information, 150 ... demodulation error number, 152 ... demodulation error Position information, 154 ... Controller, 154A ... 3-PCI1 protocol control information decoding unit, 154Aa ... 2-SDU1 Attachment information block detection state information determination unit, 154B ... Control unit, 156 ... Block data selection processing unit, 15
8 ... Block data link memory (memory 2 '), 1
60 ... Parameter memory, N-SDUN ... Nth Layer Service Data Unit,
No.n), N-PDUn ... Nth Layer Protocol Data Unit, No.n
PCI ... Nth Layer Protocol Control Information,
No.n), N-UDn ... N layer user data nth (Nth Laye
r User Data, No.n), ADU ... Application Data Unit, ACH ... Application Control Header
l Header).

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Imade 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Matsui Shinzo 2-43 Hatagaya, Shibuya-ku, Tokyo No. 2 Olympus Optical Co., Ltd. (72) Inventor Hiroshi Sasaki 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (56) Reference JP-A-5-109068 (JP, A) JP-A-5-298606 (JP, A) JP-A-2-37506 (JP, A) JP-A-63-83973 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G06K 7/10 G06K 7/00 G10L 13/00

Claims (10)

(57) [Claims] 1. An audio information, video information, and multimedia information including at least one of digital code data are provided in an optically readable code pattern recorded portion, and the code pattern is composed of a plurality of blocks. Each of the blocks includes a data area configured according to the content of the data of the multimedia information, a marker for defining the block, and a block address indicating the address of the block. In the information reproducing apparatus that optically reads the code pattern from the information recording medium and reproduces the original multimedia information, a reading unit that optically reads the code pattern and the same block address by the reading unit. When a block is read in duplicate, the duplicate Block data selection processing means for selecting data of any one of the blocks having the same block address, and a memory for writing the block data selected by the block data selection processing means. Information reproduction device. 2. A block detection means for detecting the block from the code pattern read by the reading means is further provided, and the block data selection processing means compares the detection state of the block by the block detection means, 2. The information reproducing apparatus according to claim 1, wherein the data of one block having a good block detection state is selected from the overlapping blocks having the same block address. 3. The block detection means includes marker detection means for detecting the marker, and the block data selection processing means compares the detection states of the markers by the marker detection means, and the overlapping same block address. 3. The information reproducing apparatus according to claim 2, wherein the data of one block with few erroneous detection markers is selected from among the blocks. 4. The block data selection processing means selects the data of the one block by comparing the number or area of the detected markers as the detection state of the marker. The information reproducing apparatus described in. 5. The block detecting means includes marker detecting means for detecting the marker, and marker compensating means for compensating the marker when the marker is not detected by the marker detecting means. The processing means compares the compensation states of the markers by the marker compensation means, and selects data of one block having less compensation markers among the blocks having the same block address which overlap with each other. Information reproducing apparatus described. 6. A block address detecting means for detecting an address of the block from a code pattern read by the reading means, wherein the block data selection processing means detects a block address by the block address detecting means. 2. The information reproducing apparatus according to claim 1, wherein the data of one block having a good block address detection state is selected from among the blocks having the same block address which are overlapped with each other. 7. The block address detecting means includes a block address error detecting means for detecting an error of the block address, and a block address compensating means for compensating a block address detected by the block address error detecting means. The block data selection processing means compares the compensation states of the block addresses by the block address compensation means, and selects data of one block having no block address compensation among the blocks of the same overlapping block address. The information reproducing apparatus according to claim 6, characterized in that. 8. An in-block data detecting means for detecting data in the block from a code pattern read by the reading means, wherein the block data selection processing means is in the block by the in-block data detecting means. 2. The information reproducing apparatus according to claim 1, wherein data detection states are compared with each other, and data of one block having a good in-block data detection state is selected from the overlapping blocks having the same block address. . 9. The in-block data detecting means includes means for detecting the demodulation error number of the in-block data, and the block data selection processing means is demodulated by the means for detecting the demodulating error number of the in-block data. 9. The information reproducing apparatus according to claim 8, wherein the number of errors is compared and the data of one block having a small number of demodulation errors is selected from the overlapping blocks having the same block address. 10. The in-block data detecting means includes means for detecting a demodulation error position of the in-block data, and the block data selection processing means demodulates by the means for detecting a demodulation error position of the in-block data. 9. The information reproducing apparatus according to claim 8, wherein the data of one block having no demodulation error is selected from among the blocks having the same block address which are duplicated by comparing the error positions.