WO2005117014A1 - マルチメディア蓄積装置 - Google Patents
マルチメディア蓄積装置 Download PDFInfo
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- WO2005117014A1 WO2005117014A1 PCT/JP2004/007729 JP2004007729W WO2005117014A1 WO 2005117014 A1 WO2005117014 A1 WO 2005117014A1 JP 2004007729 W JP2004007729 W JP 2004007729W WO 2005117014 A1 WO2005117014 A1 WO 2005117014A1
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- multimedia
- multimedia information
- storage
- storage device
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Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
- G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
- G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/8205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/8205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal
- H04N9/8227—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal the additional signal being at least another television signal
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/10537—Audio or video recording
Definitions
- the present invention relates to a multimedia storage device that stores multimedia information in which media information such as video data and audio data are put together.
- a conventional multimedia storage device uses the same event multimedia storage when storing a plurality of pieces of multimedia information so that the multimedia information of the same event can be easily retrieved from the plurality of pieces of multimedia information.
- a common identifier is assigned to the media information (for example, see Patent Document 1).
- Patent Document 2 discloses a technique of assigning an identifier indicating an encoding method of the audio data.
- this technique does not assign an identifier to multimedia information in which a plurality of pieces of media information are put together, it is not possible to mix and store a plurality of types of media information in the same storage file.
- the present invention has been made to solve the above problems, and has as its object to provide a multimedia storage device capable of storing a plurality of pieces of multimedia information in the same storage file in a mixed manner. Disclosure of the invention
- the multimedia storage device includes an identifier determining unit that determines an identifier for identifying the multimedia information received by the information receiving unit.
- the multimedia information received by the information receiving unit and the identifier determining unit determine the identifier.
- the determined identifier is stored.
- FIG. 1 is a configuration diagram showing a multimedia system to which a multimedia storage device according to Embodiment 1 of the present invention is applied.
- FIG. 2 is a configuration diagram showing a multimedia storage device according to Embodiment 1 of the present invention.
- FIG. 3 is an explanatory diagram showing the concept of generating a stored file index file.
- FIG. 4 is an explanatory diagram showing the multimedia information, ⁇ , and ⁇ ⁇ received by the multimedia information receiving section 11.
- FIG. 5 is an explanatory diagram showing the internal structure of a storage file.
- FIG. 6 is an explanatory diagram showing the internal structure of the index file.
- FIG. 7 is an explanatory diagram showing the concept of dividing the encoded information ⁇ of the multimedia information ⁇ and the encoded information a into groups.
- FIG. 8 is an explanatory diagram showing the concept of dividing and grouping multimedia information ⁇ with reference to Timestamp of multimedia information.
- FIG. 9 is a configuration diagram showing a multimedia system to which a multimedia storage device according to Embodiment 2 of the present invention is applied.
- FIG. 10 is an explanatory diagram showing the concept of generating an accumulated file / index file.
- FIG. 11 is an explanatory diagram showing the multimedia information, a ′, ⁇ , and ⁇ , received by the multimedia information receiving unit 11.
- FIG. 12 is an explanatory diagram showing the internal structure of a storage file.
- FIG. 13 is an explanatory diagram showing the internal configuration of the index file.
- FIG. 14 shows that the multimedia storage device 5 receives and stores the multimedia information ⁇ , ⁇ , and ⁇ until time ⁇ , and after the time ⁇ , the multimedia storage device 5 stores the multimedia information ⁇ ′, ⁇ , and ⁇ .
- FIG. 9 is an explanatory diagram showing that the information is received and stored.
- FIG. 15 is an explanatory diagram showing the internal structure of a storage file. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a configuration diagram showing a multimedia system to which a multimedia storage device according to Embodiment 1 of the present invention is applied.
- Multimedia encoders 1, 2, and 3 which are multimedia information sources, compress and encode media information such as video and audio to generate multimedia information ⁇ , ⁇ , and ⁇ .
- packetization processing such as RTP (Real Time Protocol) packetization for the sender
- the communication protocol with UD PZIP User Data Protocol / Internet Protocol
- the multimedia information is transmitted.
- the communication network 4 corresponds to, for example, a network such as the Internet and a public telephone network.
- the multimedia storage device 5 receives the multimedia information, ⁇ , ⁇ transmitted from the multimedia encoding devices 1, 2, 3 via the communication network 4, and stores the multimedia information, ⁇ , ⁇ .
- FIG. 2 is a configuration diagram showing a multimedia storage device 5 according to Embodiment 1 of the present invention.
- a multimedia information receiving unit 11 performs a process of receiving multimedia information, ⁇ , and ⁇ transmitted from the multimedia encoding devices 1, 2, and 3 via the communication network 4.
- the multimedia information receiving section 11 constitutes an information receiving means.
- the identifier determining unit 12 determines an identifier for identifying the multimedia information, ⁇ , and a received by the multimedia information receiving unit 11 and also encodes the multimedia information ⁇ , ⁇ , and the encoded information A, a, and A process for determining identifiers for identifying B, b, C, and c is performed. Note that the identifier determining unit 12 constitutes identifier determining means.
- the common information extraction unit 13 extracts information common to the multimedia information ⁇ , ⁇ , key and outputs the common information as a parameter of the common header (1).
- the information common to the encoded information A, a, B, b, C, and c of the key is extracted, and the common information is extracted from the common header (2). Output as lame overnight. Also, it outputs the multimedia information ( ⁇ , ⁇ ) specific information (multimedia information from which common information has been removed).
- the grouping unit 14 divides the unique information of the multimedia information ⁇ , ⁇ , and ⁇ output from the common information extraction unit 13 at regular time intervals to perform grouping.
- the write processing unit 15 records the parameters of the common headers (1) and (2) output from the common information extraction unit 13 in the storage file, and stores the groups divided by the grouping unit 14.
- the unit records multimedia information in a storage file, and performs processing to record index information indicating the head recording position of each group and the like in the index file.
- the storage medium 16 is a memory such as a hard disk or a RAM for storing a storage file index file.
- the common information extraction unit 13, the grouping unit 14, the write processing unit 15, and the storage medium 16 constitute storage means.
- Fig. 3 is an explanatory diagram showing the concept of generating a stored file index file.
- the stored file is composed of two common headers and six groups.
- FIG. 4 is an explanatory diagram showing the multimedia information received by the multimedia information receiving unit 11, ⁇ , and.
- the multimedia information is composed of encoded information It indicates that multimedia information ⁇ is composed of coded information ⁇ and coded information b, etc., and that multimedia information is composed of coded information C and coded information c. I have.
- FIG. 5 is an explanatory diagram showing the internal structure of the storage file.
- the multimedia information ⁇ , ⁇ , ⁇ are divided at regular time intervals and divided into six groups. Is shown.
- (I) Is the coded information identifier A of the multimedia information identifier o;
- (I ') is the coded information identifier a of the multimedia information identifier,
- (II) is the coded information identifier B of the multimedia information identifier] 3,
- (II) ') Is the multimedia information identifier / 3 encoded information identifier b,
- (III) is the multimedia information identifier encoded information identifier (:, (III') is the multimedia information identifier T encoded information identifier T c is shown respectively.
- FIG. 6 is an explanatory diagram showing the internal structure of the index file.
- the total number of groups, the head recording position of the common header (1) (2), and the group (1) to (6) This indicates that index information indicating the first recording position is stored.
- the multimedia encoders 1, 2, and 3 compress and encode media information, such as video and audio, under control of a control device (not shown) or an instruction from an operator to obtain multimedia information.
- a control device not shown
- Key and performs packetization processing such as RT packetization on the multimedia information ⁇ , ⁇ , key.
- the multimedia encoders 1, 2, and 3 store the packetized multimedia information ⁇ , ⁇ , and r through the communication network 4 using a communication protocol such as UD PZI II. Send to device 5.
- a communication protocol such as UD PZI II.
- the multimedia coding apparatuses 1, 2, and 3 transmit multimedia information ⁇ , ⁇ , and ⁇ to the multimedia storage apparatus 5.
- the source of ⁇ , a is not limited to the multimedia encoders 1, 2, and 3, and it is not necessary to transmit the multimedia information ⁇ , ⁇ , and a via the communication network 4.
- the multimedia storage device 5 includes the multimedia encoding devices 1, 2, 3 Transmits the multimedia information ⁇ , ⁇ , ⁇ , the multimedia information ⁇ ;, ⁇ , ⁇ ⁇ is received, and the multimedia information ⁇ , ⁇ , ⁇ is stored.
- the multimedia information receiving unit 11 of the multimedia storage device 5 receives the multimedia information ⁇ , ⁇ , and ⁇ transmitted from the multimedia encoding devices 1, 2, and 3.
- the common information extraction unit 13 of the multimedia storage device 5 receives the multimedia information ⁇ , ⁇ , and ⁇ as shown in FIG. By comparing the information with each other, information common to the multimedia information ⁇ , ⁇ , and key is extracted, and the common information is output to the write processing unit 15 as parameters of the common header (1).
- the common information extraction unit 13 extracts, for each piece of multimedia information ⁇ , ⁇ , key, information common to the encoded information of the multimedia information (for example, profile information such as an encoding speed), The common information is output to the write processing unit 15 as a parameter of the common header (2).
- the encoded information ⁇ of the multimedia information a is compared with the encoded information a, and information common to the encoded information A and the encoded information a is extracted, and the encoded information B of the multimedia information) 3 is extracted.
- the encoded information b information common to the encoded information B and the encoded information b is extracted.
- the encoding information C and the encoding information c of the multimedia information are compared to extract information common to the encoding information C and the encoding information c.
- the common information extraction unit 13 extracts common information in order to reduce the amount of information stored in the storage file, but extracts only information that is common to all multimedia information, ⁇ , and key. Alternatively, only information common to the encoded information of each multimedia information may be extracted. Is also good.
- the common information extraction unit 13 outputs the common information to the write processing unit 15 as parameters of the common headers (1) and (2) as described above, but outputs the multimedia information ⁇ , ⁇ , and The unique information (multimedia information with the common information removed) is output to the grouping unit 14.
- the grouping unit 14 of the multimedia storage device 5 When the grouping unit 14 of the multimedia storage device 5 receives the multimedia information, ⁇ , and a unique information from the common information extraction unit 13, the grouping unit 14 converts the multimedia information ⁇ , ⁇ , and the unique information of the multimedia information for a certain time ( (For example, every 1 second) and perform grouping.
- the grouping unit 14 refers to the time information Timestam ⁇ (representing the generation time of the multimedia information, ⁇ , ⁇ ) in the header of the R ⁇ packet, and The division of the media information, ⁇ , and key is determined (the unit time of grouping (for example, 1 second)), and the encoded information having Timestam ⁇ included in the unit time is converted into the same group. Classify.
- FIG. 7 shows the concept of dividing the encoded information ⁇ of the multimedia information ⁇ and the encoded information a into groups.
- the encoded information of the multimedia information ⁇ , ⁇ , ⁇ classified into the group (1) is transmitted in the first unit time of the multimedia information ⁇ , ⁇ , ⁇ received by the multimedia information receiving unit 11. This is the encoded information of the received multimedia information ⁇ , ⁇ , ⁇ .
- the encoded information of the multimedia information ⁇ , ⁇ , ⁇ classified into the group (2) is the encoded information of the multimedia information ,, ⁇ , r received in the second unit time.
- the encoded information of the multimedia information ⁇ , ⁇ , ⁇ classified into the group (N) is the multimedia information ⁇ , received in the ⁇ th unit time.
- ⁇ , ⁇ is encoded information.
- ⁇ 3, 4, 5, 6.
- Timestamp which is time information in the header of the R ⁇ packet
- the division timing unit time (for example, 1 second) of grouping
- the determination is described, for example, when the generation time of the multimedia information is used as a reference, not only the determination of the division timing of the multimedia information ⁇ , but also the determination of the multimedia information / 3, key division timing is determined. Even in this case, the division timing of the multimedia information ⁇ , ⁇ , ⁇ may be determined with reference to the Timestamp in the header of the R ⁇ packet including the multimedia information ⁇ .
- FIG. 8 shows the concept of dividing and grouping the multimedia information
- the division timing of the multimedia information, ⁇ , and key is determined with reference to Timestamp in the header of the RTP packet.
- the division timing of the multimedia information ⁇ , ⁇ , and ⁇ may be determined by referring to the clock information of the internal clock of the media storage device 5 and the clock information extracted from the communication network 4.
- the identifier determining unit 12 of the multimedia storage device 5 determines the identifier for identifying the multimedia information, ⁇ , and Then, the identifier (multimedia information identifier ⁇ - ⁇ ) is output to the write processing unit 15 as a parameter of the common header (1).
- the identifier determining unit 12 includes the multimedia information grouped by the grouping unit 14 and the encoded information A, a, B, b, C, An identifier for identifying c is determined, and the identifier (encoded information identifiers A to C, a to c) is output to the write processing unit 15 as a parameter of the common header (2).
- the identifier determining unit 12 determines the identifier for identifying the multimedia information ⁇ , ⁇ , and the encoded information A, a, B, b, C, c (in particular, the encoded information A, a,
- the grouped encoded information is a parameter that has its own value (for example, in the RTP packet header). For example, it is more efficient to use P ay 1 oad Type. If there is no parameter whose encoding information has its own value, it must be newly created.
- the write processing unit 15 stores the parameters of the common headers (1) and (2) output from the identifier determining unit 12 and the common information extracting unit 13 in an accumulation file. And multimedia information (multimedia information identifiers ⁇ to ⁇ and coded information identifiers A to C and a to c added to each other) that are grouped by the grouping unit 14 Is recorded in the storage file.
- multimedia information multimedia information identifiers ⁇ to ⁇ and coded information identifiers A to C and a to c added to each other
- the write processing unit 15 includes the total number of groups, the head recording position of the common header (1) (2), and the head of the groups (1) to (6).
- the index information indicating the recording position is recorded in the index file.
- the head recording position indicates an offset value from the head of the storage file.
- the total number of groups is recorded at the beginning of the index file. However, it is not essential to record at the beginning, and it may be recorded at the end of the index file. May not be present in
- the write processing unit 15 generates the accumulated file and the index file. And the completed accumulation file and index file are stored in the accumulation medium 16. '
- the multimedia information receiving unit 11 is provided with the identifier determining unit 12 for determining the identifier for identifying the multimedia information received by the multimedia information receiving unit 11. Since the multimedia information received by 11 and the identifier determined by the identifier determining unit 12 are stored, the effect that a plurality of multimedia information can be mixed and stored in the same storage file is obtained. To play.
- the identifier for identifying the coded information of the multimedia information is determined.
- the multimedia information received by the multimedia information receiving unit 11 when the multimedia information received by the multimedia information receiving unit 11 is stored, the multimedia information is divided into groups at regular time intervals, and the multimedia information is stored in groups. With such a configuration, it is possible to expect an improvement in random accessibility when reproducing a stored file.
- the division timing of the multimedia information is determined by referring to the clock information of the internal part of the multimedia storage device 5. In this case, even when are generated by asynchronous clocks, a plurality of multimedia information can be recorded in the same storage file.
- the division timing of the multimedia information is determined with reference to the clock information of the communication network through which the multimedia information is transmitted. Even when generated by a synchronous clock, there is an effect that a plurality of multimedia information can be recorded in the same storage file.
- the division timing of the multimedia information ⁇ , ⁇ , ⁇ is determined with reference to Timestamp which is the time information in the header of the RTP bucket.
- the multimedia information receiving unit 11 when the multimedia information receiving unit 11 receives multimedia information from a plurality of multimedia encoding devices 1, 2, and 3, the multimedia information receiving unit 11 transmits the multimedia information from an arbitrary multimedia encoding device. Since it is configured to determine the division timing of all multimedia information with reference to the multimedia information Timestam, if multiple pieces of multimedia information are generated in a box synchronized with each other, communication This has the effect of simplifying time management in the network.
- multimedia information and the like in group units are recorded in an accumulation file, and index information indicating the head recording position of each group and the like is recorded in an index file. This has the effect of improving the random accessibility when reading and reproducing multimedia information from a file.
- the first embodiment information common to all multimedia information or information common to encoded information of each multimedia information is extracted, and the common information is stored. Since the configuration is such that the unique information of the information is stored, it is not necessary to store the common information for each multimedia information, and as a result, there is an effect that the capacity of the stored file can be reduced.
- the multimedia encoding devices 1, 2, 3 , / 3, r are transmitted to the multimedia storage device 5, but the multimedia information transmitted by the multimedia encoding devices 1, 2, 3 is shown in FIG.
- ⁇ and ⁇ ⁇ may themselves be R ⁇ buckets.
- FIG. 9 is a configuration diagram showing a multimedia system to which the multimedia storage device according to the second embodiment of the present invention is applied.
- the multimedia encoder 6 which is the multimedia information source, compresses and encodes the media information such as video and audio to generate multimedia information, and converts the multimedia information into R ⁇ packets. After carrying out the bucketing process, the multimedia information ⁇ 'is transmitted using a communication protocol such as UDPZI ⁇ .
- the switching device 7 transmits either the multimedia information ⁇ transmitted from the multimedia encoding device 1 or the multimedia information ⁇ ′ transmitted from the multimedia encoding device 6 via the communication network 4 to the multimedia storage device. Send to 5.
- FIG. 10 is an explanatory diagram showing the concept of generating a storage file and an index file.
- the switching notification information is recorded in the storage file, and the common header (2 ') is stored in the storage file. It differs from Fig. 3 in that it is recorded.
- FIG. 11 is an explanatory diagram showing the multimedia information a, a ′, ⁇ , and ⁇ ⁇ received by the multimedia information receiving unit 11.
- the multimedia information ⁇ is replaced in the middle.
- Fig. 4 is different from Fig. 4 in that multimedia information is received first.
- the multimedia information ⁇ ' is encoded It consists of information A 'and coded information a'.
- FIG. 12 is an explanatory diagram showing the internal structure of the storage file.
- the multimedia information ⁇ , ⁇ ′,] 3, and ⁇ are divided at regular time intervals into six groups. It shows that they are divided.
- (1 '' ') is the coded information identifier ⁇ ' of the multimedia information identifier H
- (I '' ') is the coded information identifier a' of the multimedia information identifier H '. Each is shown.
- FIG. 13 is an explanatory diagram showing the internal structure of the index file.
- the total number of groups, the head recording position of the common header (1) (2) (2 '), and the group This indicates that index information indicating the first recording position of 1) to (6) and the first recording position of the switching notification information is stored.
- the multimedia information ⁇ , ⁇ , r transmitted from the multimedia encoders 1, 2, 3 are received, and the multimedia information ⁇ , ⁇ , ⁇ is stored.
- the switching device 7 replaces the multimedia information ⁇ .
- a description will be given of a case in which the multimedia information ⁇ ′ transmitted from the multimedia encoding device 6 is transmitted to the multimedia storage device 5 to switch the storage target from the multimedia information ⁇ to the multimedia information ′.
- FIG. 14 shows that the multimedia storage device 5 receives and stores multimedia information ⁇ , ⁇ , and a until time T, and the multimedia storage device 5 receives and stores the multimedia information a ′, ⁇ , and a after time ⁇ .
- FIG. 9 is an explanatory diagram showing that the information is received and stored. Until time T, the multimedia information receiving unit 11 of the multimedia storage device 5 receives the multimedia information, ⁇ , and ⁇ transmitted from the multimedia encoding devices 1, 2, and 3.
- the time ⁇ is, for convenience of explanation, the time during the generation of the group (3) or the time after the generation of the group (3) (however, before receiving the multimedia information stored in the group (4)). Time).
- the common information extracting unit 13 of the multimedia storage device 5 receives the multimedia information ⁇ , ⁇ as in the first embodiment. Are compared with each other to extract information common to the multimedia information ⁇ , ⁇ , and ⁇ , and output the common information to the writing processing unit 15 as a parameter of the common header (1) (No. See Figure 10).
- the common information extracting unit 13 outputs information common to the encoded information of the multimedia information (for example, a profile such as an encoding speed, etc.) for each of the multimedia information, ⁇ , and key. ), And outputs the common information to the write processing unit 15 as parameters of the common header (2).
- the encoded information ⁇ of the multimedia information ⁇ is compared with the encoded information a, and information common to the encoded information A and the encoded information a is extracted, and the encoded information B and the encoded information B of the multimedia information S are extracted.
- the encoded information b information common to the encoded information B and the encoded information b is extracted.
- the coded information C and the coded information c of the multimedia information are compared to extract information common to the coded information C and the coded information c.
- the common information extraction unit 13 outputs the common information to the write processing unit 15 as parameters of the common header (1) (2) as described above.
- the unique information of the media information ⁇ , ⁇ , and ⁇ (multimedia information from which common information has been removed) is output to the grouping unit 14.
- the grouping unit 14 of the multimedia storage device 5 receives the unique information of the multimedia information ⁇ , ⁇ , and ⁇ from the common information extraction unit 13, the multimedia information, / 3 , Key specific information is divided at regular intervals (for example, 1 second) and grouped.
- the multimedia information is switched to ⁇ before receiving the multimedia information ⁇ contained in the group (4), so that the specific information of the multimedia information, ⁇ , and They are classified into (1) to (3).
- the identifier determining unit 12 of the multimedia storage device 5 transmits the multimedia information ⁇ , as in the first embodiment. , ⁇ , and ⁇ are determined, and the identifier (multimedia information identifier ⁇ to ⁇ ) is output to the write processing unit 15 as a parameter of the common header (1).
- the identifier determining unit 12 determines an identifier for identifying the encoded information A, a, B, b, C, c of the multimedia information ⁇ ;, ⁇ , ⁇ , which is grouped by the grouping unit 14. Then, the identifiers (encoded information identifiers A to C, a to c) are output to the write processing unit 15 as parameters of the common header (2).
- the write processing unit 15 accumulates the parameters of the common headers (1) and (2) output from the identifier determination unit 12 and the common information extraction unit 13.
- the multimedia information recorded in a file and grouped by the grouping unit 14 (multi-media information identifiers ⁇ to ⁇ and encoding information identifiers A to C and a to c Information) is recorded in the storage file.
- the write processing unit 15 includes the total number of groups, the head recording position of the common headers (1) and (2), and the groups (1) to (1). 3) Record the index information indicating the start recording position of) in the index file.
- the multimedia information receiving unit 11 of the multimedia storage device 5 receives the multimedia information ⁇ ′, ⁇ , and ⁇ transmitted from the multimedia encoding devices 6, 2, and 3.
- the common information extraction unit 13 of the multimedia storage device 5 converts the multimedia information transmitted from the switching device 7 into the multimedia information. It detects that it has been switched to ⁇ ′, and outputs switching notification information indicating that to the writing processing unit 15.
- the common information extracting unit 13 compares the multimedia information ⁇ ′, ⁇ , and ⁇ with each other, extracts information common to the multimedia information ⁇ ′, ⁇ , and ⁇ , and uses the common information as a common header. It is output to the write processing unit 15 as a parameter of (2 ') (see FIG. 10).
- the common information extraction unit 13 extracts information common to the coded information A ′ and a ′ of the multimedia information ⁇ ′ (for example, profile information such as coding speed) and converts the common information to a common header. It is output to the write processing unit 15 as the parameter of (2 ').
- the parameter of the common header (2 ') is common information newly extracted when the multimedia information ⁇ is switched to the multimedia information ⁇ '. If the common information does not change even if it is switched to ⁇ ', it is not necessary to output the parameters of the common header (2') to the write processing unit 15.
- the common information extracting unit 13 converts the common information into the common header ( 2 ') is output to the write processing unit 15, but the multimedia information, the unique information of ⁇ , and key (multimedia information from which common information has been removed) are output to the duplication unit 14. I do.
- the grouping unit 14 of the multimedia storage device 5 When the grouping unit 14 of the multimedia storage device 5 receives the unique information of the multimedia information ', ⁇ ' from the common information extracting unit 13, the grouping unit 14 converts the unique information of the multimedia information ',,, , 1 second) and divide into groups.
- the multimedia information ⁇ ′, ⁇ , key Information is classified into groups (4) to (6).
- the identifier determining unit 12 of the multimedia storage device 5 determines the identifier for identifying the multimedia information', ⁇ , ⁇ . Then, the identifier (multimedia information identifier ⁇ 'to ⁇ ) is output to the write processing unit 15 as a parameter of the common header (2').
- the identifier determining unit 12 is an identifier for identifying the multimedia information ⁇ ′, ⁇ , ⁇ encoding information A ′, a ′, B, b, C, c, which is grouped by the grouping unit 14. Is determined, and the identifiers (encoded information identifiers A ′ to C, a, to c) are output to the write processing unit 15 as parameters of the common header (2,).
- the write processing unit 15 records the switching notification information output from the common information extraction unit 13 in the storage file, and then stores the identifier determination unit 12 and The parameters of the common header (2 ') output from the common information extracting unit 13 are recorded in the storage file, and the multimedia information (ma- trix) in group units divided by the grouping unit 14 is recorded.
- the multimedia information identifiers ⁇ ′ to ⁇ and the coded information identifiers A ′ to C and a ′ to c are added to the storage file.
- the write processing unit 15 includes a head recording position of the switching notification information, a head recording position of the common header (2 ′), and a group (4).
- the index information indicating the start recording position of (6) to (6) is recorded in the index file.
- index information indicating the head recording position of the switching notification information and the head recording position of the common header (2 ') is recorded between the group (3) and the group (4).
- index information indicating the head recording position of the switching notification information and the head recording position of the common header (2 ') is recorded between the group (3) and the group (4).
- the switching notification information is recorded in the storage file.
- the multimedia information before and after the switching is switched.
- the profile information is different, the profile information of the multimedia information ⁇ 'after the switching is recorded in the storage file in addition to the profile information of the multimedia information ⁇ before the switching. Even if the attribute of the media information is different, the effect that the decryption process can be continued during playback Play.
- index information indicating the head recording position of each group is stored.
- the information may be recorded in the storage file.
- the total number of groups, the head recording position of the common header (1), the head recording position of the common header (2), the head recording position of the common header (2 '), the head recording positions of groups (1) to (6), Instead of generating index information indicating the head recording position of the switching notification information as an independent index file, it manages it on the primary memory in parallel with the generation of the storage file.
- the index information is recorded at the end of the storage file.
- the format of the index information is not specified, as is the case with the format of the index file.
- multimedia information and the like in group units are recorded in the storage file, and index information indicating the head recording position of each group and the like is recorded in the storage file.
- the related information (for example, profile information) of the multimedia information that can be obtained when the multimedia information receiving unit 11 starts to receive the multimedia information includes the common header (1) ( 2) Record at the beginning of the stored file as Since the related information (for example, index information) of the multimedia information that can be obtained during reception of the multimedia information by the receiving unit 11 or at the end of the reception is recorded at the end of the storage file, for example,
- the related information for example, index information
- the multimedia storage device is, for example, a multimedia storage device that receives multimedia information transmitted from a multimedia encoding device and needs to temporarily store the multimedia information before reproducing the multimedia information. It is suitable for use in a decoding device or the like.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
- Management Or Editing Of Information On Record Carriers (AREA)
Abstract
Description
Claims
Priority Applications (2)
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PCT/JP2004/007729 WO2005117014A1 (ja) | 2004-05-28 | 2004-05-28 | マルチメディア蓄積装置 |
JP2006519183A JP4350751B2 (ja) | 2004-05-28 | 2004-05-28 | マルチメディア蓄積装置 |
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PCT/JP2004/007729 WO2005117014A1 (ja) | 2004-05-28 | 2004-05-28 | マルチメディア蓄積装置 |
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WO2005117014A1 true WO2005117014A1 (ja) | 2005-12-08 |
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PCT/JP2004/007729 WO2005117014A1 (ja) | 2004-05-28 | 2004-05-28 | マルチメディア蓄積装置 |
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JP (1) | JP4350751B2 (ja) |
WO (1) | WO2005117014A1 (ja) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0378166A (ja) * | 1989-08-22 | 1991-04-03 | Nippon Hoso Kyokai <Nhk> | データ記録方式 |
JPH1032789A (ja) * | 1996-05-13 | 1998-02-03 | Oki Inf Syst | 映像データ蓄積再生装置 |
JPH10222932A (ja) * | 1997-02-03 | 1998-08-21 | Matsushita Electric Ind Co Ltd | データ処理方法およびデータ処理システム |
JP2000224535A (ja) * | 1999-01-27 | 2000-08-11 | Sanyo Electric Co Ltd | 動画像再生装置 |
JP2003069971A (ja) * | 2001-08-23 | 2003-03-07 | Matsushita Electric Ind Co Ltd | 蓄積型データ放送システム |
JP2003209803A (ja) * | 2002-01-11 | 2003-07-25 | Pioneer Electronic Corp | 情報記録装置及び方法、情報再生装置及び方法、情報記録用プログラム及び情報再生用プログラム、記録媒体並びに情報記録媒体 |
JP2003283996A (ja) * | 2002-03-25 | 2003-10-03 | Sanyo Electric Co Ltd | タイムスタンプ付与装置およびそれを用いたデジタル録画装置 |
JP2003331520A (ja) * | 2002-03-05 | 2003-11-21 | Sanyo Electric Co Ltd | 情報記録装置、情報再生装置、情報記録方法、情報再生方法、情報記録用プログラム及び情報再生用プログラム並びに情報記録媒体 |
-
2004
- 2004-05-28 JP JP2006519183A patent/JP4350751B2/ja not_active Expired - Fee Related
- 2004-05-28 WO PCT/JP2004/007729 patent/WO2005117014A1/ja active Application Filing
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0378166A (ja) * | 1989-08-22 | 1991-04-03 | Nippon Hoso Kyokai <Nhk> | データ記録方式 |
JPH1032789A (ja) * | 1996-05-13 | 1998-02-03 | Oki Inf Syst | 映像データ蓄積再生装置 |
JPH10222932A (ja) * | 1997-02-03 | 1998-08-21 | Matsushita Electric Ind Co Ltd | データ処理方法およびデータ処理システム |
JP2000224535A (ja) * | 1999-01-27 | 2000-08-11 | Sanyo Electric Co Ltd | 動画像再生装置 |
JP2003069971A (ja) * | 2001-08-23 | 2003-03-07 | Matsushita Electric Ind Co Ltd | 蓄積型データ放送システム |
JP2003209803A (ja) * | 2002-01-11 | 2003-07-25 | Pioneer Electronic Corp | 情報記録装置及び方法、情報再生装置及び方法、情報記録用プログラム及び情報再生用プログラム、記録媒体並びに情報記録媒体 |
JP2003331520A (ja) * | 2002-03-05 | 2003-11-21 | Sanyo Electric Co Ltd | 情報記録装置、情報再生装置、情報記録方法、情報再生方法、情報記録用プログラム及び情報再生用プログラム並びに情報記録媒体 |
JP2003283996A (ja) * | 2002-03-25 | 2003-10-03 | Sanyo Electric Co Ltd | タイムスタンプ付与装置およびそれを用いたデジタル録画装置 |
Also Published As
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JPWO2005117014A1 (ja) | 2008-04-03 |
JP4350751B2 (ja) | 2009-10-21 |
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