WO2004068353A1 - 情報処理装置、および情報処理方法、並びにコンピュータ・プログラム - Google Patents
情報処理装置、および情報処理方法、並びにコンピュータ・プログラム Download PDFInfo
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- WO2004068353A1 WO2004068353A1 PCT/JP2003/016083 JP0316083W WO2004068353A1 WO 2004068353 A1 WO2004068353 A1 WO 2004068353A1 JP 0316083 W JP0316083 W JP 0316083W WO 2004068353 A1 WO2004068353 A1 WO 2004068353A1
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Classifications
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Definitions
- the present invention relates to an information processing apparatus, an information processing method, and a computer program. More specifically, in a configuration in which various types of data transmission / reception, such as MPEG and ATRAC, are performed between devices connected to the network, the data format of the original content held by the server that executes the content providing process
- the present invention relates to an information processing apparatus, an information processing method, and a computer program that enable an optimal content selection process in a client by notifying information to the client.
- Background Art With the spread of data communication networks in recent years, the so-called home network, which allows home appliances, computers, and other peripheral devices to be connected to each other in a network and enables communication between devices, is spreading. .
- the home network provides convenience and comfort to users, such as sharing data processing functions of each device by communicating between network-connected devices and transmitting and receiving content between devices. It is expected that it will become more and more popular in the future.
- Universal Plug and Play (UPnP) is known as a protocol suitable for such a home network configuration.
- Universal Plug and Play (UP n P) enables a network to be easily constructed without complicated operations. The service provided can be received. UP n P is 0 S (operation It has the advantage that devices can be easily added without relying on a single system.
- UPnP exchanges definition files compliant with XML (extensible Markup Language) between connected devices, and performs mutual recognition between devices.
- XML extensible Markup Language
- Service request processing for requesting a service from each device based on the information acquired in the discovery processing.
- the device newly connected to the network acquires the device ID by the above-mentioned addressing process, acquires the information of other devices connected to the network by the discovery process, and communicates with other devices based on the acquired information.
- Service requests can be made. For example, in the case where content such as music data and image data stored in the server is to be played back on the client device, the content information stored in the server from the client side to the server, for example, a song or movie.
- the server sends metadata (attribute information) related to the content held by the server to the client in response to a request from the client.
- the client The content information is displayed on the display of the client device according to a predetermined display program based on the metadata obtained from the server. For example, a song list including an artist name, a title, and the like is displayed on the display.
- the user confirms or selects the reproduction target content based on the display information, and transmits a content transmission request to the server.
- the server receives the content request from the client, the server sends the content to the client in response to the reception request, and the client plays back the received content.
- the content stored in the server in the home network can be accessed from other devices connected to the network.
- content can be acquired by a device that has performed the UPnP connection that is the simple device connection configuration described above. If the content is movie data or music data, it is possible to watch movies and listen to music by connecting a TV or player as a network connection device.
- Various contents such as music and image data are usually transmitted and received between devices as coded data in various modes, and are stored in a storage unit of each device.
- ATRAC3 adaptive transform acoustic coding3, ATRAC3plus
- MPEG1 moving picture experts group UMPEG2, MPEG4, etc.
- a server that provides content to a client stores content received via a tuner or original content input from a storage medium such as a CD or DVD in its own storage device as necessary, Executes content provision processing via the network in response to the request.
- this content providing process it is necessary to provide the client device with data processing, that is, providing encoded data corresponding to the data decoding function.
- the data conversion unit performs data conversion of the original content and provides the converted data to various clients.
- Patent Document 1 Patent Publication 2 0 0 2 — 7 7 8 5
- Patent Literature 1 discloses an efficient transcode, that is, a data conversion process that automatically selects data according to the encoding format information of the content held by the content server and the data format information that can be decoded by the client.
- the configuration of the data access server that executes the conversion processing is shown.
- the present invention has been made in view of the above-described problems in the related art, and enables a client to acquire data mode information of an original content held by a server that stores content.
- the information processing device, the information processing method, and the computer program that enable the client to specify the content to be received and reproduced from the server as the original content, thereby enabling the client to reproduce the data with high quality. aimed to.
- a first aspect of the present invention
- An information processing device serving as a content providing server that executes content transmission processing in response to a request from a client
- a storage unit that stores metadata as content and content attribute information
- a data transmission / reception unit that executes data transmission / reception processing
- a control unit that extracts metadata from the storage unit based on the reception of the content information acquisition request from the client and generates content information to be transmitted to the client based on property information that is a component of the metadata.
- the storage unit has
- the control unit includes:
- An information characterized by generating content information including data mode information of original content held by a server based on receipt of a content information acquisition request from a client, and transmitting the generated content information via the data transmission / reception unit.
- the storage unit includes file format information as code mode information of original content held by the server, codec information as an encoded data mode, and resolution. At least one of the information is stored as property information corresponding to the content, and the control unit stores at least one of the file format information, the codec information as an encoded data mode, and the resolution information. It is characterized in that it has a configuration for generating content information including the content information and transmitting the generated content information via the data transmitting / receiving unit.
- the storage unit further stores data mode information of content that can be provided from the server to the client as property information corresponding to the content
- the control unit includes: It is characterized in that content information including data mode information of content that can be provided from a server to a client is generated and transmitted through the data transmission / reception unit.
- the data form information of the content that can be provided to the client is at least one of file format information, codec information as encoded data form, and resolution information. The information is characterized by including.
- control unit transmits XML (extended Markup Language) data composed of content information including data mode information of original content held by the server to the client. It is characterized in that it is configured to execute processing for generating as transmission data.
- XML extended Markup Language
- a second aspect of the present invention is:
- An information processing device serving as a client that issues a content transmission request to the content providing server, A data transmission / reception unit that executes data transmission / reception processing with the content providing server; a control unit that generates display information to be displayed on the output unit based on the content information received from the server via the data transmission / reception unit;
- a display unit for outputting and displaying the display information generated by the control unit
- the control unit is configured to execute a process of generating display information in a form in which the data form information of the original content held by the server included in the property information as a component element of the content information received from the server can be identified.
- An information processing apparatus characterized by the above.
- the data format information of the original content includes file format information of the original content held by the server, codec information as an encoded data format, and resolution information.
- the control unit is configured to execute a process of generating display information capable of identifying original content data information for at least one of file format information, codec information, and resolution.
- the control unit includes, in the generated display information, data content information of content that can be provided from the server to the client and that is included in the property information received from the server.
- the present invention is also characterized in that, based on the processing function information of the client device, a process of generating display information that enables the client to determine whether or not processing is possible for each data mode information is performed.
- the data form information of the content that can be provided to the client is at least one of file format information, codec information as encoded data form, and resolution information.
- the control unit is capable of identifying whether or not the client can process at least one of file format information, codec information, and resolution.
- control unit executes a process of generating display information by analyzing XML (extended Markup Language) data composed of content information received from a server. It is characterized by Further, a third aspect of the present invention provides
- An information processing device serving as a client that issues a content transmission request to the content providing server
- a data transmission / reception unit that executes a data transmission / reception process with the content providing server; and data of the original content held by the server included in the property information as a component of the content information received from the server via the data transmission / reception unit
- the data transmission / reception unit determines the transmission data mode from the server based on the mode information, the data mode information of the content that can be provided from the server to the client, and the processing function information of the client device, and transmits a content transmission request accompanied by the determination information.
- the control unit when the data mode information of the original content held by the server is a data mode that can be processed by the client device, the control unit may include the original content. Is determined as the transmission data form from the server, and if the data form information of the original content held by the server is not a data form that can be processed by the client device, the data form is determined according to the predetermined setting information. It is characterized in that it is configured to execute a process of determining a data mode which is a data mode that can be processed by the client device and is close to the data mode of the original content as a data mode transmitted from the server.
- the data mode information of the original content includes file format information of the original content held by the server, codec information as an encoded data mode, and resolution information.
- the control unit includes at least one of them, and the control unit is configured to execute a process of determining at least one of file format information, codec information, and resolution as a transmission data form from the server.
- a content information acquisition request receiving step of receiving a content information acquisition request from the client
- the data format information of the original content held by the server is extracted from the storage unit as property information constituting the metadata corresponding to the content, and the content to be transmitted to the client based on the property information including the data format information of the original content.
- An information processing method comprising: Further, in one embodiment of the information processing method according to the present invention, the storage unit includes file format information as data mode information of original content held by the server, and a codec as encoded data mode. At least one of the information and the resolution is stored as property information corresponding to the content, and the content information generating step includes the steps of: file format information, codec information as an encoded data mode, and resolution information It is characterized by generating content information including at least one of the above. Further, in one embodiment of the information processing method of the present invention, the storage unit further stores data mode information of content that can be provided from the server to the client.
- the content information is stored as property information corresponding to the content, and the content information generating step generates content information including data mode information of content that can be provided from the server to the client.
- the data form information of the content that can be provided to the client includes at least any of file format information, codec information as encoded data form, and resolution information.
- the information is characterized by including
- the content information generating step includes transmitting XML (extended Markup Language) data composed of content information including data mode information of the original content held by the server to the client. It is characterized by executing processing to generate data.
- XML extended Markup Language
- the data format information of the original content includes file format information of the original content held by the server, codec information as a coded data format, and resolution information.
- the display information generating step includes the step of generating at least one of file format information, codec information, and resolution. It is characterized in that display information generation processing for making the original content data information identifiable is executed. Further, in one embodiment of the information processing method of the present invention, the display information generating step includes, in the generated display information, data mode information of content that can be provided from the server to the client, which is included in the property information received from the server.
- the data mode information of the content that can be provided to the client includes at least one of file format information, codec information as an encoded data mode, and resolution information.
- the display information generating step includes performing a display information generating process that makes it possible to identify whether or not the client can perform processing on at least one of file format information, codec information, and resolution.
- the display information generation step includes a process of generating display information by analyzing XML (extended Markup Language) data composed of content information received from a server. Is performed. Further, a sixth aspect of the present invention provides
- the data form information of the original content held by the server included in the property information as a component of the content information received from the server, the data form information of the content that can be provided from the server to the client, and the client A transmission data mode determining step of executing a transmission data mode determination process from the server based on the processing function information of the client device;
- the transmitting data mode determining step includes the step of, when the data mode information of the original content held by the server is a data mode that can be processed by the client device.
- the data format of the original content is determined as a data format transmitted from the server. If the data format information of the original content held by the server is not a data format that can be processed by the client device, the client determines the data format of the original content in accordance with the predetermined setting information. It is characterized by executing a process of determining a data mode that is a data mode that can be processed by the device and is close to the data mode of the original content as a data mode to be transmitted from the server.
- the data format information of the original content includes file format information of the original content held by the server, codec information as an encoded data format, and resolution information.
- the transmitting data mode determining step executes a process of determining at least one of file format information, codec information, and resolution as the transmitting data mode from the server.
- the data format information of the original content held by the server is extracted from the storage unit as property information constituting the metadata corresponding to the content, and transmitted to the client based on the property information including the data format information of the original content.
- an eighth aspect of the present invention provides
- a computer program that executes a process of displaying content information, the method comprising: receiving content information from a server;
- the computer is characterized by having a program. Further, a ninth aspect of the present invention is a
- a computer program that executes a transmission content data mode determination process based on the content information
- the data form information of the original content held by the server specifically, the file format information is added to the property information constituting the meta information which is the attribute information corresponding to the content. It stores codec information and resolution information as encoded data forms, and generates content information including the data form information of the original contents held by the server based on the reception of the content information acquisition request from the client.
- the client is required to determine the optimal data format based on the data format information of the original content held by the server, and make a content transmission request specifying the data format.
- the client device that issues a content transmission request to the content providing server, the data mode of the original content held by the server included in the property information as a component of the content information received from the server Since the display information is generated in a form that allows the information to be identified and displayed on the client display, the user can provide the data form information of the original content and the server to the client based on the display information. This makes it possible to determine the data mode information of various contents, and to easily determine the optimum data mode and output a content transmission request to the server.
- the computer program of the present invention is, for example, a storage medium or a communication medium provided in a computer-readable format to a general-purpose computer system capable of executing various program codes, for example, a storage medium such as a CDFD and an MO. It is a computer program that can be provided via a medium or a communication medium such as a network. By providing such a program in a computer-readable format, processing corresponding to the program is realized on a computer system. Further objects, features, and advantages of the present invention will become apparent from a more detailed description based on embodiments of the present invention described below and the accompanying drawings.
- a system is a logical set of a plurality of devices, and the devices of each configuration are not limited to those in the same housing.
- FIG. 2 is a diagram illustrating a configuration example of a network connection device.
- FIG. 3 is a diagram for explaining a processing sequence between the server and the client in the content data reproduction processing.
- FIG. 4 is a diagram illustrating a processing sequence between a server and a client regarding selection of a content data mode based on property information and transmission / reception of content.
- FIG. 5 is a diagram illustrating a class that can be used as specification information of property information transmitted to a server.
- FIG. 6 is a diagram for explaining property information constituting metadata set in correspondence with content data.
- FIG. 7 is a diagram for explaining property information constituting metadata set in correspondence with content data.
- FIG. 8 is a diagram showing a permissible value of a codec in property information.
- FIG. 9 is a diagram showing an example of display information displayed on the client based on property information transmitted from the server to the client.
- FIG. 10 is a diagram showing an example of display information displayed on the client based on property information transmitted from the server to the client.
- FIG. 11 is a flowchart illustrating a processing procedure for determining a transmission data mode, a content request, and receiving based on property information transmitted from the server to the client.
- FIG. 12 is a flowchart illustrating a processing procedure for determining a transmission data mode, a content request, and receiving based on property information transmitted from the server to the client.
- FIG. 13 is a block diagram illustrating the processing functions of the server.
- FIG. 14 is a block diagram illustrating the processing functions of the client. BEST MODE FOR CARRYING OUT THE INVENTION
- details of an information processing apparatus, an information processing method, and a computer program of the present invention will be described with reference to the drawings.
- FIG. 1 shows a server 101 that executes processing in response to processing requests from various client devices, and a client device that performs processing requests to the server 101.
- the figure shows a configuration in which a PCI 21 as a device, a monitor 122, a mobile phone 123, a playback device 124, and a PDA 125 are connected via a network 100, for example, a home network configuration.
- a network 100 for example, a home network configuration.
- Various other electronic devices and home appliances can be connected as client devices.
- the processing executed by the server 101 in response to a request from the client includes, for example, provision of content stored in a storage device such as a hard disk held by the server 101, or an application program executable by the server.
- the server 101 and the client device are distinguished from each other, but a device that provides a service in response to a request from a client is shown as a server. However, when providing its own data processing service to other clients, it can provide the function as a server. Therefore, the client device connected to the network shown in FIG. 1 can also be a server.
- the network 100 is a network such as a wired network or a wireless network, and each connection device transmits and receives communication packets such as Ethernet (registered trademark) frames via the network 100. That is, the client executes a data processing request to the server 101 by transmitting a frame in which the processing request information is stored in the data portion of the Ethernet frame to the server 101.
- Ethernet registered trademark
- the server 101 executes data processing in response to the reception of the processing request frame, stores result data as a result of the data processing in the data part of the communication packet as necessary, and transmits the data to each client.
- the network connection device is configured by, for example, a device that supports Universal Plug and Play (UPnP: Universal Plug and Play). Therefore, it is easy to add and delete connected devices to the network. Devices that newly connect to the network
- a search paris process that searches for devices on the network, receives responses from each device, and obtains information such as device types and functions contained in the responses.
- FIG. 2 An example of a hardware configuration of a PC will be described with reference to FIG. 2 as an example of an information processing device constituting the server and the client device shown in FIG.
- the CPU (Central Processing Unit) 201 executes various types of processing in accordance with programs stored in ROM (Read Only Memory) 202 or HDD 204, etc., and executes data processing means or communication. Functions as control processing means.
- the RAM 203 stores programs and data to be executed by the CPU 201 as appropriate.
- the CPU 201, the ROM 202, the RAM 203, and the HDD 204 are connected to each other via a bus 205.
- An input / output interface 206 is connected to the bus 205.
- the input / output interface 206 includes, for example, an input constituted by a keyboard, switch, button, mouse, or the like operated by a user.
- Unit 207 is connected to an output unit 208 composed of LCD, CRT, speed, etc.
- FIG. 2 is a server as an example of the network connection device shown in FIG. 1, although this is an example of a personal computer (PC), the network connection device is not limited to a PC, but as shown in Fig. 1, a mobile communication terminal such as a mobile phone, PDA, and other various electronic devices such as a playback device and a display. It can be configured by an information processing device. Therefore, it is possible to have a hardware configuration unique to each device, and execute processing according to the hardware.
- a communication unit 209 functioning as a data transmission / reception means, and a removable recording medium 211 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory can be mounted thereon.
- a drive 210 for executing a process of reading or writing data from is connected.
- the configuration shown in FIG. 2 is a server as an example of the network connection device shown in FIG. 1, although this is an example of a personal computer (PC), the network connection device is not limited to a PC, but as shown in
- the server holds, as metadata, attribute information corresponding to each content such as image data such as still images and moving images and audio data such as music stored in its storage unit.
- the contents of the server such as image data such as still images and moving images, and audio data such as music, are collectively referred to as AV contents.
- AV content is managed by a content directory having a hierarchical structure.
- the content directory has a hierarchical structure composed of individual AV contents or folders storing a plurality of AV contents.
- Each element of the content directory that is, each AV content or each folder storing a plurality of AV contents is called an object.
- an object is a generic term for a data unit processed by the server, and there are various objects other than individual AV contents or a folder storing a plurality of AV contents.
- the minimum unit of AV content that is, one piece of music data, one piece of moving image data, one piece of still image data, and the like are called items.
- Objects are classified into classes according to their type, for example, music (Audio), video (Video), photo (Photo), etc. T JP2003 / 016083
- Metadata is a variety of management information including attribute information corresponding to the content held by the server, class definition information, information on the hierarchical configuration of the content directory, and the like.
- the metadata as content attribute information defined in association with each object includes various information such as content identifier (ID), data size, resource information, title, artist name, copyright information, etc. Information is included.
- Each piece of information included in the metadata is called a property. It should be noted that, for each class described above, metadata having properties such as music (Audio), video (Video), photograph (Photo), etc., is defined in advance.
- a client who wants to play back content can make a content request to the server, receive the requested content from the server, and play back the content.
- the general procedure of content playback will be described with reference to FIG.
- the client requests acquisition of content information held by the server.
- the server generates content information such as a title and an artist name based on the content-aware metadata according to the client's request.
- the client displays the content information on the display in accordance with the received XML information.For example, in the case of music content, a song name, an artist name, and a reproduction name corresponding to a plurality of music held by the server. It is displayed as a list consisting of time and so on.
- step S14 the client selects music to be received and reproduced from the server in the client device, and transmits content specifying information (for example, content ID) to the server.
- the server acquires the content from the storage unit based on the received content designation information and transmits the content.
- step S16 the client plays the content received from the server. If the content has been subjected to ATRAC, MPEG, or other compression processing, playback processing is performed after the client performs decryption processing.
- the normal content reproduction procedure is as described above.
- the client can obtain various content attribute information, that is, property information included in metadata corresponding to content held by the server.
- the original data information of the content is set as property information as a component of metadata corresponding to the content stored in the server.
- the server transmits information on the original data of the content, specifically, data format information such as a file format, codec information, and resolution information on the original data. Offer to clients.
- the original data is data obtained from the server externally, for example, from a broadcast medium, a network, or a storage medium such as a DVD or CD, and is converted by a data conversion means such as an encoding / decoding means in the server. The data has not been processed.
- the client can know the data form that can be provided by the server and the data form of the original data held by the server.
- the client lists each of these information, for example The content list that has been overridden is displayed on the display. An example of the display data will be described later.
- the user selects the data format (file format, codec information, resolution information, etc.) of the content to be received and played from the server based on the content list displayed on the display, and transmits the selected data format information to the server.
- the server obtains the transmission data from the storage unit based on the specification of the client, and executes data conversion processing by using a codec function for performing file format conversion and encoding / decoding as necessary.
- the content data in the desired data format is transmitted to the client.
- step S21 the client makes a request for content information held by the server.
- the command [X—GETS chema] is sent to the server.
- the command [X—GETS chema] is a command that can be interpreted by the devices that make up the system of the present invention, and the server that receives the command configures metadata corresponding to various objects such as contents according to the request. Generates XML data based on the property information to be sent and sends it to the client.
- the client can specify which object, that is, what kind of content to acquire the property information. For example, one of the classes described above, such as music (Audio), video (Video), and photo (Photo), is designated, and a request to acquire property information of an object included in the designated class is executed. In this case, the command W
- classes are managed in a hierarchical structure, and subclasses can be set as child classes of one class.
- various classes are set for music-related classes.
- classes as shown in FIG. 5 are set as music-related classes.
- various classes are set, such as songs, albums, genres, and albums with multiple albums.
- the client specifies these classes and specifies the command as the property information acquisition request described above.
- the property information of the content corresponding to the specified class can be obtained.
- classes are classified in various ways, and a user can specify an arbitrary class and acquire property information of the specified class.
- Music content and image content are stored in various forms on a server. That is, compressed data modes such as ATRAC3, ATRAC3p1us, MPEG2 and MPEG4 are different depending on the stored content. Also, the recording quality of content, the so-called record quality level, is different.
- each client device has a different data mode that can be processed by its own device. It is preferable that each client receives the highest quality data that can be processed in its own device and performs the reproduction process.
- the server Upon receiving the property information acquisition request from the client, the server acquires, for example, the corresponding metadata of the content corresponding to the specified class from the storage unit, and transmits the property to the client based on the acquired metadata. Generate XML data including security information.
- the server is shown in the sequence diagram in Figure 4.
- the generated XML data is transmitted to the client.
- the property information transmitted from the server to the client includes information on the data form that can be provided by the server and the data form of the original data held by the server.
- the server generates XML data based on the content information including this information and sends it to the client.
- the server has various property information as content attribute information.
- the attribute information on the content data is metadata, and each element of the metadata is property information.
- FIG. 6 and 7 show part of the property information.
- Property information is presented to the client in response to a property information acquisition request based on the [X-GETS chema] from the client.
- FIG. 6 and FIG. 7 are diagrams each showing an example of a part of the property information presented to the client.
- a property name Property Name
- a data type such as a numerical value and a character string
- a multiple Multiple
- a property description Property Description
- the total size shown in Fig. 6 indicates the size data of the original content.
- a container is an object as a folder that stores contents.
- the total duration indicates the total duration of the content.
- the original file format (original File Format) is the original content data before conversion. Indicates the format of the data. For example, it is indicated as MI MET ype. Specifically, Audio / Mpeg Audio / WAV, Audio / X-openmg, Audio / L16, Video / MPEG, Video / JPEG, etc.
- Original Codec indicates the codec as the encoded data format of the original content data before conversion.
- a value that can be set as an original codec as a property, that is, an allowed value (Allowed Value) is set in advance and is as shown in FIG. That is, various setting allowable values such as MPEG1L3, ATRAC3, ATRAC31us, JPEG, and -'MPEG4V indicating various data compression processing modes are predetermined.
- the data compression process corresponding to each Allowed Value is as shown in Figure 8 Description.
- the value set in the Original Codec is the encoded data mode information of the original content data held by the server. That is, the encoded data mode information of the original data that has not been converted by the data conversion function of the server.
- the original resolution is resolution information of the original content data held by the server. This is the case when the content is gazette data. For example, various resolution information such as 1600 X 1200, 1280 X 1024, and 800 X 600 are set.
- the server further has property information shown in FIG. 7 as content resource information.
- the server can provide information obtained by converting the original data in various modes to the client as resource data separately from the original data, and the data that can be provided to these clients is the resource data. Information on these resources is also set in the property information for content.
- the resource protocol information (res @ protocol Info) is information on the resource file format. [Res] indicates that it is resource information.
- Information on the file format of the resource is indicated, for example, as MI MET type, similarly to the data format information of the original content described above.
- the resource codecs (res @ av: codec), which are Audio / Mpeg, Audio / WAV, Audio / X-openmg, Audio / L16, Video / MPEG, Video / JPEG, etc.
- Data setting information that indicates various data compression processing modes shown in Fig. 8, MPEG1L3, ATRAC3, ATRAC3p1us, ' ⁇ , JPEG,-', MPEG4V, etc. The value is predetermined.
- Resource size (res @ size) indicates the size of resource data. The property information shown in FIGS.
- 6 and 7 is information held by the server as attribute information corresponding to the content, and shows a part of information that can be provided to the client.
- various contents information is provided from the server to the client in response to a property information acquisition request from the client.
- the client receives the record quality level, which is the data recording quality of the content to be played back, and the details of the codec information as the encoding mode. You can make a transmission request by selecting
- Data can be received and reproduced.
- the client can identify the original data information based on the property information. Generate a functional display screen (UI: user interface) and display it on the display. Alternatively, an optimum data mode in the own device is identified according to a program stored in advance, and a content data transmission request in the identified data mode is transmitted to the server.
- the client machine generates a display screen (UI: user interface) capable of identifying the data mode information that can be provided by the server and the original data information based on the XML data including the property information received from the server.
- the user can know the data mode information that can be provided by the server and the original data information based on the information displayed on the display. If the data format that can be processed by the client device and the original data format that the server holds match, the user selects the original data as the data to be transmitted from the server, thereby performing extra data conversion processing. It will be possible to receive high-quality data that has not been processed and perform playback processing. Referring back to FIG. 4, the description of the processing sequence between the super clients will be continued.
- step S22 the server transmits to the client XML data generated based on the above-described property information including the data mode information of the original content and the data mode information of the content that can be provided, and the client receives the XML data. Then, the client machine displays the content information list on the display of the client machine based on the XML data. In the display processing of the content information list, a list is displayed based on the data mode information of the original content held by the server and the data mode information of the content that can be provided from the server to the client.
- Figures 9 and 10 show display examples of the content information list. Fig. 9 shows an example of how a client device generates a message based on property information related to audio data content.
- FIG. 9 shows an example of how a client device generates a message based on property information related to audio data content.
- FIG. 10 shows display information generated in the client device based on property information relating to image data content.
- a title, an artist name, and the like are displayed as basic information of the attribute information of the content.
- file format information 351, codec information 352 as encoded data mode information are displayed. Is displayed.
- an asterisk is attached to the file format information and codec information on the original data held by the server, so that the data can be identified.
- a data mode that can be processed by the client device is indicated by a white display area, and a data mode that cannot be processed is indicated by a gray display area.
- the display information as shown in FIG. 9 is generated based on the XML data based on the property information received from the server according to a display processing program of the client device in advance. Therefore, the display mode differs depending on the setting of the display processing program.
- the property information received from the server includes the data mode information of the original content held by the server and the data mode information of the content that can be provided from the server to the client.
- the ant generates display information capable of identifying the data mode information and displays it on the display.
- the file format of the original data held by the server is Audio / MPEG and the codec is ATRAC3.
- FIG. 10 is a diagram showing an example of display information when the content is image data. As shown in FIG. 10, a title, an artist name, and the like are displayed as basic information of the attribute information of the content, and further, file format information 361, codec information 3 as encoded data mode information are displayed. 62 and resolution information 3 63 are displayed. In this example, an asterisk is attached to the file format information, codec information, and resolution information of the original data held by the server so that they can be identified.
- a data mode that can be processed in the client device is set in a white display area, and a data mode that cannot be processed is set in a gray display area.
- These show an example of display processing performed based on the XML data received from the server and the processing function information of the own device.
- the file format of the original data held by the server is Video / MPEG
- the codec is MPEG4
- the resolution is 1600 ⁇ 1200. If the client device can process these original data modes, the user can specify the data mode of the original data and make a content transmission request to the server. If processing of these data is not possible, it is possible to select data in a format closer to the original and make a transmission request.
- the resolution of the original data held by the server is 1600 x 1200, but it is grayed out on the client device as shown in the figure and cannot be displayed by the client display function.
- the file format and codec since the processing of the data form of the original data held by the server can be executed by the client, these data forms, that is,
- Video / MPEG Codec MPEG4
- step S23 the client displays display information as shown in FIGS. 9 and 10 on the display of the client based on the XML data composed of the property information received from the server.
- the display information is display information that can identify the data mode information of the original content held by the server and the data mode information of the content that can be provided from the server to the client. The display information is used to identify whether or not it is possible.
- step S24 the user selects and determines the data mode of the content requested from the server based on the display information.
- step S25 the determined content data mode information is transmitted from the client to the server. For example, as described above
- step S26 the server extracts the transmission content from the storage unit based on the information received from the client, executes a conversion process in the data conversion unit in the server as necessary, and in step S27, Sends content to the client.
- step S28 the client executes a process of reproducing the content received from the server. In this way, the client, as the content information held by the server, receives the data form information of the original content held by the server and the request from the server. Since the data mode information of the content that can be provided to the client can be received as property information, it is possible to preferentially select the original data and to select the optimal data that matches the function of the device itself, and high quality Data reproduction is realized.
- display information is generated based on the property information received from the server, and the data format information of the original content held by the server and the data of the content that can be provided from the server to the client are included in the display information.
- the processing function information of the client device By comparing the property information to be processed with the processing function information of the client device, the information that can be processed by the client and has the data form closest to the data form of the original data held by the server is determined according to the predetermined setting information. Automatically select and transmit data mode information as the selected result
- the content transmission request specifying a data mode may be configured to automatically transmit to the server.
- step S111 the client device issues a request for acquiring property information to the server. As described above, this is executed as a process of transmitting a command [X—GETS chema] with a class designation to the server, for example.
- step S112 the client receives the property information from the server as XML data.
- step S113 the client generates display information (UI) based on the received property information and displays it on the display.
- UI display information
- the display mode can identify the data mode information of the original content held by the server and the data mode information of the content that can be provided from the server to the client. This is display information capable of identifying whether or not processing is possible in the device.
- the user determines the data format, such as the file format, codec, and resolution information, based on the content information displayed on the display of the client device.
- the user determines the data format.
- the first mode information is transmitted to the server.
- the server selects data based on the data mode information received from the client, performs data conversion processing as necessary, and transmits content data having the data mode specified by the client to the client.
- the client receives the content from the server and executes a reproduction process.
- the reproduction processing in the client may include data conversion processing by a data conversion processing unit such as a codec in the client.
- the processing example shown in FIG. 11 is a processing example in which display information is generated based on property information received from a server, and a user selects a data mode based on the display information.
- FIG. 12. a description will be given of a processing procedure in which the client device automatically executes the selection of the data mode without going through the selection process by the user.
- the client device makes a request to the server to acquire property information. This is executed as a process of transmitting a command [X-GETS chema] with a class designation to the server as described above, for example.
- step S212 the client receives the property information from the server as XML data.
- step S213 the data format of the original data held by the server included in the property information received from the server Is compared with the processing function information of the client device to determine whether or not the data mode of the original data held by the server can be processed by the client device. If the determination in step S213 is Yes, that is, if the data mode of the original data held by the server can be processed by the client device, the process proceeds to step S214, where the original data held by the server is processed.
- the data mode is determined as the data mode of the transmitted content.
- step S213 determines whether the data form of the original data held by the server cannot be processed by the client device.
- the one having the data form closest to the data form of the original data held by the server is automatically selected in accordance with the predetermined setting information.
- the setting information is, for example, a transmission request based on a combination of three data mode information of the data mode information of the original data, the data mode information that can be provided by the server, and the data mode information that can be processed by the client device. This is set as table information in which one data mode is set.
- step S216 the determined data mode information is transmitted to the server.
- the server selects data based on the data mode information received from the client, performs data conversion processing as necessary, and transmits content data having the specified data mode from the client to the client.
- the client receives the content from the server and executes a reproduction process.
- the property information as the component element of the metadata as the attribute information of the content can be provided to the client from the data mode information of the original content held by the server and the client.
- the data format information of the content are transmitted from the server to the client in response to the property information acquisition request from the client.
- the client determines the optimal data mode based on the data mode information of the original content held by the server and the data mode information of the content that can be provided from the server to the client, and outputs a content transmission request to the server. It is possible to obtain and reproduce high-quality data at the client, that is, high-quality data close to the original data or original data that has not undergone extra data conversion processing.
- the hardware configurations of the server and the client device are as described above with reference to FIG. 2, and the various processes described above are performed by the control unit according to the programs stored in the storage unit of each server and client. CPUs run.
- the processing executed by the CPU is to obtain metadata corresponding to content and generate XML data based on property information in accordance with a request from the client, and further to request data from the client, a file format, and a file format.
- This is the process of acquiring the content, codec, and resolution information, extracting the content data according to the acquired information, performing data conversion as necessary or data, and transmitting the content to the client.
- Processing on the client side is to display a content information list on a display based on XML data consisting of property information received from the server. Based on the function of the device itself and the content information, it is a process of determining the data mode of the content to be requested from the server, and a process of controlling the playback of the received content.
- FIG. 13 is a block diagram showing the main functional configuration of the server.
- the packet transmitting / receiving unit 501 receives a packet to the client and a packet from the client.
- the packet generation / analysis unit 502 performs a generation process of a transmission packet and an analysis process of a reception packet. This includes setting the address of the packet, recognizing the address, storing the data in the data section, and acquiring data from the data section.
- the content storage unit 503 stores the content held by the server.
- the metadata storage unit 504 is a storage unit that stores metadata as attribute information corresponding to content. As described above, the metadata storage unit 504 stores the property information constituting the metadata, and as the property information, the original content of the original content held by the server described with reference to FIGS.
- the data format information and the data format information of the content that can be provided from the server to the client, specifically, file format, codec, and resolution information are included.
- the property information acquisition request received from the client for example, a bucket in which the class name is added to the command [X—GETS chema], the metadata of the specified class is converted to metadata. The processing of taking out from the storage unit 504 is executed.
- the XML data generation unit 506 generates XML data to be transmitted to the client based on the metadata acquired by the property information acquisition unit 505.
- data The conversion unit 507 converts the original content held by the server into a data format corresponding to the request from the client. Performs conversion of file format, codec, resolution, etc. For example, perform data conversion based on ATRAC 3 and MPEG 4. Note that each server has a different codec function, and the resource data that can be provided to the client differs according to the function.
- the bucket transmitting / receiving unit 6001 receives a packet to the server and a packet from the server.
- the packet generation / analysis unit 602 performs a transmission packet generation process and a reception bucket analysis process.
- the storage unit 603 stores contents included in packets received from the server, codec information of the client, and the like.
- the output unit 604 includes a speaker and a display applied to the content reproduction processing. The display is also used for outputting the display information described above with reference to FIGS.
- the input unit 605 is, for example, a keyboard for executing input of selection information of a data mode of content displayed as display information, and other data input means.
- the XML data analysis unit 606 analyzes the XML data composed of the property information received from the server, generates the display information described above with reference to FIGS. 9 and 10 based on the analysis data, and outputs the display information. Executes processing to output to the display as a unit.
- the reception data mode determination unit 607 receives the property information received from the server, That is, based on the data form information of the original content held by the server and the data form information of the content that can be provided from the server to the client, and the processing function information of the client device, the optimal data form to be received from the server, Specifically, it executes processing to determine information on file format, codec, and resolution.
- the data conversion unit 608 executes a data mode conversion process of the content data received from the server.
- FIG. 13 and 14 are block diagrams for explaining the functions. Actually, various processing programs are executed under the control of the CPU in the hardware configuration such as the PC shown in FIG. Be executed.
- the present invention has been described in detail with reference to the specific embodiments. However, it is obvious that those skilled in the art can modify or substitute the embodiment without departing from the spirit of the present invention.
- the present invention has been disclosed by way of example, and should not be construed as limiting. In order to determine the gist of the present invention, the claims should be considered.
- the series of processes described in the specification can be executed by hardware, software, or a combined configuration of both.
- a program recording the processing sequence can be installed and executed in a memory in a computer built in dedicated hardware, or a general-purpose computer capable of executing various processing. It is possible to install and run the program at For example, the program can be recorded in a hard disk or a ROM (Read Only Memory) as a recording medium in advance.
- the program can be stored on a removable recording medium such as a flexible disk, CD-ROM (Compact Disk Read Only Memory), MO (Magneto optical) disk, DVD (Digital Versatile Disk), magnetic disk, or semiconductor memory. It can be stored (recorded) temporarily or permanently.
- a removable recording medium can be provided as so-called package software.
- the program can be installed on the computer from the removable storage medium as described above, besides being downloaded from a download site card to a computer, or via a network such as a LAN (Local Area Network) or the Internet.
- the program can be transferred to a computer by wire, and the computer can receive the transferred program and install it on a recording medium such as a built-in hard disk.
- a system is a logical set configuration of a plurality of devices, and is not limited to a device in which each component is in the same housing.
- INDUSTRIAL APPLICABILITY As described above, according to the configuration of the present invention, in the content providing server, the original content held by the server is added to the property information constituting the meta information which is the attribute information corresponding to the content. Data format information, specifically, file format information, codec information as coded data format, and resolution information, and the server holds the content information in response to a content information acquisition request from the client.
- Data format information of the original content is generated and transmitted to the client, so that the client determines the optimal data format based on the data format information of the original content held by the server, and specifies the data format. Transmission requests can be made, and high-quality data at the client, that is, high-quality data close to original data or original data that has not undergone extra data conversion processing, can be obtained and played back.
- the data mode of the original content held by the server included in the property information as a component of the content information received from the server Since the display information is generated so that the information can be identified and displayed on the display of the client, the user can send the data from the data form information of the original content and the server to the client based on the display information. It is possible to determine the data mode information of the content that can be provided, and it is possible to easily determine the optimum data mode and output a content transmission request to the server.
- the data mode of the original content held by the server included in the property information as a component of the content information received from the server is determined based on the information, the data mode information of the content that can be provided from the server to the client, and the processing function information of the client device, and a content transmission request with the determination information is sent to the server. It is configured to execute the process of outputting the original data without acquiring the processing load such as the data selection by the user, obtaining the original data without the extra data conversion process or the high quality data close to the original data, Playback processing becomes possible.
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Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/543,326 US8935236B2 (en) | 2003-01-28 | 2003-12-16 | Information processing apparatus and method, and computer program |
AU2003289109A AU2003289109A1 (en) | 2003-01-28 | 2003-12-16 | Information processing device, information processing method, and computer program |
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- 2003-12-16 CN CNB2003801100628A patent/CN100388249C/zh not_active Expired - Fee Related
- 2003-12-16 AU AU2003289109A patent/AU2003289109A1/en not_active Abandoned
- 2003-12-16 WO PCT/JP2003/016083 patent/WO2004068353A1/ja active Application Filing
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- 2003-12-16 BR BR0318059-0A patent/BR0318059A/pt not_active IP Right Cessation
- 2003-12-16 KR KR1020057013804A patent/KR101309437B1/ko active IP Right Grant
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- 2003-12-16 KR KR1020117024879A patent/KR20110120988A/ko not_active Application Discontinuation
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Also Published As
Publication number | Publication date |
---|---|
RU2005123983A (ru) | 2006-02-27 |
US20160197978A1 (en) | 2016-07-07 |
BR0318059A (pt) | 2005-12-20 |
EP1589434B1 (en) | 2019-05-15 |
KR20110120988A (ko) | 2011-11-04 |
EP2763353B1 (en) | 2020-05-20 |
US8935236B2 (en) | 2015-01-13 |
RU2348969C2 (ru) | 2009-03-10 |
CN100388249C (zh) | 2008-05-14 |
JP3941700B2 (ja) | 2007-07-04 |
KR20100130650A (ko) | 2010-12-13 |
JP2004234111A (ja) | 2004-08-19 |
EP1589434A1 (en) | 2005-10-26 |
KR20050096160A (ko) | 2005-10-05 |
US9699245B2 (en) | 2017-07-04 |
KR101309437B1 (ko) | 2013-09-23 |
CN1757020A (zh) | 2006-04-05 |
EP2254064A3 (en) | 2010-12-22 |
EP2763353A1 (en) | 2014-08-06 |
EP2254064A2 (en) | 2010-11-24 |
CN101232507A (zh) | 2008-07-30 |
BRPI0318059B1 (pt) | 2019-03-06 |
US20080027953A1 (en) | 2008-01-31 |
US9325779B2 (en) | 2016-04-26 |
CN101232507B (zh) | 2012-05-30 |
US20140012946A1 (en) | 2014-01-09 |
AU2003289109A1 (en) | 2004-08-23 |
EP1589434A4 (en) | 2008-08-20 |
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