JP2002170323A - Information recorder, information recording method and information reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information reproducing device for automatically selecting and outputting only a specific kind of information without any non- signal output or noise output caused by the discrepancy between an encoding method at the time of encoding information and an encoding method adaptive a decoding means in the case of reproducing a recording medium on which a plurality of pieces of information encorded by defining encoding methods of respective pieces of information are recorded. SOLUTION: This information reproducing device is provided with an information reading means 31, an encoding method information extracting means 33 for extracting encoding method information showing an information encoding method, a reproduction mode designating means 41 for designating an encoding method for information to be reproduced from a recording medium, and the decoding means 37 for decoding an output of the information reading means 31. The decoding means 37 decodes and outputs only information encoded by an encoding method designated by an encoding method designating means 41 among pieces of information recorded on the recording means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording apparatus and an information recording method for recording an encoded information signal, and an information reproducing apparatus for reproducing a recording medium on which encoded information is recorded. The present invention relates to an information recording apparatus provided with an encoding unit capable of encoding the information and a reproducing apparatus for a recording medium on which a plurality of pieces of information encoded by an encoding method determined for each piece of information are recorded.

[0002]

2. Description of the Related Art With the progress of digitization of information signals, various data compression techniques by coding have been developed. The encoded digital information is recorded on various recording media or broadcast on various broadcasting media. On the other hand, the compression rate of the data amount in encoding has a great influence on the data amount of digital information generated by encoding, the image quality of the reproduced image, and the sound quality of reproduced audio. That is, when the compression ratio in the encoding is increased, the data amount generally decreases, but there is a tendency that the distortion and resolution of the decoded signal deteriorate. For this reason, various coding methods have been proposed and put to practical use in order to obtain a decoded signal of the highest quality with the smallest possible code amount.

[0003] When a recording medium on which encoded digital information is recorded is sold, when a plurality of pieces of information are recorded on the recording medium, all of them are usually encoded by the same encoding method. It is common that it is. On the other hand, in the case of recording on a recording medium recordable by the operator of the recording apparatus, the quality of the reproduction signal requested by the operator, the genre (type) of information, and the signal source (source) of the information signal are required. Depending on the quality and the type of signal source equipment,
There is a request to set an encoding method for each piece of information to be recorded. In order to respond to this demand, a code that can perform a plurality of types of encoding so that a plurality of information signals encoded by different compression rates and different encoding methods can be recorded on the same recording medium. A recording apparatus provided with an image forming means has been developed. Also, an information reproducing apparatus capable of decoding a plurality of types in order to reproduce a recording medium recorded by the recording apparatus has been developed.

[0004]

However, in the above-mentioned conventional information recording apparatus, an operator sets and encodes a separate encoding method for each information to be recorded, and a plurality of the encoded plural information are recorded. When recording information on one recording medium, if an attempt is made to set an encoding method different from the encoding method of the immediately preceding encoded and recorded information, the encoding of the information or the encoding of the encoded digital information is performed. It was necessary to interrupt the recording operation and manually specify the encoding method for each piece of information.

In a conventional information reproducing apparatus, when reproducing a recording medium in which information encoded by various encoding methods is recorded on one recording medium, the information is read from the recording medium by information reading means. If the read information is information that cannot be decoded by the decoding means provided in the playback device, nothing is displayed or noise is displayed even if the read information is decoded. This phenomenon can occur whether the recorded information is music information or image information. Further, in a conventional information reproducing apparatus, recording is performed by setting an encoding method according to the type of information (genre of information) such as classical music information, light music information, speech information, and image information. When reproducing the medium, if the information is reproduced in the order of recording, information of various genres is reproduced sequentially.If only the information of a specific genre is to be reproduced, the information to be reproduced must be manually selected. Did not.

As described above, in the conventional information recording apparatus,
When a plurality of pieces of information are recorded on one recording medium, it is impossible to change the encoding method for each piece of information unless manual operation is performed. Further, in a conventional information reproducing apparatus, when information encoded by an encoding method which is not supported by the decoding means of the reproducing apparatus is reproduced, no signal is output or noise is output. It was not possible to automatically select and output only information encoded by the method. The present invention has been made in view of the above problems, and an object of the present invention is to encode a plurality of pieces of information so that the encoding method can be changed for each piece of information and record the information on a recording medium. It is an object of the present invention to provide an information recording apparatus and an information recording method which can continuously encode and record the information without manual operation. Another object of the present invention is to provide an encoding method when information is encoded when reproducing a recording medium on which a plurality of information encoded by an encoding method determined for each information is recorded. It is an object of the present invention to provide an information reproducing apparatus that automatically selects and outputs only a specific type of information without a no-signal output or a noise output due to a mismatch with an encoding method that can be handled by a decoding unit.

[0007]

Means for Solving the Theme The present invention has the following structure to achieve the above object. First
The present invention provides an encoding unit capable of encoding a plurality of types of encoding, a memory storing an encoding method table indicating an encoding method of each information to be recorded, and the encoding method table read from the memory. Control means for instructing the encoding means on an encoding method of the information to be recorded based on the recording means, and recording means for recording the digital information encoded by the encoding means on a recording medium, Means for recording, on the recording medium, a plurality of pieces of digital information encoded by a predetermined encoding method for each piece of information, the encoding indicating the encoding method of the information in a header near the head of each piece of information. An information recording apparatus records method information and information indicating a recording position of another header.

According to the first invention, an encoding method for each piece of information is set in advance for all of a plurality of pieces of information to be recorded, and then each of the pieces of information to be recorded is set based on the encoding method set for each piece of information. Since the information is encoded and recorded on the recording medium, the encoding method can be set for each information to be recorded, but the manual operation is performed from the start of the recording until the recording of all the recording target information is completed. Encoding and recording can be performed continuously without the need to set an encoding method using
Further, the recording means records a header of each information near a head of each information, and encodes information indicating an encoding method of the information and information indicating a position where another header is recorded in the header. Is recorded, when the recorded recording medium is reproduced, the encoding method for each information can be easily read, and the header of each information can be easily accessed.

According to a second aspect, in the information recording apparatus according to the first aspect, an encoding method of information having no encoding method specified among a plurality of pieces of information to be recorded is defined as an encoding method having an encoding method designated. An information recording apparatus is determined according to a recordable capacity of a recording medium which is estimated to remain after recording information.

According to the second invention, when a specific encoding method is not specified for certain information to be recorded,
When "Auto" is designated, the control unit estimates the recordable capacity remaining after recording the information for which the encoding method is designated. For example, the recordable capacity of the recording medium is large. , The encoding method of the low compression rate is automatically set for the information for which the encoding method is not specified, and when the recordable capacity of the recording medium is small, the encoding method of the high compression rate is used. Is automatically set, whereby it is possible to specify an encoding method that can obtain a reproduced signal of the highest possible quality.

According to a third aspect of the present invention, there is provided an encoding step capable of performing a plurality of types of encoding, a storage step for storing an encoding method table indicating an encoding method of each information to be recorded, and a code in the encoding step. A control step of instructing an encoding method based on the stored encoding method table;
A recording step of recording the digital information encoded in the encoding step on a recording medium, wherein in the recording step, a plurality of digital information encoded by a predetermined encoding method for each piece of information is stored in the recording medium. This is an information recording method in which, when the information is recorded, encoding method information indicating an encoding method of the information and information indicating a recording position of another header are recorded in a header near the head of each information.

According to a fourth invention, in the information recording method according to the third invention, an encoding method of information having no encoding method specified among a plurality of pieces of information to be recorded is defined as an encoding method having an encoding method designated. This is an information recording method that is determined according to the recordable capacity of a recording medium which is estimated to remain after recording information.

According to a fifth aspect of the present invention, there is provided an information reading means for reading information from a recording medium on which a plurality of pieces of information encoded by the information-based encoding method are recorded, and the information read out from the output of the information reading means. Encoding method information extracting means for extracting encoding method information indicating a method of encoding the reproduced information, reproduction mode designating means for designating an encoding method of information to be reproduced from the recording medium, and an output of the information reading means. And decoding means for decoding only information encoded by the encoding method designated by the encoding method designation means, of information recorded on the recording medium. This is an information reproducing apparatus that outputs.

According to the fifth aspect, the following effects can be obtained. That is, when reproducing information from a recording medium on which a plurality of pieces of information encoded and recorded by an encoding method determined for each information are recorded, the information is encoded by a specific encoding method designated by an operator. Only the information is reproduced. Thereby, when trying to reproduce information that cannot be decoded by the decoding means in the information reproducing apparatus, it is possible to prevent the output from becoming silent or noise. Also,
In the case of a recording medium in which an encoding method is determined for each genre or type of information and encoded and recorded, only information of a specific genre or type can be automatically selected and output.

According to a sixth aspect, in the information reproducing apparatus according to the fifth aspect, the reproduction mode designating means is configured to determine whether the encoding method designated as the reproduction mode via the operation means can be decoded by the decoding means. This is an information reproducing apparatus that determines an encoding method of information to be reproduced after checking whether or not the information is to be reproduced.

According to the sixth aspect, even if the operator erroneously designates an encoding method that cannot be decoded as the reproduction mode, it is possible to prevent the reproduction mode from being determined with the erroneous designation.

According to a seventh aspect, in the information reproducing apparatus according to the fifth or sixth aspect, a code other than the encoding method specified by the reproduction mode specifying means is included in the information read by the information reading means. The information encoded by the
This is an information reproducing apparatus that is discarded without decoding.

According to the seventh aspect, the following effects can be obtained. That is, when data that is not to be reproduced is read from the recording medium, unnecessary data is not accumulated in the buffer memory, so that more effective data can be accumulated in the buffer memory, and time is not required for access. , The interruption of the sound or the interruption of the image can be prevented.

According to an eighth aspect, in the information reproducing apparatus according to any one of the fifth to seventh aspects, an encoding method of the information output from the encoding method information extracting means and the reproduction mode designating means are provided. And a comparing unit for comparing the encoding method indicated by the reproduction mode output from the decoding unit with a signal corresponding to the comparison result to the decoding unit. An information reproducing apparatus which decodes and outputs only information whose encoding method indicated by the reproducing mode matches the encoding method of the information output from the encoding method information extracting means.

According to the eighth aspect, the following effects are obtained. That is, by comparing the encoding method of the information with the encoding method indicated by the reproduction mode by the comparing means, it is easily determined whether the information is information to be decoded, and the decoding means Only the requested information can be reliably decoded and output.

According to a ninth invention, in the information reproducing apparatus according to the eighth invention, the encoding method information extracting means detects an encoding method of the information from a header near a head of each information,
When the encoding method of the information is found to be different from the encoding method specified in the reproduction mode, the information reproducing apparatus immediately accesses the header of another information.

According to the ninth aspect, the following effects can be obtained. That is, when reproducing a recording medium that does not have an encoding method management table that collectively indicates the encoding method of each information recorded on the recording medium, the header information is simply read without analyzing the data of the information. Then, the user can quickly know the encoding method of the information, and when the information is not information of the encoding method requested to be reproduced, other information can be accessed without reading the information. In the case of accessing other information, by accessing the header of the information, the information can be accessed and the encoding method of the information can be detected at high speed.

According to a tenth aspect, in the information reproducing apparatus according to any one of the fifth to seventh aspects, information encoded by each encoding method among all information recorded on the recording medium is provided. Encoding information storage means for storing a list of information, and access control means for controlling access of the information reading means, wherein the access control means stores the list stored in the encoding method information storage means and the reproduction An information reproducing apparatus which controls the information reading means so as to sequentially access information encoded by an encoding method designated in the reproduction mode in accordance with a mode.

According to the tenth aspect, the following effects can be obtained. That is, when an encoding method management table showing a list of encoding methods of each information recorded on the recording medium is recorded on the recording medium, the reproduction mode is set based on the information of the encoding method management table. It is possible to easily extract the number of the information coded by the coding method specified by, and it is not necessary to read information other than the information requested to be reproduced.

According to an eleventh aspect, in the information reproducing apparatus according to any one of the fifth to tenth aspects, there is provided a battery remaining capacity detecting means for detecting a remaining capacity of a battery for supplying power to the apparatus. When the remaining battery charge is less than a predetermined value,
An information information reproducing apparatus wherein an encoding method designated by the reproduction mode designating means is changed to an encoding method capable of decoding and having the highest compression ratio.

According to the eleventh aspect, the following effects can be obtained. That is, in an information reproducing apparatus that is supplied with power from a battery, when reading information encoded by an encoding method with a high compression rate, the rotation speed of a spindle motor that rotates a disk can be reduced, so that power consumption is small. When the remaining capacity of the battery is reduced, the reproducible time is lengthened accordingly.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In an information recording apparatus according to the present invention, an encoding method for each information to be recorded is preset by an operator and stored in a memory as an encoding method table. The encoding method of each information is read from the memory and encoded, and the encoded digital information is recorded on a recording medium. At the time of recording, encoding method information indicating the encoding method of the information and the recording position (address) of the header of other information are recorded in a header provided near the head of each information. In this manner, information recording is performed such that a plurality of pieces of information to be recorded are continuously recorded on a recording medium without changing the encoding method, and without requiring manual operation during encoding or recording. Device.

An information reproducing apparatus according to the present invention is an information reproducing apparatus for reproducing information from a recording medium on which a plurality of pieces of information encoded by an encoding method determined for each piece of information are recorded. Encoding method information extracting means for extracting the encoding method information of the information from the output of the reading means, reproduction mode designating means for designating the encoding method relating to the information to be reproduced, and decoding the output of the information reading means Decoding means, wherein the decoding means decodes and outputs only information encoded by the encoding method designated by the encoding method designation means, of the information recorded on the recording medium. An information reproducing apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, it is assumed that a track number does not indicate a physical track number of a recording medium, but one track number is assigned to one piece of information. FIG. 1 is a block diagram showing an embodiment of the information recording apparatus of the present invention. In the information recording apparatus 10 shown in FIG.
The information to be recorded is input to the / D converter 11. A / D
The converter 11 converts the input information to a digital signal when the input information is an analog signal, and directly supplies the digital information to the memory A13 when the input information is a disk signal.
The memory A 13 stores the digital information given from the A / D converter 11, reads out the stored digital information based on a read instruction from the control unit 21, and supplies the read digital information to the encoding unit 15. The control means 21 is composed of a system control MPU for controlling the entire information recording apparatus 10 and the like.

The control means 21 has a memory C23,
The encoding method of each information to be recorded is specified in advance by the operator, and is stored in the memory C23 as an encoding method table. The control unit 21 reads out the encoding method table from the memory C23 and supplies the encoding method table to the encoding unit 15. The encoding unit 15 performs encoding according to the encoding method designated by the operator as the encoding method of the information. B17
Output to The memory B17 is a buffer memory for temporarily storing the encoded digital information. The digital information is read from the memory B17 via the control means 21 in response to a data request from the recording means 19, and is recorded on the recording medium by the recording means 19.

The control means 21 is connected to the operation means 25 and the display means 27, and the display means 27 displays the contents of the encoding method table. Further, the control unit 21 estimates the remaining amount of the recording capacity after all the information to be recorded is recorded on the recording medium, and displays it on the display unit 27. When the operator sets an encoding method for each piece of information, the operating means 25
Done through. The recording means 19 is a recording medium such as C
After a recording medium such as a D-RW is mounted, a header is added near the head of each piece of information to be recorded, and each piece of information is recorded.
Then, in each header, encoding method information indicating the encoding method of the information and the recording position (address) of the header of the information recorded immediately before or immediately after are recorded, and subsequently, the information is recorded.

FIG. 4 is a diagram showing an example of an encoding method table according to the present invention. In the figure, n indicates the order in which the operator has selected the information to be recorded, and ST (n) indicates the track number indicating the music order in the reproduction-side recording medium on which the n-th selected information is recorded. Show. In this example, the minimum recordable track on the recording medium is 5
In the case of n, when n is 1, the third track of the CD is reproduced, the information is encoded by the third encoding method, and the encoded digital information is recorded by the recording means 19 on the track of the recording side recording medium. Record in 5.

Similarly, when n is 2, the sixth track of the CD is reproduced, the information is encoded by the second encoding method, and the encoded digital information is recorded by the recording means 19 on track 6 of the recording side recording medium. To record. When n is 4, the operator selects "Auto" without specifying a specific encoding method or does not specify an encoding method. The second track of the CD is reproduced, and the information is read. After encoding, the encoded digital information is recorded on track 8 of the recording medium.
The encoding method of the information of ST (2) will be described later,
After all the information to be recorded is selected, one of the encoding methods is automatically assigned to the information in ST (2).

An apparatus for reproducing the recording medium recorded by the recording means 19 will be described later in detail. In the case of reproducing, the header recorded on the recording medium is read and each of the headers read from the recording medium is read. An information encoding method is extracted, and a decoding method suitable for the extracted encoding method is selected and decoded. The recording medium to be played is a mini disc (MD)
In the case of, the music management table (UTOC) recorded in the innermost part is read, and the encoding method of each information read by the information reading means is read from the UTOC.
A decoding method suitable for the read encoding method is selected and decoded.

In the embodiment of the information recording apparatus shown in FIG. 1, the information source is music information output from the CD reproducing means 9, and the CD reproducing means 9 is connected to the control means 21 via a control terminal.
And the reproducing operation is controlled by the control means 21. The information to be recorded by the information recording device 10 may be read out one by one from the CD reproducing means 9 and encoded and recorded on the recording medium. However, all the information to be recorded is stored in the memory A13 in advance. Even after setting an encoding method for each information, each information is read out from the memory A13, encoded, and recorded on a recording medium. However, all the information to be recorded is manually encoded during recording. Without setting, all information can be recorded continuously.

Hereinafter, each processing procedure in the information recording apparatus of the present invention will be described with reference to the drawings. FIG. 2 is a flowchart showing an encoding method setting processing procedure in the recording apparatus of the present invention. The operator selects some music pieces recorded on the CD mounted on the CD reproducing means 9 and sets the encoding method. An example of a case where the setting is made for each music piece and recorded on a recording medium mounted on the recording means 19 will be described. In FIG. 2, ST (n) indicates the track number on the recording medium on which the n-th selected information is recorded as the information to be recorded, and specifically, the CD reproducing means 9 shown in FIG. Indicates the track number of a compact disk (hereinafter, also referred to as a CD) to be reproduced.

In FIG. 2, in step S11, initialization for setting an encoding method is performed, and n is set to 1, and the process proceeds to step S13. In step S <b> 13, has an instruction to start encoding method setting been input from the operation unit 25? ,
If yes, the process proceeds to step S15, and
If so, the encoding method setting process ends. In step S15, the operator sets the reproduction track number (TNO) i
And proceeds to step S17. In step S17, does the selected playback track number i actually exist on the CD mounted on the CD playback means 9? If yes, the process proceeds to step S19, and if No, the process proceeds to step S25. In step S19, ST
(N) = i, an encoding method is set for the music of the reproduction track i, and the process proceeds to step S21. Step S2
In step 1, TNO i is associated with the specified or selected encoding method, written in the encoding method table stored in the memory C23, and the process proceeds to step S23.

In step S23, the value of n is incremented by 1 and the process proceeds to step S25. Step S25
Then, has an instruction to end the encoding method setting been input from the operation unit 25? , And if Yes, step S2
Then, if No, the process returns to step S15. In step S27, the control unit 21 estimates the remaining recording capacity of the recording medium when the recording of all the information for which the encoding method has been specified has been completed. And assigning an encoding method based on the
And the encoding method setting process ends.

FIG. 3 is a flowchart showing a recording processing procedure in the recording apparatus of the present invention, and is a flowchart of a process of encoding each information to be recorded and recording it on a recording medium by the recording means 19. In FIG. 3, in step S31, has the recording start been instructed by the operator? If yes, the process proceeds to step S33, and if no, the recording process ends. In step S33, the encoding method table is read from the memory C23, the track number (RTNO) j on the recording side is set to the minimum recordable track number of the recording medium, the selection order n is set to 1, and the process proceeds to step S35. In step S35, the encoding unit 15
Is set to the encoding method set for ST (n), and the process proceeds to step S37.

In step S37, the track number ST of the CD corresponding to the information (song) selected n-th
(N) is reproduced, encoded by the designated method, and recorded after the header information is recorded on the track of the recording side track number (RTNO) j. At this time, the recording start position of the header of the track (RTNO = j + 1) to be recorded next to the track is calculated based on the data amount of the information to be recorded on the track, and the encoding method of the information is added to the header of the track j. Information and tracks before and after the track (RTNO
Write the recording start position (address) of the header of j + 1 and j-1), and then write the recording track number (RT
(NO) Information of j is recorded, and the process proceeds to step S39.

In step S39, has the recording means been stopped by the operation means 25? If the answer is Yes, the present recording process ends, and if the answer is No, the process proceeds to step S41. In step S41, has the reproduction of the track number ST (n) on the reproducing side and the recording of the recording-side track RTNOj ended? If Yes, the process proceeds to step S43, and if No, the process returns to step S39.
In step S43, the recording-side track number RTNO j
And the value of n indicating the selection order are incremented by 1, and the process proceeds to step S45. In step S45, is there any unrecorded information among the recording target information described in the encoding method table? If yes, the process returns to step S35, and if no, the recording process ends.

Next, the information reproducing apparatus of the present invention will be described with reference to the drawings. FIG. 5 is a block diagram showing a first embodiment of the information reproducing apparatus of the present invention. Information reproducing device 3 shown in FIG.
0 indicates information reading means 31 for reading information from a recording medium on which a plurality of pieces of information encoded by an encoding method determined for each information are recorded, and access control means 39 for controlling access to the information reading means 31. Encoding method information extracting means 33 for extracting encoding method information indicating an encoding method of the read information from an output of the information reading means 31, and an encoding method of information to be reproduced from the recording medium , A decoding unit 37 for decoding the output of the information reading unit 31, an encoding method of the information output from the encoding method information extracting unit 33, and the reproduction mode designating unit 41. A comparing unit 43 for comparing the encoding method indicated by the reproduction mode output from the decoding unit 37 and providing the comparison result to the decoding unit 37;
And a microprocessor (MPU) 35 for controlling the entirety.

The reproduction mode designation means 41 has an operation means for an operator to input or select a reproduction mode, and the operator of the information reproducing apparatus 30 should reproduce the information on the reproduction mode designation means 41 via the operation means. Input or select an encoding method for the information. The encoding method information extracting means 33, the reproduction mode designating means 41 and the decoding means 37
It can also be constituted by PU35. The encoding method information extracting unit 33 extracts encoding method information indicating the encoding method of the information from the header of each information read from the recording medium, and provides the result to the comparing unit 43. MPU35 is MPU
A signal corresponding to the output of 33 is also supplied to the decoding means 37.

The reproduction mode input or selected by the operator is as follows:
This shows an encoding method when information to be output from the decoding means 37 is encoded. For example, if it is desired to output only the information encoded by MPEG2 from the decoding means 37, the operator specifies the encoding method of MPEG2 as the reproduction mode. It is assumed that the reproduction mode requested by the operator is mode K. Mode K means that the information to be output from the decoding means 37 is information that has been encoded by the encoding method K before decoding. The comparing unit 43 compares the encoding method of the information read by the information reading unit 31 with the encoding method K, and provides the result to the MPU 35. Only when the comparison means 43 matches the two encoding methods, the decoding means 37 decodes and outputs the information given from the information reading means 31, and when they do not match, gives the information given from the information reading means 31. Discard the information without decrypting it.

FIG. 8 is a flowchart showing a reproducing procedure according to the first embodiment of the information reproducing apparatus of the present invention. When the operator instructs the reproduction, each step of the flow from A to B is performed. In FIG. 8, in a step S71, it is checked whether or not the recording medium is mounted. If the recording medium is mounted, the process proceeds to a step S75, and if not, the flow ends. In step S75, is there a request to reproduce a track (information) of the specific encoding method? Is checked, and if Yes, the process proceeds to Step S77. If No, Step S75 is performed.
Return to

In step S77, the minimum recordable track number (minimum TNO) is set to the value of i, and step S78 is performed.
Proceed to. In step S78, the encoding method information RM of the track (information) is read from the recording medium.
Go to 9. In step S79, does the encoding method indicated by the requested reproduction mode match the encoding method indicated by the encoding method information RM? Is checked by the comparing means 43. If they match, the process proceeds to step S81, and if they do not match, the process proceeds to step S8.
Go to 9. In step S81, the track number (TNO)
Starts reproduction of the track i and proceeds to step S83.

In step S83, is there an instruction from the operator to stop reproduction? Is checked, and if Yes, step S8
The process advances to step S7, and if No, the process advances to step S85. In step S85, it is determined whether the reproduction of the track number i has been completed. If Yes, the process proceeds to step S89; if No, the process returns to step S83. In step S87, the reproduction is stopped, and this flow ends. In step S89, the value of i is incremented by 1 and the process proceeds to step S91. In step S91, it is checked whether or not there is a track having the track number i. If there is a track, the flow advances to step S78; otherwise, the flow ends.

Although not shown in the flowchart of FIG. 8, when the operator designates the reproduction mode, the reproduction mode designation means 41 shown in FIG. 5 takes into consideration the case where the operator makes an erroneous designation. Then, it is checked whether or not the information reproducing apparatus 30 has a decoding means corresponding to the reproduction mode designated by the operator, and the reproduction mode is determined only when the information reproducing apparatus 30 has the decoding means. Also, of the information read by the information reading means 31 shown in FIG. 5, the information encoded by an encoding method other than the encoding method designated by the reproduction mode designating means 41 is decoded by the decoding means 37. Discard without doing.

In the flowchart shown in FIG. 8, the track number is incremented by 1 in step S89, and the tracks are accessed in the order of the track number. The header information of the information (track) includes the headers of the tracks before and after the track. When the recorded position (address) is recorded, the encoding method information extracting means 33 detects the encoding method of the information from the header near the head of each information (track), If the encoding method of the information is different from the encoding method specified in the reproduction mode, the access control means 39 controls the information reading means 31 to immediately access the header of another information. Thereby, it is possible to access information (track) related to the specified reproduction mode at high speed.

Hereinafter, a second embodiment of the information reproducing apparatus according to the present invention will be described with reference to FIGS. 6 and 9. FIG. 6 is a block diagram showing a second embodiment of the information reproducing apparatus of the present invention, and FIG. 9 is a flowchart showing a reproducing procedure according to the second embodiment of the information reproducing apparatus of the present invention. The second shown in FIG.
In the information reproducing apparatus of the embodiment and the information reproducing apparatus of the first embodiment shown in FIG. 5, the elements having the same functions and the same functions are denoted by the same reference numerals, and the description thereof will be omitted. The main difference between the two devices is that in FIG. 6, the comparing means 43 is not provided and the encoding method information storing means 47 is provided. Also, the operations of the access control means 39b and the access control means 39 are different,
The operations of the encoding method information extracting means 33b and the encoding method information extracting means 33 are also different.

The information reproducing apparatus 40 shown in FIG. 6 is an example in which an encoding method management table in which encoding methods of each information (track) are collectively recorded is recorded on a recording medium. Is a music management table (UT
OC) and the like correspond thereto. When the operator gives an instruction to start reproduction, first, the access control means 39b controls the information reading means 31 so as to access a predetermined position where the encoding method management table is recorded. From the data read by the information reading means 31, the coding method management table is extracted by the coding method information extracting means 33b. Based on the information in the encoding method management table, each encoding method and the number of the information encoded by the encoding method are stored in the encoding method information storage unit 47 in association with each other. For example, track 2, track 5, and track 10 are associated with the first encoding method. Track 2, track 5, and track 10 are information encoded by the first encoding method.

If the operator specifies the first encoding method as the reproduction mode, the microprocessor (MPU)
35 is the number of the information encoded by the first encoding method from the encoding method information storage means 47 (tracks 2, 5,
10) Recognize, track 2, track 5, track 1
It instructs the access control means 39b to reproduce in the order of 0. Track 2 read by information reading means 31,
The data of the tracks 5 and 10 are sequentially decoded and output by the decoding means 37 using a decoding method corresponding to the first encoding method.

In FIG. 9, when the recording medium is loaded,
In step S73, the encoding method for each track is read from the encoding method management table, and the flow advances to step S75. Then, it is determined whether or not the operator has designated a specific encoding method as the reproduction mode (step S75). When the reproduction mode is designated by the operator, the reproduction mode (encoding method) designated by the operator is determined in step S76. After checking whether K can be decoded by the decoding means, the reproduction mode is set to K, and the flow advances to step S77. In step S77, the smallest track number (minimum TNO) among the tracks according to the specified encoding method is set as the value of i, and the flow advances to step S81.

In step S81, reproduction of the track having the track number i is started, and the flow advances to step S83. Steps S83, S85, and S87 are the same as those in FIG. In step S89b, the value of i is changed to the number of the next track to be reproduced from the tracks corresponding to the specified encoding method, and the flow advances to step S91b. In step S81b, have all the tracks in the designated reproduction mode been reproduced? If No, the process proceeds to step S81, and if Yes, the flow ends.

Hereinafter, a third embodiment of the information reproducing apparatus according to the present invention will be described with reference to FIGS. 7 and 10. FIG.
Is a block diagram showing a third embodiment of the information reproducing apparatus of the present invention, and FIG. 10 is a flowchart showing a reproducing procedure according to the third embodiment of the information reproducing apparatus of the present invention. In the information reproducing apparatus according to the third embodiment shown in FIG. 7 and the information reproducing apparatus according to the second embodiment shown in FIG. 6, the elements having the same functions and the same functions are denoted by the same reference numerals, and their description will be omitted. The main difference between the two apparatuses is that in FIG. 7, the information reproducing apparatus 50 is supplied with power from a battery, and the reproducing mode specifying means 49 includes a remaining battery capacity detecting means 49b.

The information reproducing apparatus 50 shown in FIG. 7 has an example in which an encoding method management table in which encoding methods of respective information (tracks) are collectively recorded is recorded on a recording medium as in the second embodiment. It is. In FIG. 7, a battery remaining capacity detecting means 49b detects the remaining capacity of the battery and transmits the data to the MPU.
Give 35. The MPU 35 changes the reproduction mode when the remaining capacity of the battery becomes less than a predetermined value. That is, the mode is changed to a mode in which power consumption during reproduction is lower than the reproduction mode designated by the operator. For example, if the recording medium is a disk-shaped recording medium, the encoding method is changed to a higher compression rate encoding method. This can reduce the power consumption of the spindle motor that rotates the disk-shaped recording medium when reading tracks of information compressed by a high-compression encoding method. The time can be lengthened.

In FIG. 10, first, j is set to 1 as an initial value.
To Steps S71 to S75 are the same as those in FIG. In step S76b, a list of tracks belonging to each encoding method is created, and the flow advances to step S77.
In step S77, the smallest track number (minimum TNO) among the tracks according to the specified encoding method is set as the value of i, and the flow advances to step S80b. Step S80
In b, is the battery remaining level equal to or higher than a predetermined value? If yes, the process proceeds to step S81, and if no, the process proceeds to step S80.
Proceed to c. Steps S81, S83, S85, and S87 are as described with reference to FIG.

In step S80c, if j is 1, the reproduction mode is changed from K to L, and the flow advances to step S77b.
The encoding method K is the encoding method with the highest compression rate among the encoding methods that can be decoded by the decoding means 37. In step S77b, if j is 1, the encoding method sets the minimum track number in the track of L to the value of i and sets the value of j to 2
Then, the process proceeds to step S81. In step S89b, the track number is changed as in the case of FIG.
Have all tracks in the playback mode been played back in 91b?
And if No, proceed to Step S80b, and answer Yes.
If so, the flow ends.

As described above in detail, according to the information recording apparatus and the information recording method of the present invention, an encoding method for each information is set in advance for a plurality of information to be recorded, and thereafter, an encoding method is set for each information. The information to be recorded is encoded based on the encoding method that has been performed, and a header provided near the head of each piece of information to be recorded includes encoding method information indicating the encoding method of the information and headers of other information. Record the recording position (address) and
Thereafter, since the information is recorded, from the start of recording until the recording of all information to be recorded is completed, the encoding and recording are continuously performed without the necessity of manually setting the encoding method. I can do it. In addition, it is possible to easily reproduce only information encoded by a certain encoding method specified at the time of reproduction.

According to the information reproducing apparatus of the present invention, when a plurality of pieces of information encoded and recorded by the encoding method for each information are reproduced from one recording medium, the specific code designated by the operator is used. Only the information encoded by the encoding method is reproduced. As a result, information that cannot be decoded by the decoding means in the information reproducing apparatus can be read from the recording medium, and the output can be prevented from being silent or noise. In the case of a recording medium in which an encoding method is determined for each genre and type of information and encoded and recorded,
Only information of a specific genre or type can be automatically selected and output.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the information recording apparatus of the present invention.

FIG. 2 is a flowchart showing an encoding method setting processing procedure in the recording apparatus of the present invention.

FIG. 3 is a flowchart showing a recording processing procedure in the recording apparatus of the present invention.

FIG. 4 is a diagram showing an example of an encoding method table in the recording apparatus of the present invention.

FIG. 5 is a block diagram showing a first embodiment of the information reproducing apparatus of the present invention.

FIG. 6 is a block diagram showing a second embodiment of the information reproducing apparatus of the present invention.

FIG. 7 is a block diagram showing a third embodiment of the information reproducing apparatus of the present invention.

FIG. 8 is a flowchart showing a reproducing procedure according to the first embodiment of the information reproducing apparatus of the present invention.

FIG. 9 is a flowchart showing a reproducing procedure according to a second embodiment of the information reproducing apparatus of the present invention.

FIG. 10 is a flowchart showing a reproducing procedure according to the first embodiment of the information reproducing apparatus of the present invention.

[Explanation of symbols]

 Reference Signs List 11 A / D converter 13, 17, 23 Memory 15 Encoding means 19 Recording means 21 Control means 25 Operating means 27 Display means 31 Information reading means 33, 33b Encoding method information extracting means 35 Microprocessor (MPU) 37 Decoding means 39, 39b access control means 41, 49 reproduction mode designating means 43 comparing means 47 encoding method information storage means 49b remaining battery capacity detecting means

Claims (11)

[Claims] An encoding means capable of performing a plurality of types of encoding,
A memory for storing an encoding method table indicating an encoding method of each information to be recorded, and encoding of the information to be recorded to the encoding means based on the encoding method table read from the memory; Control means for instructing a method, and recording means for recording digital information encoded by the encoding means on a recording medium, wherein the recording means is encoded by a predetermined encoding method for each information. When a plurality of digital information is recorded on the recording medium, encoding method information indicating an encoding method of the information and information indicating a recording position of another header are recorded in a header near a head of each information. An information recording device characterized by the above-mentioned. 2. An information recording apparatus according to claim 1, wherein, among a plurality of pieces of information to be recorded, an encoding method of information having no encoding method specified and all information having an encoding method designated are recorded. An information recording apparatus characterized in that it is determined according to the recordable capacity of a recording medium which is estimated to remain. 3. An encoding step capable of performing a plurality of types of encoding, a storage step for storing an encoding method table indicating an encoding method of each information to be recorded, and an encoding method in the encoding step. A control step of instructing based on the stored encoding method table, and a recording step of recording the digital information encoded in the encoding step on a recording medium. When recording a plurality of pieces of digital information encoded by the encoding method on the recording medium, the header near the head of each piece of information includes encoding method information indicating the encoding method of the information and recording positions of other headers. An information recording method characterized by recording information indicating the following. 4. The information signal encoding method according to claim 3, wherein, among a plurality of pieces of information to be recorded, an information encoding method for which no encoding method is designated, and all information for which an encoding method is designated are designated. An information recording method, which is determined according to a recordable capacity of a recording medium which is estimated to remain after recording. 5. An information reading means for reading information from a recording medium on which a plurality of pieces of information encoded by an encoding method for each information are recorded, and a code of the read information from an output of the information reading means. Encoding method information extracting means for extracting encoding method information indicating an encoding method, reproduction mode designating means for designating an encoding method of information to be reproduced from the recording medium, and decoding for decoding an output of the information reading means Means, wherein the decoding means decodes and outputs only information encoded by the encoding method designated by the encoding method designation means, among information recorded on the recording medium. Characteristic information reproducing device. 6. An information reproducing apparatus according to claim 5, wherein said reproduction mode designating means checks whether or not an encoding method designated as a reproduction mode via operation means can be decoded by said decoding means. An information reproducing apparatus comprising: determining an encoding method of information to be reproduced after the reproduction. 7. An information reproducing apparatus according to claim 5, wherein the information read by said information reading means is encoded by an encoding method other than the encoding method designated by said reproduction mode designating means. An information reproducing apparatus characterized in that encoded information is discarded without decoding. 8. The information reproducing apparatus according to claim 5, wherein said encoding method outputted from said encoding method information extracting means and said information outputted from said reproducing mode designating means are outputted. A decoding unit for comparing the encoding method indicated by the reproduction mode with a signal corresponding to the comparison result to the decoding unit, wherein the decoding unit is configured to output the signal read out by the information reading unit. An information reproducing apparatus, which decodes and outputs only information in which the encoding method of the information output from the method information extracting means matches the encoding method indicated by the reproduction mode. 9. The information reproducing apparatus according to claim 8, wherein said encoding method information extracting means detects an encoding method of the information from a header near a head of each information, and the encoding method of the information is determined. An information reproducing apparatus characterized in that when it is determined that the encoding method is different from the encoding method specified in the reproduction mode, a header of another information is immediately accessed. 10. An information reproducing apparatus according to claim 5, wherein a list of information encoded by each encoding method among all information recorded on said recording medium is stored. Encoding method information storing means for controlling the access of the information reading means, the access control means responding to the list and the reproduction mode stored in the encoding method information storing means. And controlling the information reading means so as to sequentially access information encoded by the encoding method designated in the reproduction mode. 11. The information reproducing apparatus according to claim 5, further comprising a battery remaining capacity detecting means for detecting a remaining capacity of a battery for supplying power to the information reproducing apparatus, wherein the battery remaining capacity is detected. An information information reproducing apparatus characterized in that, when is less than a predetermined value, the encoding method designated by the reproduction mode designating means is changed to an encoding method capable of decoding and having the highest compression ratio.