JP2008199656A - Profile information transmitting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that when distributing music or video contents via the internet, conventionally, sample data are first downloaded and viewed and if a user desires to purchase the contents, formal data are downloaded by performing access again but when purchasing the contents, it is necessary to perform downloading twice, it troubles the viewer thereby giving the viewer disincentive to purchase the contents. <P>SOLUTION: Formal data are downloaded from the beginning and a user performs playback based on a profile designating a region where data can be played back. Thus, even if formal contents are distributed, playback control can be performed at a distribution side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a profile information transmitting apparatus.

  Conventionally, when distributing content such as music and video over the Internet, first download and view sample data, then download the formal data when you wish to purchase the content. And so on.

The following are conventional techniques.
JP 2002-340006 JP 2001-203655 A JP 2001-326924 A JP2002-101086 JP-A-11-150720 JP2002-10251

  However, in order to purchase content, it is necessary for the viewer to download the sample data and the regular data for purchase twice as described above. As a result, there is a problem that the viewer's willingness to purchase content is attenuated.

  Moreover, the downloaded content always reproduces only one content.

  In the present invention, in order to solve this problem, the entire content is downloaded from the beginning, and the user separately acquires profile information that enables data reproduction, and performs reproduction based on the profile information. As a result, even if the entire content is distributed, playback control can be performed on the distribution side.

  Furthermore, it is possible to extract and reproduce only music or only video from the content composed of downloaded video and music.

  The user can download and accumulate the entire content and select a part of the content that matches his / her preference. At this time, the content can be reproduced by purchasing profile information that designates a reproducible portion of the content. As a result, the user can save the trouble of downloading the content to be purchased after viewing the sample version.

  Furthermore, content data is hierarchically encoded with scalability, and basic layer information essential for playback of the content and higher layer information for improving image quality are acquired according to the scene, and an optimal playback method is taken. Can do. Hierarchization of content data by scalability has the effect of eliminating instability of the transmission path.

  Further, the content can be reproduced even when the cache server can mediate and the content reproduction apparatus does not have a stream reconstruction function (for example, a mobile phone).

Hereinafter, embodiments of the present invention will be described. The present invention is not limited to these embodiments, and can be implemented in various modes without departing from the scope of the invention.
<< Embodiment 1 >>

  <Embodiment 1: Overview>

  Embodiment 1 will be described. The present embodiment is a profile information transmitting apparatus that transmits profile information. FIG. 1 shows an example of the concept of this embodiment. As shown in the figure, the content is composed of video that reports on the background of the sea, narration by the person who reports, the music of BGM, and the sound of waves. Each of these four elements is held as a stream file. Here, profile information, which is information necessary for enabling reproduction according to the combination of the plurality of stream files, is acquired. The user can reproduce the stream file of the transmitted content by referring to the profile information. In the example shown in the figure, the profile information includes all four stream files, and by using this, reproduction can be performed in a state where the four stream files are combined. On the other hand, the profile information may not be information on all stream files constituting the content, but may be information on some stream files as necessary. For example, if the profile information specifies reproduction of only a music stream file, only the music stream file can be reproduced.

  At this time, depending on the type of stream file included in the profile information, it is possible to select a device to be used for reproducing the content. That is, when a video stream is included in addition to an audio stream, a device including a video output device (screen or the like) and an audio output device (speaker or the like) is required.

  <Embodiment 1: Configuration>

  The first embodiment will be described. This embodiment is a profile information transmission apparatus. An example of functional blocks in this embodiment is shown in FIG.

  The “profile information transmission device” (0200) of this embodiment shown in FIG. 2 includes a “profile information acquisition unit” (0201), a “content identification information acquisition unit” (0202), and a “profile information transmission unit” (0203). ).

  Each unit, which is a component of the present invention, is configured by either hardware, software, or both hardware and software. For example, as an example for realizing these, when a computer is used, hardware composed of a CPU, a memory, a bus, an interface, a peripheral device, and the like and software executable on these hardware are listed. be able to.

  Specifically, the functions of the respective units are realized by sequentially executing the programs developed on the memory, by processing, storing, and outputting data on the memory and data input through the interface. (The same applies throughout this specification.)

  The “profile information acquisition unit” (0201) acquires profile information.

  “Profile information” refers to information including information necessary for enabling reproduction of content that can be configured from a combination of a plurality of stream files in accordance with the combination of the stream files.

  “Content” refers to information composed of video, audio, and the like. The content is composed of a combination of one or more stream files. That is, the stream file corresponds to, for example, a music file, a video file, or the like. In some cases, all stream files constituting the content are referred to as the entire content, whereas some stream files are referred to as a part of the content (the same applies throughout this specification).

  Profile information includes, for example, the type of one or more stream files that make up the content (video and music, only music, etc.), and information that is necessary for the composition of the content that consists of multiple stream files (how to synchronize) Information related to the decryption key and the designation of a reproducible part (reproducible for 5 minutes from the beginning or reproducible only for chapter 3), etc. .

  The “acquisition” may include a case where the profile information is transmitted from outside the profile information transmitting apparatus (for example, a content transmitting apparatus) and a case where the profile information is generated inside.

  The “content identification information acquisition unit” (0202) acquires content identification information.

  “Content identification information” is information for identifying content that can be configured from a combination of a plurality of stream files. The content is associated with the profile information by the content identification information. Since the profile information is information necessary to enable reproduction according to the combination of stream files, the content and the combination of each stream file are associated with each other.

  The “profile information transmission unit” (0203) transmits the profile information acquired by the profile information acquisition unit in association with the content identification information acquired by the content identification information acquisition unit.

  FIG. 3 shows an example of profile information. Here, the content identified by the content identification information “2340” has profile information including profile 1 and profile 2. Profile 1 consists of a combination of four stream files: video, sound effects, music, and narration. Profile 2 consists of a stream file containing only music.

  Then, the same content identification information is associated with the profile information necessary for reproducing the stream files constituting the same content. The content identification information associated with the profile information can identify which content the profile information is related to. With this association, the user can easily confirm the content that the user wants to view and the profile information corresponding to the content.

  FIG. 3 also includes information for designating a reproducible area. Profile 1 is information that all stream files can be played back only for 1 minute and 20 seconds, and profile 2 is information that can play back only the entire music stream file. Therefore, even if all stream files constituting the content have been downloaded, the content playback device of the user can be limited to playback of a part of the content based on the above profile information. it can. Specifically, if the entire content is viewed with profile 1 for 1 minute 20 seconds and purchase of a music stream is desired, profile 2 may be purchased.

  FIG. 4 shows an example of profile information generated when partially purchasing content. The user can purchase profile information by arbitrarily selecting a stream desired to be reproduced from a plurality of streams. As shown in FIG. 4, when a music stream is purchased, profile information for music playback is obtained. In addition to the identification information for the music stream, the identification information for the content is also associated with the profile information for music reproduction, so that it is possible to identify what content and what stream the information is about. The music stream file can be reproduced by acquiring the music reproduction profile information. Here, using a portable medium or the like, it is possible to move and reproduce the music stream and the profile information together. Further, the music stream file that can be played back once may be played back without profile information. Also in this case, it is possible to reproduce / move a music stream alone using a portable medium or the like.

  Also, all the video and audio streams shown in FIG. 4 are stored in advance in the terminal, and only the promotional information is transmitted to the terminal as profile information. The profile information for promotion only is information that enables reproduction of only a part of the stream. As a result, when the user views or listens to the promotion and likes the stream, the user acquires again the profile information that makes it possible to reproduce the entire stream already stored in the terminal (the entire video or the entire audio is possible). At this time, it may be possible to acquire it on the condition of the accounting process.

  <Embodiment 1: Processing flow>

  FIG. 39 shows the flow of processing in the first embodiment. The profile information transmission method according to the present embodiment includes the following steps.

  In step S3901, profile information including information necessary for enabling reproduction of content that can be configured from a combination of a plurality of stream files according to the combination of the stream files is acquired (profile information acquisition step).

  In step S3902, content identification information, which is information for identifying the content, is acquired (content identification information acquisition step).

  In step S3903, the profile information acquired in the profile information acquisition step and the content identification information acquired in the content identification information acquisition step are transmitted in association with each other (profile information transmission step).

  FIG. 5 specifically shows the flow of the above processing.

  First, a profile that is data used to generate profile information is acquired (step S0501). The profile corresponds to information on the type or combination of stream files. The profile information is obtained by adding an identification ID or the like to the profile. As long as this unprocessed profile exists, the processing from step S0502 to step S0505 is repeated.

  First, it is confirmed whether an unprocessed profile remains (step S0502). If no profile remains, the process proceeds to step S0506.

  If an unprocessed profile remains, profile information including the ID of a stream file to be reproduced (for example, a video stream file, an audio stream file, etc.) is generated (step S0503).

  Next, it is determined whether or not a reproducible area is specified (step S0504). If there is no specification, the process returns to step S0502.

  If a reproducible area is specified, the area counter is set in the profile information (step S0505). Thereafter, the process returns to step S0502.

  If the result of determination in step S0502 is that the unprocessed profile does not remain, content identification information is acquired (step S0506).

  Finally, the profile information and the content identification information are transmitted in association with each other (step S0507).

  The above processing can be executed by a program to be executed by a computer, and this program can be recorded on a recording medium readable by the computer. (The same applies throughout the specification.)

  <Embodiment 1: Effect>

By transmitting the profile information with the profile information transmitting apparatus of the first embodiment, the user can reproduce a part of the content that has already been accumulated according to his / her hobbies / preferences and the playback device he / she owns. Make it possible.
<< Embodiment 2 >>

  <Embodiment 2: Overview>

  Embodiment 2 will be described. The present embodiment is a content transmission apparatus that encodes and transmits a stream file that constitutes content.

  <Embodiment 2: Configuration>

  An example of functional blocks of the content transmission apparatus according to the second embodiment is shown in FIG.

  The “content transmitting apparatus” (0600) of the present embodiment illustrated in FIG. 6 includes a “content identification information acquisition unit” (0601), a “stream data encoding unit” (0602), and a “stream data transmitting unit” (0603). ).

  The “content identification information acquisition unit” (0601) acquires content identification information. The acquisition of the content identification information may include a case of acquiring from the outside (for example, a profile information transmitting device) in addition to the case of generating and acquiring the content identification information internally.

  The “stream data encoding unit” (0602) encodes the content stream file into encoded stream data.

  A stream file is a file that constitutes content by a plurality of combinations, and an encoded stream file is referred to as encoded stream data.

  “Encoding” refers to determining an appropriate code system and converting it into a code. For example, it corresponds to a case where analog data is encoded into digital data, or a case where they are re-encoded into another format (such as MPEG format). The meaning of encoding may include encryption.

  The “stream data transmission unit” (0603) associates and transmits the encoded stream data encoded by the stream data encoding unit and the content identification information acquired by the content identification information acquisition unit.

  <Embodiment 2: Processing flow>

  FIG. 7 shows the flow of processing in the second embodiment. The content transmission method according to the present embodiment includes the following three steps.

  First, content identification information is acquired (content identification information acquisition step S0701).

  Next, the stream file is encoded into encoded stream data. (Stream data encoding step Step S0702).

  Finally, the encoded stream data and the content identification information are transmitted in association with each other (encoded stream data transmission step step S0703).

  <Embodiment 2: Effect>

  The content transmission apparatus according to the present embodiment may be combined with the profile information transmission apparatus according to the first embodiment to have a single device form. In this case, profile information can be transmitted together with all stream files (encoded stream data) constituting the content in order to enable reproduction according to the combination of the stream files.

  In the embodiment described above, it is possible to adopt a configuration in which content (stream file of content) in which the stream file is composed of music, narration, and video (stream file of content) is temporarily stored on the receiving side. Therefore, even if the user wants to play only the music and listens to the music, and then wants to play the content including the narration and the video, those stream files (encoded stream data) are downloaded again. There is no need.

  This is because these stream files are already stored on the receiving side in order to play music first.

  Therefore, those who want to play only music and listen to music, and then want to play the content with narration and video added (reception side) must minimize those stream files. It is only to obtain profile information for playing back.

  However, this profile information has a data amount sufficiently smaller than that of the stream file constituting the content. Therefore, the time required for the receiving side to acquire the profile information is generally sufficiently shorter than the download time for acquiring the stream file.

  When these are observed from the receiving side, it seems that a large content file has been downloaded in a very short time.

  Because at the time of playing music, narration and video playback cannot be performed, so it is impossible to feel that such information is stored in its own playback device (receiving device etc.) This is because they can be reproduced by downloading the profile information in a short time.

  If this mechanism is used for selling contents, the person who sells the contents can sell the contents at the moment when the purchase intention of the purchaser (receiving device side) is increased. Further, it is easy for the purchaser to obtain (that is, can be downloaded in a short time). Accordingly, a person who sells content can enjoy the benefit of not missing a business opportunity.

In addition, in the case of a configuration in which all the video and audio streams and promotional profile information are distributed free of charge and profile information that enables playback of the entire stream is transmitted on condition that the processing for billing is performed again, the above immediately In addition to the effect of being able to cope with the user's wishes, the advertisement / advertisement effect can be enhanced by promotion.
<< Embodiments 3 to 5 >>

  <Embodiments 3 to 5: Overview>

  Embodiments 3 to 5 will be described. The present embodiment is a content reproduction apparatus that performs content reproduction processing based on profile information.

  <Embodiment 3: Configuration>

  An example of functional blocks of the content reproduction apparatus in the third embodiment is shown in FIG.

  The “content reproduction device” (0800) of the present embodiment shown in FIG. 8 includes an “encoded stream data storage unit” (0801), a “profile information reception unit” (0802), and a “content reproduction processing unit” (0803). ).

  The “encoded stream data storage unit” (0801) stores encoded stream data. Along with the encoded stream data, content identification information associated therewith may be stored. Here, the encoded stream data to be stored may be data received from the content transmission apparatus described in the second embodiment.

  Further, the accumulation may include temporary accumulation for holding. For example, there is a case where encoded stream data is accumulated for a moment for stream reproduction.

  The “profile information receiving unit” (0802) receives profile information. The profile information receiving unit receives profile information transmitted from the profile information transmitting apparatus described in the first embodiment and content identification information associated therewith.

  The “content reproduction processing unit” (0803) reconfigures the encoded stream data stored in the encoded stream data storage unit based on the profile information received by the profile information reception unit, and performs processing for content playback. To do. At that time, the content reproduction processing unit performs processing for reproducing the same content based on the content identification information associated with the profile information and the encoded stream data.

  “Reconstruction” means reassembly. For example, a process of selecting encoded stream data corresponding to specified profile information from a plurality of stored encoded stream data, and a process of combining a plurality of selected encoded stream data are included.

  “Processing for playback” refers to all processing required for playback. Data is output to a playback device or the like according to the process of decoding the encoded stream data, selection of the playback method (frame presence / absence, selection of image quality, etc.), selected playback method, playable area, etc. Processing is applicable. In addition, for example, processing for extracting video and narration from a plurality of stream files and synthesizing content, or synchronizing video and audio may be included. Further, it may include a case where playback is actually performed.

  User selects content from menu of content playback device (sports news or comedy movie, etc.), specifies stream file (music only, music and video, etc.), selects screen (full screen, small screen, etc.) ) Etc., the processing for reproduction is performed by the content reproduction apparatus.

  <Embodiment 3: Effect>

  In the content reproduction apparatus according to the third embodiment, the user can select and reproduce a stream file (for example, music, video, etc.) that matches his / her preference from a plurality of stream files constituting the content. In other words, if the user has received all the stream files that make up the content, the narration and video can be played even if the user wishes to play the narration and video stream files after playing the music-only stream file. It is possible to immediately reproduce by selecting and executing profile information including information that makes it possible to reproduce the stream file.

  <Embodiment 4>

  9 and 10 show the flow of processing in the third embodiment. The content reproduction method according to the third embodiment includes a step of accumulating encoded stream data and a step of receiving profile information, and has different effects as described later depending on which step is executed first. Therefore, a method of first storing the encoded stream data as the first content reproduction method and a method of receiving the profile information first as the second content reproduction method will be described.

  FIG. 9 shows a method for storing encoded stream data first, which is the first content reproduction method.

  First, encoded stream data is accumulated (encoded stream data accumulation step Step S0901). At this time, the encoded stream data to be accumulated is transmitted from the content transmission apparatus. The encoded stream data accumulated in this way may be confirmed in a list state.

  Profile information is received after the encoded stream data accumulation step (step S0901) (profile information step reception step S0902).

  Based on the profile information received in the profile information reception step, the encoded stream data stored in the encoded stream data storage step is reconfigured to perform processing for content playback (content playback processing step step S0903). .

  <Embodiment 5>

  FIG. 10 shows a method of first receiving profile information, which is the second content reproduction method.

  First, profile information is received (profile information receiving step, step S1001).

  After the profile information reception step (S1001), the encoded stream data is accumulated (stream data accumulation step step S1002).

  Based on the profile information received in the profile information reception step, the encoded stream data stored in the encoded stream data storage step is reconstructed and processing for content playback is performed (content playback processing step step S1003).

  FIG. 40 more specifically shows a content reproduction method.

  First, the total number of segments of the stream to be reproduced is acquired, and the acquired total number is held as an end number (step S4001).

  Next, the segment number is set to 1 (step S4002). The segment number is a number assigned by dividing the stream file constituting the content from the beginning to the end. As a method of assigning segment numbers, the contents of the stream file may be assigned for each segment, or may be assigned at regular intervals. For example, the segment number may be assigned by the producer of the stream file.

  It is determined whether or not the area (segment) indicated by the segment number can be reproduced (step S4003). Reproducibility corresponds to both a case where no reproducible area is designated and a case where a reproducible area is designated and the designated area is indicated by a segment number.

  If it is determined that the area indicated by the segment number can be reproduced, a process for reproduction is performed (step S4004). For example, the segments are sequentially decoded and the decoding result is output on the user interface.

  After the process of step S4004, or if it is determined that the area indicated by the segment number is not reproducible, it is determined after the process of step S4003 whether the segment number is equal to the end number (step S4005). If the segment number is equal to the end number, it means that processing has been performed to the end of the stream file. Conversely, if the segment number is not equal to the end number, processing is still performed to the end of the stream file. It means that it has not been broken.

  If it is determined that the segment number is not equal to the end number, the segment number is incremented (step S4006). Thereafter, the process returns to step S4003 to determine whether or not the area indicated by the segment number can be reproduced.

  If it is determined that the segment number is equal to the end number, the process ends.

  <Embodiments 4, 5: Effects>

  In the fourth embodiment, the encoded stream data is first stored before the profile information is received. Even if a large amount of content is downloaded and stored at night when the line is free, etc., the user can immediately reproduce it by obtaining profile information. In addition, since the entity can be acquired, it can be played back by a portable playback device.

In the fifth embodiment, prior to accumulation of encoded stream data, first, profile information reception processing is performed. By storing a large number of profile information and accumulating only encoded stream data that the user is interested in and desires to reproduce, the hardware resource can be effectively used.
<< Embodiments 6 to 7 >>

  <Embodiment 6: Overview>

  The sixth embodiment is the profile information transmitting apparatus according to the first embodiment, which receives a profile information request.

  <Embodiment 6: Configuration>

  An example of functional blocks of the profile information transmitting apparatus in the sixth embodiment is shown in FIG.

  The “profile information transmission device” (1100) of the present embodiment shown in FIG. 11 includes a “profile information acquisition unit” (1101), a “content identification information acquisition unit” (1102), and a “profile information transmission unit” (1103). And a “profile information request receiving unit” (1104). The “profile information acquisition unit” (1101), the “content identification information acquisition unit” (1102), and the “profile information transmission unit” (1103) are the same as those already described in the first embodiment.

  A “profile information request receiving unit” (1104) performs processing for receiving a profile information request. The “profile information request” is a request for transmitting profile information. The profile information request is sent from the content reproduction apparatus to the profile information transmission apparatus, and indicates a reproduction request by designating a stream file (for example, a music stream file) included in the content. When the content reproduction apparatus acquires profile information based on the profile information request, the desired stream file can be reproduced.

  The received profile information request may be passed to the profile information acquisition unit (1101) and profile information based on the request may be acquired. Alternatively, the profile information request may be passed to the profile information transmission unit (1103) and profile information corresponding to the request from a plurality of profile information. You may choose to send. In this case, there may be a profile information holding unit that holds a plurality of profile information for selective transmission.

  <Sixth Embodiment: Process Flow>

  FIG. 12 shows the flow of processing in the sixth embodiment. A method for transmitting profile information for receiving a profile information request includes the following steps.

  A profile information request is received (step S1201).

  Profile information is acquired (step S1202). Profile information may be acquired based on the profile information request received in step S1201.

  Content identification information is acquired (step S1203).

  Finally, the profile information and the content identification information are transmitted in association with each other (step S1204). Profile information may be selected and transmitted based on the profile information request received in step S1201.

  <Embodiment 7: Overview>

  A seventh embodiment will be described. The present embodiment is the content reproduction apparatus according to the third embodiment, which is characterized by transmitting a profile information request.

  <Embodiment 7: Configuration>

  An example of functional blocks of the content playback apparatus in the seventh embodiment is shown in FIG.

  The “content playback device” (1300) of this embodiment shown in FIG. 13 includes an “encoded stream data storage unit” (1301), a “profile information reception unit” (1302), and a “content playback processing unit” (1303). And a “profile information request transmission unit” (1304). The “encoded stream data storage unit” (1301), “profile information receiving unit” (1302), and “content reproduction processing unit” (1303) are the same as those already described in the third embodiment.

  The “profile information request transmission unit” (1304) performs processing for transmitting a profile information request. A profile information request is transmitted to the profile information transmitting apparatus in the sixth embodiment in order to transmit a user request.

  By transmitting a profile information request, the content playback apparatus designates a stream file (for example, a music stream file) included in the content, and expresses the playback request. When the profile information based on the profile information request is returned from the profile information transmitting apparatus, the desired stream file can be reproduced.

  <Seventh Embodiment: Process Flow>

  FIG. 14 shows the flow of processing in the seventh embodiment. The method for reproducing the content for transmitting the profile information request includes the following steps.

  First, processing for transmitting a profile information request is performed. A profile information request is transmitted by designating content identification information or the like (step S1401).

  Next, the profile information transmitted from the profile information transmitting apparatus in response to the profile information request is received (step S1402).

  Based on the received profile information, the encoded stream data is reconstructed and processing for content reproduction is performed (step S1403).

  <Embodiments 6 and 7: Effects>

A request for viewing the content or a stream file that is a part of the content is transmitted from the content reproduction apparatus of the seventh embodiment (in this case, synonymous with the user), and the profile information of the sixth embodiment The transmitting device transmits profile information based on the request. This is advantageous in that the user can actively view content according to his / her wishes.
<< Embodiment 8 >>

  <Embodiment 8: Overview>

  Embodiment 8 will be described. The present embodiment is the content reproduction apparatus according to the seventh embodiment, which is characterized in that a profile information request is transmitted on the condition of billing processing.

  <Eighth embodiment: configuration>

  An example of functional blocks of the content reproduction apparatus in the eighth embodiment is as already shown in FIG.

  The “content playback device” (1300) of this embodiment shown in FIG. 13 includes an “encoded stream data storage unit” (1301), a “profile information reception unit” (1302), and a “content playback processing unit” (1303). ) And a “profile information request transmission unit” (1304). The “encoded stream data storage unit” (1301), “profile information receiving unit” (1302), and “content reproduction processing unit” (1303) are the same as those already described in the third embodiment.

  The “profile information request transmission unit” (1304) performs a process for transmitting a profile information request on the condition of an accounting process. “Billing process” refers to a process for preparing to charge a fee. Therefore, it is not always necessary to actually exchange money. For example, when transmitting a profile information request, a bank account check or the like is performed, and the requested profile information is transmitted from the profile information transmitting apparatus.

  FIG. 15 is a diagram showing an outline of the flow of the accounting process. The right side is a content reproduction device, and the left side is a profile transmission device.

  Here, a content purchase request (profile information request) is issued from the profile information request transmission unit of the content reproduction device, and the request is received by the profile information request reception unit of the profile transmission device. Then, processing for settlement with the requesting user (content reproduction device) is performed. The processing for the settlement may be bank account check, withdrawal from prepaid, etc., without actually transferring money. For a regular member, when responding to a content purchase request (profile information request) without charging, it may be confirmed whether the user is a regular member.

In the profile information transmitting apparatus, a profile acquisition request is issued from the profile information request receiving unit to the profile information transmitting unit, and the profile information is passed from the profile information transmitting unit to the profile information request receiving unit accordingly. Thereafter, the profile information is received by the profile information receiving unit of the content reproduction device and passed to the content reproduction processing unit. Here, reproduction processing of a designated stream file described in the profile information is performed.
<< Embodiment 9 >>

  <Embodiment 9: Overview>

  Embodiment 9 will be described. The present embodiment is the content reproduction apparatus according to the first embodiment, wherein the profile information is information related to reproduction of content according to a combination of streams. Since the ninth embodiment has already been described in the first embodiment and the like, it will be briefly described below.

  <Ninth Embodiment: Configuration>

  An example of functional blocks of the content reproduction apparatus according to the ninth embodiment is the same as that already shown in FIG.

  The “profile information transmission device” (0200) of this embodiment shown in FIG. 2 includes a “profile information acquisition unit” (0201), a “content identification information acquisition unit” (0202), and a “profile information transmission unit” (0203). ). The processes of the “content identification information acquisition unit” (0202) and the “profile information transmission unit” (0203) are the same as those already described in the first embodiment.

The profile information acquired by the “profile information acquisition unit” (0201) is information related to content reproduction according to at least one of an audio stream and a video stream. For example, the profile information may be composed of only the video stream, or a combination of both the audio stream and the video stream may be used. When the video stream becomes a component requirement of the profile information, the playback device needs to be equipped with a screen facility. When only the audio stream is used, playback is performed by connecting a device such as an MD. You can also. By checking the contents of the profile information, preparation for playback can be made.
<< Embodiments 10 to 13 >>

  <Embodiment 10: Overview>

  The tenth embodiment will be described. The present embodiment is the content reproduction apparatus according to the third embodiment, which includes a key acquisition unit that acquires a key for decrypting encrypted profile information.

  <Embodiment 10: Configuration>

  An example of functional blocks of the content reproduction apparatus in the tenth embodiment is shown in FIG.

  The “content reproduction device” (1600) of the present embodiment shown in FIG. 16 includes an “encoded stream data storage unit” (1601), a “profile information reception unit” (1602), and a “content reproduction processing unit” (1603). And a “key acquisition unit” (1604). The “encoded stream data storage unit” (1601) and the “content reproduction processing unit” (1603) are as described in the third embodiment.

  The “profile information receiving unit” (1602) receives profile information encrypted with a key. Since the profile information is encrypted, only the person who has the authority to decrypt it can use it. The entire profile information may be encrypted or may be partially encrypted.

  The “key acquisition unit” (1604) performs processing for acquiring a key for decrypting the profile information according to the profile information. For example, the key is transmitted from the profile information transmitting apparatus together with the profile information. With the acquired key, the profile information can be decrypted, and the content can be reproduced with the decrypted profile information.

  <Embodiment 10: Flow of processing>

  FIG. 17 shows the flow of processing in the tenth embodiment. The content reproduction method according to the tenth embodiment includes the following steps.

  The encoded stream data is accumulated (encoded stream data accumulation step Step S1701).

  The profile information encrypted with the key is received (profile information step reception step S1702). Here, the order of step S1701 and step S1702 may be reversed.

  Processing for acquiring a key for decrypting the profile information is performed (key acquisition step, step S1703).

  The profile information is decrypted using the acquired key (step S1704).

  Based on the profile information received in the profile information reception step, the encoded stream data stored in the encoded stream data storage step is reconstructed and processing for content playback is performed (content playback processing step step S1705). .

  <Embodiment 11: Overview>

  Embodiment 11 will be described. The present embodiment is the content reproduction apparatus according to the third embodiment, which includes a key acquisition unit that acquires a key on the condition of billing processing.

  <Embodiment 11: Configuration>

  An example of functional blocks of the content reproduction apparatus according to the eleventh embodiment is as shown in FIG.

  The “content reproduction device” (1600) of the present embodiment shown in FIG. 16 includes an “encoded stream data storage unit” (1601), a “profile information reception unit” (1602), and a “content reproduction processing unit” (1603). ) And a “key acquisition unit” (1604). The “encoded stream data storage unit” (1601), the “profile information receiving unit” (1602), and the “content reproduction processing unit” (1603) are as described in the tenth embodiment.

  The “key acquisition unit” (1604) performs a process for acquiring a key for decrypting the profile information on the condition of the charging process according to the profile information. That is, the key can be obtained by purchasing. With the acquired key, the profile information can be decrypted, and the content can be reproduced with the decrypted profile information.

  FIG. 18 shows a first example relating to a key acquisition method. In the figure, it is assumed that only the second music stream, which is a further part of the music stream, among a plurality of streams constituting the content is encrypted. Since the other parts are not encrypted, the user can view them freely. Specifically, it is assumed that only the first of the first and second music pieces can be viewed in the music promotion video. When a user who views only No. 1 desires to listen to No. 2 of the subsequent music piece, the user uses the profile information of No. 2 music stream to decode the No. 2 music stream. However, since the profile information is encrypted here, it is necessary to purchase a key that can decrypt the profile information. If the key is acquired, the user can reproduce the music stream No. 1 as it is, and can reproduce the No. 2 after decrypting it using the profile information decrypted with the acquired key. At this time, as already described, it is possible to reproduce and move the music stream alone.

  Here, it is assumed that the profile information is decrypted with the acquired key, but the case where the second music stream itself is decrypted may be included. Further, the second music stream may be decrypted using both the acquired key and the profile information.

  FIG. 19 shows a second example regarding the key acquisition method. In the figure, it is assumed that a plurality of contents are uniformly divided by time or the like and a certain part is encrypted. Other unencrypted parts can be viewed freely by the user. Specifically, it is assumed that only a part (the trailer) of the entire movie can be viewed. When the user who has viewed it desires to listen to the entire soundtrack of the movie, the user uses the music stream profile information to decode the music stream. However, since the profile information is encrypted here, it is necessary to purchase a key that can decrypt the profile information. If the key is purchased, the user plays the unencrypted portion of the music profile information as it is and decrypts the encrypted portion using the profile information decrypted with the acquired key. It can be played after being converted.

  <Embodiment 12: Overview>

  Embodiment 12 will be described. The present embodiment is the content reproduction apparatus according to the tenth embodiment, which has a key request information transmission unit for requesting a key.

  <Embodiment 12: Configuration>

  An example of functional blocks of the content reproduction apparatus in the twelfth embodiment is shown in FIG.

  The “content reproduction device” (2000) of the present embodiment shown in FIG. 20 includes an “encoded stream data storage unit” (2001), a “profile information reception unit” (2002), and a “content reproduction processing unit” (2003). ”, A“ key acquisition unit ”(2004), and a“ key request information transmission unit ”(2005). The “encoded stream data storage unit” (2001), “profile information receiving unit” (2002), “content reproduction processing unit” (2003), and “key acquisition unit” (2004) have already been described in the tenth embodiment. As stated.

  The “key request information transmission unit” (2005) performs processing for transmitting key request information. “Key request information” is information for requesting a key. Specifically, information that indirectly requests a key by designating a stream file that the user desires to watch corresponds to. A request may be issued to the profile information transmitting apparatus and the key sent in response thereto may be acquired by the key acquisition unit (2004).

  <Twelfth Embodiment: Process Flow>

  FIG. 21 shows the flow of processing in the twelfth embodiment. The content reproduction method according to the twelfth embodiment includes the following steps.

  Processing for transmitting key request information is performed (key request information transmission step, step S2101).

  The encoded stream data is accumulated (encoded stream data accumulation step Step S2102).

  The profile information encrypted with the key is received (profile information step reception step S2103). Here, the order of step S2102 and step S2103 may be reversed.

  Processing for acquiring a key for decrypting the received profile information is performed (key acquisition step, step S2104). The key to be acquired is transmitted from the profile information transmitting apparatus or the like in accordance with the key request information transmitted in step S2101.

  The profile information is decrypted using the acquired key (step S2105).

  Based on the profile information, the encoded stream data stored in the encoded stream data storage step is reconstructed, and processing for content playback is performed (content playback processing step step S2105).

  <Embodiment 13: Overview>

  Embodiment 13 will be described. The present embodiment is the content reproduction apparatus according to the tenth embodiment, further including a key request information transmission unit that requests a key under the condition of a charging process.

  <Embodiment 13: Configuration>

  An example of functional blocks of the content reproduction apparatus in the thirteenth embodiment is as shown in FIG.

  The “content reproduction device” (2000) of the present embodiment shown in FIG. 20 includes an “encoded stream data storage unit” (2001), a “profile information reception unit” (2002), and a “content reproduction processing unit” (2003). ”, A“ key acquisition unit ”(2004), and a“ key request information transmission unit ”(2005). The “encoded stream data storage unit” (2001), “profile information receiving unit” (2002), “content reproduction processing unit” (2003), and “key acquisition unit” (2004) have already been described in the tenth embodiment. As stated.

  The “key request information transmission unit” (2005) performs processing for transmitting key request information on the condition of charging. The key request information may not be transmitted unless the user is charged. If the key is not requested, the key cannot be acquired, so that the profile information cannot be decrypted and the content cannot be reproduced.

  <Embodiments 10 to 13: Effects>

  By encrypting the profile information, it is possible to deliver the entire content to the user while hiding only a part thereof. Since the part to be hidden is set by setting the profile information, not the contents, it can be added or changed relatively easily. In addition, since it is possible for the viewer to reproduce the content by acquiring only the key, it is not necessary to download the entire content again after viewing the sample version as in the past. effective.

  In addition, since the key has a smaller amount of data than the profile information, there is an advantage that the time required for the receiving side to acquire the key is very short. Even when an actual transaction is performed by a key transaction, the amount of key data is small, so that the load on both sides of the transaction can be minimized.

Furthermore, the key acquisition can be requested according to the user's wish, which is convenient for the user.
<< Embodiment 14 >>

  <Embodiment 14: Overview>

  Embodiment 14 will be described. The present embodiment is the content reproduction apparatus according to the third embodiment, wherein reproduction processing is performed by reconstructing from a plurality of distributed stream data.

  <Embodiment 14: Configuration>

  An example of functional blocks of the content reproduction apparatus according to the fourteenth embodiment is as shown in FIG.

  The “content reproduction device” (0800) of the present embodiment shown in FIG. 8 includes an “encoded stream data storage unit” (0801), a “profile information reception unit” (0802), and a “content reproduction processing unit” (0803). ).

  The “encoded stream data storage unit” (0801) stores encoded stream data in which a plurality of stream data are distributed and arranged.

  “Distributed arrangement” refers to arranging a plurality of stream data separately. For example, even for a single content made up of video and audio stream files, the encoded stream data may have to be stored in pieces, depending on the status of the line on which the download is performed. Specifically, each stream file is accumulated in small pieces in the order in which the contents are reproduced. Even in such a case, the content can be reconstructed from the stream data required by the content reproduction processing unit.

  The “content reproduction processing unit” (0803) reconstructs only necessary stream data from the encoded stream data based on the profile information.

  FIG. 22 shows the concept of processing for reconstructing only necessary encoded stream data. As shown in the figure, a plurality of encoded stream data (video, sound effect, music) are accumulated in a discrete manner. When viewing music, profile information for music playback is acquired. Here, the same encoded stream data is assigned the same ID, so that it is possible to distinguish which encoded stream data is part of. Therefore, it is possible to reconstruct specific stream data by extracting and collecting portions of encoded stream data having the same ID and combining them in the content reproduction apparatus to form one piece of music content.

  <Embodiment 14: Effect>

  If the capacity of the content playback apparatus is low and a large number of stream files cannot be downloaded and stored at once, it is convenient to be able to distribute them. In other words, even in the case of content with a large capacity, each stream file can be stored in small pieces at night when the line is free, which is advantageous in that the download can be performed smoothly.

  The distributed stream files can be integrated and arranged in accordance with the profile information to form a single file, which can be moved to a portable medium or the like.

Also, when each stream file is accumulated in small pieces, if the playback is started from the beginning by distributing the content in the order of playback, the preparation for playback is completed in a short time and the top part is being played back. It is also possible to prepare for the second half playback.
<< Embodiments 15 to 16 >>

  <Embodiment 15: Overview>

  Embodiment 15 will be described. The present embodiment is a content playback apparatus that performs playback processing of content data hierarchized by scalability.

  <Embodiment 15: Configuration>

  An example of functional blocks of the content reproduction apparatus in the fifteenth embodiment is shown in FIG.

  The “content playback device” (2300) of this embodiment shown in FIG. 23 includes a “content data playback unit” (2301), a “basic layer acquisition unit” (2302), and a “higher layer acquisition unit” (2303). Consists of.

  The “content data reproduction unit” (2301) reproduces content data hierarchized by scalability. That is, the basic layer information essential for reproducing the content, or the basic layer information and the higher layer information used for reproducing the content with high scalability are reproduced.

  “Scalability” refers to a parameter for encoding so that a bit stream according to the resolution and communication state of the receiver can be obtained on the receiving side. By using the scalability, for example, a low image quality to a high image quality, or a low bit rate to a high bit rate can be used according to various conditions at that time.

  The “basic layer information” is basic data essential for reproduction of the content. On the other hand, “higher layer information” is data used to improve image quality and improve transmission efficiency in the reproduction of the content. The basic layer information can be reproduced only by this, but has a drawback that the image is rough. On the other hand, reproduction itself is impossible only with high layer information. Here, by combining the basic layer information and the higher layer information, for example, reproduction at a high rate and high resolution becomes possible.

  The “base layer acquisition unit” (2302) acquires the base layer information. The acquired basic layer information is passed to the content data reproducing unit.

  The “higher layer acquisition unit” (2303) acquires the higher layer information. The acquired higher layer information is passed to the content data reproduction unit.

  <Embodiment 15: Flow of processing>

  FIG. 24 shows the flow of processing in the fifteenth embodiment. The content reproduction method according to the fifteenth embodiment includes the following steps.

  Base layer information is acquired (base layer acquisition step step S2401).

  Higher layer information is acquired (higher layer acquisition step step S2402). The order of step S2401 and step S2402 may be reversed.

  Whether basic layer information, basic layer information, or higher layer information is reproduced (content data reproduction step S2403).

  <Embodiment 16: Overview>

  Embodiment 16 is the content playback apparatus according to embodiment 15, characterized in that the scalability is temporal or / and spatial scalability and / or SNR (signal to noise ratio) scalability.

  <Embodiment 16: Configuration>

  An example of functional blocks of the content reproduction apparatus according to the sixteenth embodiment is as shown in FIG.

  The “content playback device” (2300) of this embodiment shown in FIG. 23 includes a “content data playback unit” (2301), a “basic layer acquisition unit” (2302), and a “higher layer acquisition unit” (2303). Consists of. The processing of each unit has been described in the fifteenth embodiment.

  In the “content data reproduction unit” (2301), when reproducing content data hierarchized by scalability, the scalability is temporal or / and spatial scalability, or SNR (signal to noise ratio) scalability. It has the characteristics.

  “Spatial scalability” is a parameter indicating the degree of spatial resolution (number of pixels). A layer having a small spatial resolution is a basic layer, and a layer having a large spatial resolution is a higher layer. The higher layer information is predicted not only from a plurality of higher layer information, but also from image information obtained by enlarging the basic layer. As a result, more efficient encoding can be performed than when the two image sequences are encoded separately.

  “Time scalability” is a parameter indicating the degree of temporal resolution (number of frames). A layer having a small temporal resolution is a basic layer, and a layer having a large temporal resolution is a higher layer. Efficiently transmit data with different frame frequencies.

  “SNR scalability” is a parameter indicating the degree of DCT coefficient quantization accuracy. SNR (Signal to Noise Ratio) indicates a signal-to-noise ratio. Two images with different image quality can be sent efficiently at the same time.

  FIG. 25 is a diagram showing layer information classified by resolution. Here, basic layer information and three levels of higher layer information are shown. The basic layer information has the lowest image quality, and becomes high-quality information in the order of the Video CD level, the DVD level, and the high vision level. Since it is impossible to reproduce only with the higher layer information, it can be combined with the basic layer information. Various combinations can be made such as adding basic layer information and high-level layer information at the Video CD level, and adding high-level layer information at the DVD level to the combination.

  FIG. 26 is a diagram illustrating a mechanism of scalability. Even if the basic layer information is expanded to obtain higher layer information, the image quality is deteriorated. Therefore, it is possible to improve the image quality by adding higher layer information as an extension layer to the layer information obtained by decompression.

  <Embodiments 15 and 16: Effects>

The content data is hierarchically encoded with scalability, and the basic layer information essential for the playback of the content and the higher layer information for improving the image quality are acquired as necessary, and an optimal playback method can be taken it can.
<< Embodiments 17 to 19 >>

  <Embodiment 17: Overview>

  Embodiment 17 is the content reproduction apparatus according to Embodiment 15 characterized in that the base layer is used for previewing the content.

  <Embodiment 17: Configuration>

  An example of functional blocks of the content reproduction apparatus in the seventeenth embodiment is as shown in FIG.

  The “content playback device” (2300) of this embodiment shown in FIG. 23 includes a “content data playback unit” (2301), a “basic layer acquisition unit” (2302), and a “higher layer acquisition unit” (2303). Consists of. The processing of each unit has been described in the fifteenth embodiment.

  The base layer acquired by the “base layer acquisition unit” (2302) is content data used for content preview. When the content is reproduced with only the basic layer information, the image becomes rough. However, when the content is used for previewing the content, the roughness of the image may be allowed, so the basic layer information is used as a preview. When the user views this preview and desires to view a higher quality content, the user uses the higher layer information. Use of the higher layer information will be described in an eighteenth embodiment.

  <Embodiment 18: Overview>

  The eighteenth embodiment is the content reproduction device according to the seventeenth embodiment, characterized by having a higher layer billing processing unit for reproduction using higher layer information.

  <Embodiment 18: Configuration>

  FIG. 27 shows an example of functional blocks of the content playback apparatus in the eighteenth embodiment.

  The “content playback device” (2700) of this embodiment shown in FIG. 27 includes a “content data playback unit” (2701), a “basic layer acquisition unit” (2702), and a “higher layer acquisition unit” (2703). Further, it includes a “higher layer billing processing unit” (2704). The “content data reproduction unit” (2701), the “basic layer acquisition unit” (2702), and the “higher layer acquisition unit” (2703) are described in the fifteenth embodiment.

  The “higher layer billing processing unit” (2704) performs processing for enabling playback using the higher layer information acquired by the higher layer acquisition unit on the condition of charging. In the seventeenth embodiment, when a preview is viewed and a higher quality content is desired to be viewed, playback is performed using higher layer information.

  Specifically, a content such as a movie can be first downloaded with a low image quality (basic layer information) and viewed for trial, and if the user likes it, a content with a high image quality (higher layer information) can be purchased. The basic layer information is about 200 kbps. After downloading this, the high-level layer information (about 800 kbps) at the Video CD level is purchased and downloaded. In combination, the video CD level movie can be played back at about 1 Mbps. If it is desired to view at a higher image quality, DVD level high-level layer information (about 4 Mbps) is separately purchased and downloaded, so that a DVD level movie can be played back at a total of about 5 Mbps. At the time of purchase, as already described, it is assumed that the charging process may be performed even if the charging process is not actually completed.

  <Embodiment 19: Overview>

  The nineteenth embodiment is the content reproduction device according to the seventeenth embodiment, characterized by having a base layer billing processing unit for playback using base layer information.

  <Embodiment 19: Configuration>

  FIG. 28 shows an example of functional blocks of the content playback apparatus in the nineteenth embodiment.

  The “content reproduction device” (2800) of the present embodiment shown in FIG. 28 includes a “content data reproduction unit” (2801), a “basic layer acquisition unit” (2802), and a “higher layer acquisition unit” (2803). Further, it comprises a “base layer billing processing unit” (2804). The “content data reproduction unit” (2801), the “basic layer acquisition unit” (2802), and the “higher layer acquisition unit” (2803) are described in the fifteenth embodiment.

  The “base layer billing processing unit” (2804) performs processing for enabling playback using the base layer information acquired by the base layer acquiring unit on the condition of charging. When the base layer information is used, playback may be performed on the condition that the process for charging is used. In this case, the higher layer information has already been downloaded, but the content cannot be reproduced because there is no basic layer information. Therefore, after purchasing and acquiring the basic layer information, it is possible to reproduce with high image quality by appropriately combining with the higher layer information. At this time, high-quality reproduction is possible because of the higher layer information, but the charge for reproducing the basic layer information may be lower than that for reproducing the higher layer information in the eighteenth embodiment.

  <Embodiments 17 to 19: Effects>

When reproducing the content, the user can select the higher layer information from a plurality of levels and view it with desired image quality.
<< Embodiments 20-23 >>

  <Embodiment 20: Overview>

  Embodiment 20 is the content playback apparatus according to embodiment 15, wherein the base layer acquisition unit acquires base layer information to be broadcast.

  <Embodiment 20: Configuration>

  An example of functional blocks of the content reproduction apparatus in the twentieth embodiment is as shown in FIG.

  The “content playback device” (2300) of this embodiment shown in FIG. 23 includes a “content data playback unit” (2301), a “basic layer acquisition unit” (2302), and a “higher layer acquisition unit” (2303). Consists of. The processing of each unit has been described in the fifteenth embodiment.

  The “base layer acquisition unit” (2302) acquires base layer information to be broadcast. “Broadcast” refers to sending audio or audio and video to a receiving device by radio waves for the purpose of being listened to by many people simultaneously. In addition to wireless, it may also include those that are wired. In some cases, Internet broadcasts (services that provide multimedia information such as voice and video on the Internet) may be included.

  Specifically, content with coarse images, which is content data of basic layer information, is broadcast. The user can already hold the high layer information and synthesize it with the content data of the broadcast basic layer information to view the high quality reproduction. A method of acquiring the higher layer information will be described later.

  <Embodiment 21: Overview>

  Embodiment 21 is the content playback apparatus according to embodiment 20, wherein the higher layer acquisition unit acquires higher layer information through communication.

  <Embodiment 21: Configuration>

  An example of functional blocks of the content reproduction apparatus in the twenty-first embodiment is as already shown in FIG.

  The “content playback device” (2300) of this embodiment shown in FIG. 23 includes a “content data playback unit” (2301), a “basic layer acquisition unit” (2302), and a “higher layer acquisition unit” (2303). Consists of. The processing of each unit has been described in the twentieth embodiment.

  The “higher layer acquisition unit” (2303) acquires higher layer information through communication. “Communication” refers to transmission of signals such as voice and images in place of electrical signals. In general, transmission is performed in a one-to-one relationship. In the twentieth embodiment, the higher layer information is transmitted prior to the broadcast of the basic layer information. In the content reproduction apparatus, the higher layer information acquired by communication is synthesized while receiving the basic layer information by broadcasting. In this broadcast, the image is still rough, but it can be viewed with high image quality by purchasing higher layer information.

  <Embodiment 22: Overview>

  Embodiment 22 is the content playback apparatus according to embodiment 15, wherein the base layer acquisition unit acquires base layer information through communication.

  <Embodiment 22: Configuration>

  An example of functional blocks of the content reproduction apparatus in the twenty-second embodiment is as already shown in FIG.

  The “content playback device” (2300) of this embodiment shown in FIG. 23 includes a “content data playback unit” (2301), a “basic layer acquisition unit” (2302), and a “higher layer acquisition unit” (2303). Consists of. The processing of each unit has been described in the fifteenth embodiment.

  The “base layer acquisition unit” (2302) acquires base layer information through communication. When basic layer information essential for content reproduction is necessary, it is obtained by downloading through communication. In this case, even if the higher layer information has already been downloaded, the content cannot be reproduced because there is no basic layer information. Therefore, after purchasing and acquiring the basic layer information, it is possible to reproduce with high image quality by appropriately combining with the higher layer information. A method of acquiring the higher layer information will be described later.

  <Embodiment 23: Overview>

  Embodiment 23 is the content reproduction device according to embodiment 22, wherein the higher layer acquisition unit acquires higher layer information to be broadcast.

  <Embodiment 23: Configuration>

  An example of functional blocks of the content reproduction apparatus in the twenty-third embodiment is as already shown in FIG.

  The “content playback device” (2300) of this embodiment shown in FIG. 23 includes a “content data playback unit” (2301), a “basic layer acquisition unit” (2302), and a “higher layer acquisition unit” (2303). Consists of. The processing of each unit has been described in the fifteenth embodiment.

  The “higher layer acquisition unit” (2303) acquires higher layer information to be broadcast. In the content reproduction apparatus, the basic layer information acquired by communication is synthesized while receiving the higher layer information by broadcasting. Although it cannot be viewed only by the main broadcast, it can be reproduced by purchasing the basic layer information, and can be viewed with high image quality.

  <Embodiments 20 to 23: Effects>

  When basic layer information is broadcast and higher layer information is distributed by communication, it can be viewed as it is, but there is an advantage that it can be individually handled when higher quality playback is desired. is there.

On the other hand, when high-level layer information is broadcast and basic layer information is distributed by communication, it cannot be viewed unless the basic layer information is purchased or acquired, so that a specific user It is effective in the case of a mode in which only viewing is performed.
<< Embodiment 24 >>

  <Embodiment 24: Overview>

  The embodiment 24 is a content reproduction apparatus having a layer information storage unit that stores either basic layer information or higher layer information.

  <Embodiment 24: Configuration>

  FIG. 29 shows an example of functional blocks of the content reproduction apparatus in the twenty-fourth embodiment.

  The “content playback device” (2900) of the present embodiment shown in FIG. 29 includes a “layer information storage unit” (2901) and an “other layer layer information processing unit” (2902).

  The “layer information storage unit” (2901) stores either the base layer information or the higher layer information.

  The “other layer layer information processing unit” (2902) acquires higher layer information or basic layer information which is information of a layer different from the information stored in the layer information storage unit. That is, when the basic layer information is accumulated in the layer information accumulation unit, the higher layer information is acquired and reproduced. On the other hand, when the higher layer information is stored in the layer information storage unit, the basic layer information is acquired and played back. It is also possible to synthesize and reproduce layer information accumulated in advance while receiving a broadcast.

  <Embodiment 24: Process flow>

  FIG. 30 shows the flow of processing in the twenty-fourth embodiment. The content reproduction method according to the twenty-fourth embodiment includes the following steps.

  It is determined whether the accumulated layer information is basic layer information or higher layer information (step S3001).

  In the case of the determination result that it is the basic layer information, the higher layer information is acquired (step S3002).

  If it is determined that the information is higher layer information, basic layer information is acquired (step S3003).

The basic layer information and the higher layer information are synthesized and reproduced (step S3004).
<< Embodiment 25 >>

  <Embodiment 25: Overview>

  The twenty-fifth embodiment is a content reproduction apparatus that synchronizes basic layer information and higher layer information using a time stamp.

  <Embodiment 25: Configuration>

  FIG. 31 shows an example of functional blocks of the content playback apparatus in the twenty-fifth embodiment.

  The “content playback device” (3100) of this embodiment shown in FIG. 31 includes a “content data playback unit” (3101), a “basic layer acquisition unit” (3102), and a “higher layer acquisition unit” (3103). , “Inter-layer synchronization unit” (3104). The “content data reproduction unit” (3101), the “basic layer acquisition unit” (3102), and the “higher layer acquisition unit” (3103) have already been described in the first embodiment.

  The “inter-layer synchronization unit” (3104) synchronizes layers during playback based on time stamp information stamped in units of a set of frames composed of one or more frames.

  A “frame” refers to a single screen constituting a moving image or a still image. The image data is a collection of consecutive frames that have gradually passed.

  “Time stamp information” refers to time data assigned to a stream file that is an aggregate of frames in which a plurality of frames are arranged in time order.

Here, the stream file is generated based on each layer information. Each layer information is associated with the generated stream file. However, since the basic layer information and the higher layer information have different amounts of information, if the stream file associated with each layer information is reproduced as it is, a difference occurs in the transmission time, and eventually the image shifts to an image. May occur. Accordingly, it is necessary that the standard time given to the original moving image stream is associated with the stream file by each layer information. Specifically, it is realized by giving data of the time counted from the head part at the time of reproduction to the stream file at every predetermined interval frame. At the time of reproduction, each layer information can be synchronized by comparing the original moving picture stream with the time stamp information of the basic layer information and the higher layer information.
<< Embodiment 26 >>

  <Embodiment 26: Overview>

  The twenty-sixth embodiment is the content playback apparatus according to the twenty-fifth embodiment, characterized in that the base layer information and the higher layer information are synchronized in GOP units or frame units.

  <Embodiment 26: Configuration>

  An example of functional blocks of the content reproduction apparatus in the twenty-sixth embodiment is as shown in FIG.

  The “content playback device” (3100) of this embodiment shown in FIG. 31 includes a “content data playback unit” (3101), a “basic layer acquisition unit” (3102), and a “higher layer acquisition unit” (3103). , “Inter-layer synchronization unit” (3104). The “content data reproduction unit” (3101), the “basic layer acquisition unit” (3102), and the “higher layer acquisition unit” (3103) have already been described in the first embodiment.

  The “inter-layer synchronization unit” (3104) includes time stamp information stamped in GOP (group of picture) units or frame units of the base layer information acquired in the base layer acquisition unit, and the higher layer acquisition unit The processing for synchronizing the layers at the time of reproduction is performed based on the time stamp information stamped in GOP (group of picture) units or frame units of the higher layer information acquired in step S2.

  “GOP (Group of Pictures)” refers to a data group composed of a plurality of screens as a unit of random access in an MPEG moving picture stream.

  The GOP is composed of a plurality of frames. MPEG2 combines intra-frame compression and inter-frame compression to efficiently compress moving images.

  Here, the intra-frame compression is a compression using spatial correlation in which adjacent pixels do not change so much (similar luminance continues), and a frame using only this intra-frame compression is an I frame. That's it. On the other hand, inter-frame compression is a compression that uses the correlation between frames in which adjacent frames do not change much (similar ones appear), and uses the correlation with the previous (past) I frame. The type is a P frame, and the frame compressed using the correlation with the preceding and following (past and future) I frames is called a B frame. Efficient compression can be achieved by omitting the same parts as past and future frames and converting only the different parts into data. A GOP is a sequence of one or more I frames that stand alone as still images, and P frames and B frames that refer to them. An MPEG video stream is a sequence header for synchronization with this GOP. The data with is repeated. The P frame and the B frame compressed in this way do not become a single image by itself, but the front and rear I frames are always required.

  FIG. 32 shows how to synchronize the basic layer information and the higher layer information using a time stamp. There is a movie stream with basic layer information and a movie stream with higher layer information. Here, time stamp information representing the fifth minute is recorded at a position corresponding to each layer information every fifth minute of the reproduction time of the original moving image stream. By synthesizing while confirming this association, it is possible to reproduce accurately synchronized.

  In addition, time stamp information may be imprinted in absolute time. The absolute time is effective when the broadcast start time of the content is determined. For example, if the broadcasted layer information starts at 8:30 pm on April 1, it is stored to be combined with the layer information broadcasted or sent via communication. In the layer information, time stamp information is recorded every fifth minute from 8:30 pm on April 1.

  The unit to which the time stamp information is added may be stamped in frame units as well as in GOP units. In the case of imprinting in units of GOP, it is assumed that it is added to the GOP sequence header. In the case of imprinting in units of frames, time stamp information may be attached to all of the aforementioned I frame, B frame, and P frame, or any particular frame may be attached.

When adding time stamp information to a specific frame, the I frame is suitable. An I frame is a frame that uses only intraframe compression using spatial correlation, where adjacent pixels do not change much (similar brightness continues), whereas a P frame The B frame is a frame using the correlation with the (previous) I frame, and the B frame is a frame compressed using the correlation with the preceding and succeeding (past and future) I frames. Therefore, the P frame and the B frame depend on the I frame. On the other hand, since the I frame is repeated at specific intervals, it can be said that it is suitable for adding time stamp information.
<< Embodiment 27 >>

  <Embodiment 27: Overview>

  The twenty-seventh embodiment is a content reproduction device that synchronizes basic layer information and higher layer information by ID.

  <Embodiment 27: Configuration>

  An example of functional blocks of the content reproduction apparatus in the twenty-seventh embodiment is as shown in FIG.

  The “content playback device” (3100) of this embodiment shown in FIG. 31 includes a “content data playback unit” (3101), a “basic layer acquisition unit” (3102), and a “higher layer acquisition unit” (3103). , “Inter-layer synchronization unit” (3104). The “content data reproduction unit” (3101), the “basic layer acquisition unit” (3102), and the “higher layer acquisition unit” (3103) have already been described in the first embodiment.

  The “inter-layer synchronization unit” (3104) performs processing for synchronizing layers during reproduction based on ID information stamped in units of sets of frames composed of one or more frames.

  “ID information” is information to which a code that can identify each corresponding element is assigned. The difference from the twenty-sixth embodiment is that the original video stream does not need to be associated with the stream file by each layer information. If the stream files are associated with each other based on the layer information, synchronized playback is possible.

  FIG. 33 shows how to synchronize basic layer information and higher layer information using ID. There is a movie stream with basic layer information and a movie stream with higher layer information. Here, ID information is allocated so that each layer information can be synchronized. By synthesizing while confirming the correspondence between the layer information, it is possible to perform reproduction that is accurately synchronized. The same code may be assigned to both IDs, or different IDs may be assigned to check the correspondence in the correspondence table. The latter method can further enhance security protection.

  <Embodiments 25-27: Effects>

Synchronized playback is possible by associating the base layer information with the higher layer information.
<< Embodiment 28 >>

  <Embodiment 28: Overview>

  The twenty-eighth embodiment is a cache server for synthesizing content data layered by scalability and transmitting it to a content reproduction terminal.

  FIG. 34 shows an example of the concept of the present embodiment. As shown in the figure, the cache server of the present embodiment plays a role of mediating between the profile information transmission device and the content transmission device. This is provided in preparation for a case where the content reproduction apparatus does not have a data reconstruction function (for example, when the content reproduction apparatus is a mobile phone or the like). In the cache server, reproduction data is generated based on the sent profile information and layer information and transmitted to the content reproduction apparatus. Here, since the transmission band between the cache server and the content reproduction apparatus is sufficiently large, it is assumed that high-speed transmission is possible even if the capacity of the generated reproduction data is large.

  Here, the transmission device and the cache server can be connected by a normal Internet network (slow speed), while the cache server and the content reproduction device can be a high-speed network such as ADSL or FTTH. Thus, high-speed transmission can be performed between the cache server and the content reproduction apparatus.

  <Embodiment 28: Configuration>

  An example of a functional block of the cache server in the twenty-eighth embodiment is shown in FIG.

  The “cache server” (3500) of the present embodiment shown in FIG. 35 includes a “content data composition unit” (3501), a “basic layer acquisition unit” (3502), a “higher layer acquisition unit” (3503), “Data transmission unit” (3504).

  The “base layer acquisition unit” (3502) acquires base layer information.

  The “higher layer acquisition unit” (3503) acquires higher layer information.

  The acquisition may include a case of generating (accumulating) inside as well as a case of obtaining from outside (for example, a content transmission device). Each acquired layer information is passed to the content data composition unit (3501).

  The “content data composition unit” (3501) synthesizes the basic layer information and the higher layer information into composite data. The synthesized data obtained by the synthesis is data including high layer information and capable of high quality reproduction. The composite data is passed to the data transmission unit (3504).

  The “data transmission unit” (3504) transmits basic layer information essential for reproduction of the content or synthesized data synthesized by the content data synthesis unit. Here, if the base layer information is present, the content can be reproduced. Therefore, in consideration of the playback capability of the content playback device that receives data, either the base layer information or the composite data is appropriately transmitted to the content playback device.

  <Embodiment 28: Process flow>

  FIG. 36 shows the flow of processing in the twenty-eighth embodiment. The content composition method in the cache server in the twenty-eighth embodiment includes the following steps.

  Base layer information is acquired (base layer acquisition step S3601).

  Higher layer information is acquired (higher layer acquisition step S3602). The order of step S3601 and step S3602 may be reversed.

  The base layer information and the higher layer information are combined to form combined data (content data combining step Step S3603).

  It is determined whether to transmit base layer information or composite data according to the transmission destination (determination step step S3604).

  If the determination result in the determination step (step S3604) is a determination result indicating that data essential for reproduction of the content should be transmitted, the base layer information is transmitted (step S3605).

If the determination result of the determination step (step S3604) is the determination result that the data combined in the content data combining step (step S3603) should be transmitted, it is transmitted whether it is combined data (step S3606).
<< Embodiment 29 >>

  <Embodiment 29: Overview>

  The twenty-ninth embodiment is the cache server according to the twenty-eighth embodiment, which is characterized by having a higher layer information storage unit that stores higher layer information.

  <Embodiment 29: Configuration>

  An example of a functional block of the cache server in the twenty-ninth embodiment is shown in FIG.

  The “cache server” (3700) of the present embodiment shown in FIG. 37 includes a “content data composition unit” (3701), a “basic layer acquisition unit” (3702), a “higher layer acquisition unit” (3703), It consists of a “data transmission unit” (3704) and a “higher layer information storage unit” (3705). The “content data composition unit” (3701), the “basic layer acquisition unit” (3702), and the “data transmission unit” (3704) are the same as those in the twenty-eighth embodiment.

  The “higher layer information storage unit” (3705) stores higher layer information. In the present embodiment, it is possible to immediately respond to the user's wishes by accumulating and preparing a large number of types of higher layer information in advance.

The “higher layer acquisition unit” (3703) acquires higher layer information from the higher layer information storage unit. At this time, higher layer information corresponding to a user's desired level (for example, a high vision level) may be acquired.
<< Embodiment 30 >>

  <Embodiment 30: Overview>

  The thirtieth embodiment is the cache server according to the twenty-eighth embodiment, which is characterized by having a billing processing unit for processing for billing.

  <Embodiment 30: Configuration>

  An example of a functional block of the cache server in the thirtieth embodiment is shown in FIG.

  The “cache server” (3800) of this embodiment shown in FIG. 38 includes a “content data composition unit” (3801), a “basic layer acquisition unit” (3802), a “higher layer acquisition unit” (3803), It consists of a “data transmission unit” (3804), a “billing processing unit” (3805), and a “determination unit” (3806). The “content data composition unit” (3801), the “basic layer acquisition unit” (3802), and the “higher layer acquisition unit” (3803) are the same as those in the twenty-eighth embodiment.

  The “billing processing unit” (3805) identifies a playback terminal and performs processing for charging.

  By using the information acquired from the content transmission device or the like, the content reproduction device can reproduce the content. Therefore, a user such as a content transmission device can charge a user according to the transmitted information for the content reproduction device. Here, since the cache server plays a role of mediating both, it is possible to perform processing for charging the user of the corresponding content reproduction apparatus in response to a request from the content transmission apparatus or the like.

  The cache server may receive the base layer information from the content transmission device on condition that the processing for charging from the content reproduction device is a condition. Alternatively, the composite data generated from the received basic layer information or the like may be transmitted to the content reproduction device on the condition of processing for charging.

  At this time, since the charging process (amount, method, etc.) differs for each content reproduction device, identification of the content reproduction device is important. The identification method corresponds to adding an identification code of the content reproduction apparatus to layer information or the like.

  The “determination unit” (3806) determines whether or not a process for charging is performed on the playback terminal that transmits data.

  The reason why the determination is made is to transmit the generated composite data to the content reproduction apparatus on the condition of charging. In the case of a determination result that processing for charging has not been performed, the subsequent processing may not be performed.

  The “data transmission unit” (3804) performs transmission when the determination result of the determination unit is a determination result that processing for charging is being performed.

  In the case of a determination result that processing for charging is being performed, transmission of composite data or the like is possible by permission of transmission from the determination unit (3806).

  <Embodiments 28-30: Effects>

  By mediating the cache server, it is possible to reproduce content even when the content reproduction apparatus does not have a stream reconstruction function (for example, a mobile phone).

  Further, when a plurality of cache servers are arranged, it is not preferable in accordance with the copyright law to place a copy of the movie work itself. In that case, if data that cannot be reproduced by itself, such as high layer information, is placed and the basic layer information is received and acquired as necessary, the high layer information itself is not a completed work. Legally acceptable.

  In addition, a normal Internet network (slow speed) is used between the transmission device and the cache server, a high-speed network such as ADSL or FTTH is used between the cache server and the terminal, and contents are placed on the cache server. Even if you do not go to the sending device, you can get the content at high speed if you go to the cache server where the copy is placed.

Conceptual diagram for explaining the first embodiment Functional block diagram for explaining the first embodiment A diagram showing an example of content identification information and profile information The figure which showed an example of profile information generated when purchasing contents partially The flowchart which showed the flow of the specific process in Embodiment 1. Functional block diagram for explaining the second embodiment The flowchart which showed the flow of the process in Embodiment 2. Functional block diagram for explaining the third embodiment The flowchart which showed the flow of the 1st process in Embodiment 3. The flowchart which showed the flow of the 2nd process in Embodiment 3. Functional block diagram for explaining the sixth embodiment The flowchart which showed the flow of the process in Embodiment 6. Functional block diagram for explaining the seventh embodiment The flowchart which showed the flow of the process in Embodiment 7. The figure which showed the flow of the accounting process in Embodiment 8. Functional block diagram for explaining the tenth embodiment The flowchart which showed the flow of the process in Embodiment 10. The figure which showed the 1st example regarding the acquisition method of the key in Embodiment 11 The figure which showed the 2nd example regarding the acquisition method of the key in Embodiment 11. Functional block diagram for explaining the twelfth embodiment The flowchart which showed the flow of the process in Embodiment 12. The figure which showed the concept about the process which reconfigure | reconstructs the encoding stream data in Embodiment 14. Functional block diagram for explaining the fifteenth embodiment The flowchart which showed the flow of the process in Embodiment 15. The figure which showed what classified the layer information in Embodiment 16 by the resolution The figure which showed the mechanism of the scalability in Embodiment 16. Functional block diagram for explaining the eighteenth embodiment Functional block diagram for explaining the nineteenth embodiment Functional block diagram for explaining the twenty-fourth embodiment The flowchart which showed the flow of the process in Embodiment 24. Functional block diagram for explaining the twenty-fifth embodiment The figure which showed how to take the synchronization using the time stamp in Embodiment 25 The figure shown about how to take the synchronization using ID in Embodiment 26 Conceptual diagram for describing the twenty-eighth embodiment. Functional block diagram for explaining the twenty-eighth embodiment 28 is a flowchart showing the flow of processing in embodiment 28. Functional block diagram for explaining the twenty-ninth embodiment Functional block diagram for explaining the embodiment 30 The flowchart which showed the flow of the process in Embodiment 1. 10 is a flowchart showing a content reproduction method according to the fifth embodiment.

Explanation of symbols

0200 Profile information transmission device 0201 Profile information acquisition unit 0202 Content identification information acquisition unit 0203 Profile information transmission unit

Claims (30)

A profile information acquisition unit that acquires profile information including information necessary for enabling reproduction according to the combination of stream files of content that can be configured from a combination of a plurality of stream files;
A content identification information acquisition unit that acquires content identification information that is information for identifying the content;
A profile information transmission unit that transmits the profile information acquired by the profile information acquisition unit in association with the content identification information acquired by the content identification information acquisition unit;
A profile information transmitting apparatus having: A content identification information acquisition unit that acquires content identification information that is information for identifying the content;
A stream data encoding unit that encodes the stream file of content that can be configured from a combination of a plurality of stream files to obtain encoded stream data; and
An encoded stream data transmission unit that transmits the encoded stream data encoded by the stream data encoding unit and the content identification information acquired by the content identification information acquisition unit in association with each other;
A content transmitting apparatus having: An encoded stream data storage unit for storing the encoded stream data;
A profile information receiver for receiving profile information;
A content reproduction processing unit for reconstructing the encoded stream data stored in the encoded stream data storage unit based on the profile information received by the profile information receiving unit and performing processing for content reproduction;
A content reproduction apparatus having An encoded stream data storage step for storing the encoded stream data;
A profile information receiving step of receiving profile information after the encoded stream data storage step;
A content playback processing step for reconstructing the encoded stream data stored in the encoded stream data storage step based on the profile information received in the profile information receiving step and performing processing for content playback;
A content playback method comprising: A profile information receiving step for receiving profile information;
An encoded stream data storage step of storing encoded stream data after the profile information receiving step;
A content playback processing step for reconstructing the encoded stream data stored in the encoded stream data storage step based on the profile information received in the profile information receiving step and performing processing for content playback;
A content playback method comprising:   The profile information transmitting apparatus according to claim 1, further comprising a profile information request receiving unit for receiving a profile information request which is a request for transmitting profile information.   The content reproduction apparatus according to claim 3, further comprising a profile information request transmission unit for transmitting a profile information request.   The content reproduction apparatus according to claim 7, further comprising a profile information request transmission unit configured to transmit a profile information request on the condition of charging processing.   The profile information transmitting apparatus according to claim 1, wherein the profile information is information related to content reproduction according to at least one of an audio stream and a video stream.   4. The content reproduction according to claim 3, wherein the profile information is encrypted with a key, and the content reproduction apparatus includes a key acquisition unit for acquiring a key for decrypting the profile information according to the profile information. apparatus.   4. The profile information is encrypted with a key, and the content reproduction apparatus has a key acquisition unit for acquiring a key for decrypting the profile information on the condition of charging processing according to the profile information. The content reproduction apparatus described in 1.   The content reproduction apparatus according to claim 10, further comprising a key request information transmitting unit for transmitting key request information that is information for requesting a key.   The content reproduction apparatus according to claim 10, further comprising a key request information transmitting unit configured to transmit key request information that is information for requesting a key on the condition of charging processing. The encoded stream data stored in the stream data storage unit is a distributed arrangement of a plurality of stream data,
The content reproduction apparatus according to claim 3, wherein the reproduction processing unit reconstructs only necessary stream data from the encoded stream data based on the profile information. A playback unit for content data hierarchized by scalability, which is basic layer information essential for playback of the content, or basic layer information and higher layer information used for playback of the content with high scalability. A content data playback unit to be played back;
A base layer acquisition unit for acquiring the base layer information;
A high layer acquisition unit for acquiring the high layer information;
A content reproduction apparatus having   16. The content reproduction apparatus according to claim 15, wherein the scalability is temporal or / and spatial scalability or SNR (signal to noise ratio) scalability.   The content playback apparatus according to claim 15, wherein the base layer acquired by the base layer acquisition unit is content data used for previewing content.   18. The content playback apparatus according to claim 17, further comprising: a higher layer billing processing unit for enabling playback using the higher layer information acquired by the higher layer acquisition unit on a charge basis.   18. The content playback apparatus according to claim 17, further comprising a base layer billing processing unit for enabling playback using base layer information acquired by the base layer acquisition unit on a charge basis.   The content reproduction apparatus according to claim 15, wherein the base layer acquisition unit acquires base layer information to be broadcast.   The content playback apparatus according to claim 20, wherein the higher layer acquisition unit acquires higher layer information through communication.   The content playback apparatus according to claim 15, wherein the base layer acquisition unit acquires base layer information through communication.   The content playback apparatus according to claim 22, wherein the higher layer acquisition unit acquires broadcasted higher layer information. A layer information accumulation unit for accumulating either the basic layer information or the higher layer information;
A content playback apparatus comprising: higher layer information that is information of a layer different from the information stored in the layer information storage unit, or another layer layer information processing unit that prompts processing for acquiring basic layer information. Content data playback unit hierarchized by scalability, which plays back basic layer information essential for playback of the content and higher layer information used for playback of the content with high scalability When,
A base layer acquisition unit for acquiring the base layer information;
A high layer acquisition unit for acquiring the high layer information;
An inter-layer synchronization unit that synchronizes layers at the time of reproduction based on time stamp information stamped in a set unit of frames composed of one or more frames;
A content reproduction apparatus having   The inter-layer synchronization unit is obtained by the GOP (group of picture) unit of the base layer information acquired by the base layer acquisition unit or the time stamp information stamped in frame units, and acquired by the higher layer acquisition unit 26. The content reproduction apparatus according to claim 25, wherein layers are synchronized at the time of reproduction based on time stamp information stamped in GOP (group of picture) units or frame units of higher layer information. Content data playback unit hierarchized by scalability, which plays back basic layer information essential for playback of the content and higher layer information used for playback of the content with high scalability When,
A base layer acquisition unit for acquiring the base layer information;
A high layer acquisition unit for acquiring the high layer information;
An inter-layer synchronization unit that synchronizes layers at the time of playback based on ID information stamped in units of a set of frames composed of one or more frames;
A content reproduction apparatus having A cache server for synthesizing content data layered by scalability and transmitting it to a playback terminal,
A base layer acquisition unit for acquiring base layer information;
A high layer acquisition unit for acquiring high layer information;
A content data composition unit that composes basic layer information and higher layer information into composite data;
A data transmission unit that transmits basic layer information essential for reproduction of the content or synthesized data synthesized by the content data synthesis unit;
A cache server with It has a high layer information storage unit that stores high layer information,
The cache server according to claim 28, wherein the higher layer acquisition unit acquires higher layer information from the higher layer information storage unit. A billing processing unit for identifying a playback terminal and processing for billing;
A determination unit that determines whether or not a billing process is performed on a playback terminal that transmits data;
29. The cache server according to claim 28, wherein the data transmission unit performs transmission when the determination result in the determination unit is a determination result indicating that processing for charging has been performed.

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