JP2012178622A - Content transmitter/receiver and content transmission method/reception method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transmit a content as a manufacturer intends, even when reproducing a content recorded on a recording medium by another system.SOLUTION: A content transmitter is provided with a recording medium 6, a content reading part 201, a reproduction information generation part 202, a content transmission part 203, and a network communication processing part 208. When transmitting the reproduction information of the content recorded in the recording medium to a content receiver, the transmitter converts the reproduction information into a format corresponding to a communication system between the content transmitter and the content receiver. Then, the content receiver reproduces the local content as the content designer intends.

Description

  The present invention relates to a content transmission device / reception device and a content transmission method / reception method.

  Recording media such as BDs and DVDs can record video and audio as well as interactive content, and can change a scene to be displayed by a user operation. In order to reproduce content as intended by the content creator as described above, as a problem described in Patent Document 1, “high density capable of recording information such as video and audio represented by DVD (Digital Video Disk) at high density” When interactive playback is performed using an information recording medium such as an optical disk, a desired restriction can be easily applied from the producer's side. "As a solution," DVD 1 can be accessed. " Each unit is divided into a plurality of VOBUs, each of which is composed of control information including main video information, audio information, and access information, and information is recorded on a recording track. A PGCI including reproduction procedure information defining a reproduction procedure of audio information and a first search prohibition flag indicating prohibition of search operation in a plurality of cells is a part of a recording track. When the search operation is designated, the information reproducing device S2 does not execute the search operation when it is prohibited by the first operation prohibition flag included in the PGCI. It includes a system controller 100 that controls each part of S2. "

  On the other hand, with the development of digital video signal processing technology, a digital tuner that receives digital broadcasts, a television with a built-in digital tuner (hereinafter referred to as DTV), and a digital recording device that records and plays back digital broadcast programs (for example, HDD recorders and DVDs). Digital AV devices such as (Digital Versatile Disc) recorders, BD (Blu-ray Disc) recorders, NAS (Network Attached Storage), etc.) have been commercialized one after another. In addition, with the spread of broadband / Internet, digital interfaces such as wired / wireless LAN (Local Area Network), IEEE 1394, USB (Universal Serial Bus), HDMI (High Definition Multimedia Interface) are installed on these PCs and digital AV devices. It has become possible to transmit digital content inside and outside the home via a network. In particular, DLNA (Digital Living Network Alliance) is widely used as a guideline for sharing digital contents using a network constructed in a home. Currently, many AV devices including PCs are selling products corresponding to DLNA in the market. When digital content is transmitted between digital AV devices, encryption is performed on the content transmission device side, and information for decryption is shared with the content reception device side, so that transmission can be performed at the transmission destination. Copy protection that prevents the creation of an unlimited copy is implemented so that the content is not decrypted by a device other than a content receiving device. As an example of such a copy protection method, a method described in Patent Document 2, for example, is adopted in a digital AV device. In the method described in Patent Document 2, content is “Copy free (can be copied without limitation)”, “Copy free with EPN asserted (can be copied without limitation with output protection)”, “Copy one generation (possible one generation copy)”, “No” It is classified and managed as “more copies (prohibit re-copying)” and “Copy never (copy-prohibited)”. The recording device records only the contents of “Copy free”, “Copy free with EPN asserted”, and “Copy one generation”. Once the “Copy one generation” content is recorded, it is handled as “No more copies” and encrypted on the network / bus, excluding the “Copy free” content. By performing processing and transmitting, unlimited content copying is prevented. Patent Document 3 discloses a technique for enhancing copyright protection of content during content transmission between devices. On the other hand, video / audio contents such as movies and music are recorded on optical disks such as BD, DVD, and CD (Compact Disc) and are widely distributed. When content that should be copyright-protected is recorded on an optical disc, copy protection technologies such as AACS (Advanced Access Content System), CSS (Content Scrambled Recording Media) DRM technology such as Content Protection Recordable Media (CPRM). Is used.

Japanese Patent Laid-Open No. 9-274776 JP 2005-269288 A JP 2010-119137 A

  In the prior art, content recorded on a recording medium such as a BD or DVD can be reproduced as intended by the producer only when the device itself such as a player is used. In addition, a technique for distributing such as a DTCP-IP standard that secures a secure communication path and can prevent unauthorized copying of content that deviates from the scope of personal use has already been disclosed. However, it is not considered that content recorded on a recording medium such as a BD or a DVD is transmitted to another device via a network as intended by the content creator.

  For example, although it is necessary to call attention to the content at the beginning of the content, a situation occurs in which the user skips the operation.

Therefore, the present invention provides, for example, as one embodiment, a content transmission device that reads content from a local content playback device;
A network control unit for connecting to the content receiving device and transferring information;
A reproduction information conversion unit that converts a reproduction control method for local content into a reproduction control method defined by a connection method with the content receiving device;
A content transmission unit that superimposes and transmits the reproduction information converted by the reproduction information conversion unit to the content;
Have
The reproduction information is converted into a format conforming to the communication standard and transmitted together with the content to the content receiving device.
Also, in response to the special playback request from the content receiving device, the playback information of the local content is referred to, priority is given to the playback according to the local content playback information, and this request can be made for the special playback request from the content receiving device. It is automatically executed when it becomes.

  When transmitting the local content to which the reproduction information is given, it can be reproduced as intended by the producer of the local content when viewed on the content receiving device connected to the local content reproducing device.

It is a block diagram explaining the whole structure containing the content transmission apparatus which concerns on this invention. It is a block diagram explaining a content transmitter and a receiver. It is a block diagram explaining a content transmitter and a receiver. Block diagram of playback control unit of content receiving apparatus Illustration of playback control section Image of playback when there is a playback request outside the section where playback is restricted Playback flowchart when there is a playback request outside the section where playback is restricted An example of content

  Hereinafter, an example of an embodiment suitable for the present invention will be described with reference to the drawings.

  In the present embodiment, a content receiving device such as a television or a PC views content transmitted from a content transmitting device via a network. FIG. 1 shows an overview of this embodiment. The content transmission apparatus 100 includes an optical disk drive 101 and a built-in storage 102, and can communicate with a television 103, which is a content reception apparatus, via a LAN (Local Area Network) 104.

  In the LAN 104, standard IP (Internet Protocol) is used as a network protocol, and TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are used as upper transport protocols. For transmission of content, higher-level application protocols such as RTP (Real-time Transport Protocol), HTTP (Hyper Text Transfer Protocol), FTP (File Transfer Protocol) and the like are used. Note that IP has IPv4 and IPv6 as the version differences, but is not limited to either. Further, although not shown in the figure, each device may be connected via a hub or router by a LAN.

  The content transmitting apparatus 100 converts the format and transmits the content recorded on the optical disc mounted on the optical disc drive 101 in order to reproduce the content via the network.

  If the content to be transmitted is content whose copyright is to be protected, DTCP-IP (Digital Transmission Content Protection over Internet Protocol) is used in order to prevent unauthorized copying and tampering on the network.

  FIG. 2 is a block diagram illustrating the overall configuration of the content transmission device 1 and the content reception device 2 according to the present invention.

  The content transmission device 1 includes one or a plurality of replaceable recording media 3 such as a DVD and a BD, and includes a content reading unit 201, a reproduction information generation unit 202, a content transmission unit 203, an authentication unit 204, a key generation unit 205, An encryption unit 206 and a network communication processing unit 208 are provided. The content reading unit 201 corresponds to the optical disc drive 101, and information read from the recording medium 3 is sent to the reproduction information generation unit 202 and the content transmission unit 203. The authentication unit 204 is connected to the reproduction information generation unit 202, the key generation unit 205, and the network communication processing unit 208. The encryption unit 206 is connected to the content transmission unit 203, the key generation unit 205, and the network signal processing unit 208.

The content receiving device 2 includes a network communication processing unit 209, authentication 210, key generation 211, decryption 212, reproduction information management unit 213, content reception unit 214, and content reproduction unit 215. The network communication processing unit 209 is connected to the content transmission device 1 via a LAN. The authentication unit 210 is connected to the key generation unit 211. The key generation unit 211 receives an instruction from the authentication unit 210 and instructs the decryption unit 212. The content reception unit 214 receives data from the decryption unit 212 and outputs the data to the content reproduction unit 215.

  The recording medium 3 assumes contents such as video and audio such as a DVD (Digital Versatile Disc) and a BD (Blu-ray Disc). The DVD and BD record not only video / audio data but also information for reproduction control that can accept a remote control operation from the user and change the reproduction mode. For example, it has functions such as jumping chapters and playing them back from where they want to see. This allows the user to see only the scene he wants to see. In addition, switching of voice language can be set through a menu screen created by the content creator. DVD and BD provide the user with functions such as playback from a designated position and switching operation modes as described above, and also have the function of restricting the user's operations by the content producer. This is because, for example, when displaying a note of content at the beginning of the content, special playback such as skipping or fast-forwarding the scene cannot be performed so that the user does not overlook important information due to erroneous operation. , Can be surely alerted. The recording medium 3 includes various media such as an SD card and a hard disk in addition to DVD and BD. The recording medium 3 may be video / audio content, video-only content, or audio-only content, and the content creator's intention is reflected in preference to user operations. Any playback format can be used.

  The content reading unit 201 is a part for reading the content recorded on the recording medium 3 and reads the video / audio data recorded on the recording medium and the management information of the video / audio data. When the video / audio data is content to be copyright-protected and is encrypted data such as AACS, CPRM, CSS, etc., the content reading unit 201 reads the content while decrypting it. The management information includes information for specifying the type of video / audio data and information related to the scene and title of the video / audio data. Thereby, even video / audio data recorded continuously can be reproduced from a designated position. Therefore, the user can save the trouble of searching for a scene to be reproduced from the beginning, and can easily jump to the desired scene and reproduce it.

  The reproduction information generation unit 202 converts the management information read from the content reading unit 201 into a format designated in advance by the authentication unit 204 described later. In this embodiment, the authentication unit 204 performs format conversion so as to comply with the DTCP-IP (Digital Transmission Content Protection over Internet Protocol) standard. When content transmission / reception is performed using DTCP-IP, data transmission / reception can be performed while preventing unauthorized copying. Therefore, the content recorded on the recording medium 3 can be transmitted to another terminal without being illegally copied, and the rights of the copyright holder of the content recorded on the recording medium 3 can be protected. Here, as described above, the management information includes information on the scenes and titles of the video / audio data as the content list information, and these pieces of information are converted into another format. Specific description will be described later.

  The content transmission unit 203 transmits the reproduction information transmitted from the reproduction information generation unit 202 and the video / audio data of the content acquired from the content reading unit 201 in a configuration conforming to the DTCP-IP standard.

  The authentication unit 204 executes an authentication process to determine whether the content receiving device 2 is an unauthorized device. The content receiver 2 corresponds to the authentication unit 210. Key information is necessary for authentication, and the authentication unit 204 acquires from the key generation unit 205 and the authentication unit 210 acquires from the key generation unit 211, respectively.

  The key generation unit 205 generates key information necessary for content encryption.

  The key generation unit 211 generates key information necessary for content decryption.

  The encryption unit 206 performs content encryption processing using the key information of the key generation unit 205.

  The decryption unit 212 performs content decryption processing using the key information of the key generation unit 211.

  The network communication processing unit 208 exchanges authentication data with the authentication unit 204 and receives encrypted content from the encryption unit 206, and communicates with the content reception device 2 via a network such as a LAN. The content reception device 2 communicates with the content transmission device 1 via the network communication processing unit 209. After the content transmitted from the content transmission apparatus 1 is received by the network communication processing unit 209, the encrypted content is transmitted to the decryption unit 212.

When content recorded according to the DVD or BD standard is transmitted according to the DTCP-IP standard, content reproduction information is transmitted via the network communication processing units 208 and 209. The content list information is transmitted after communication is established by the network communication processing units 208 and 209. For example, the content list information is transmitted at a timing such as when the power is turned on, when the mode is changed to the network reproduction mode, or when the user performs a content list display operation. In addition, when the content list information is changed, the content list information is transmitted whenever it is changed, or the updated content list information is transmitted when the user performs a content list display operation next time.

  The decryption unit 212 performs authentication with the content transmission apparatus 1 in advance, and an appropriate key is generated by the key generation unit 211. Using this key information, the decryption unit 212 decrypts the content.

  The content reception unit 214 extracts reproduction information superimposed from the content received from the decryption unit 212 and transmits the reproduction information to the reproduction information management unit 213. The content itself is sent to the content reproduction unit 215.

  The reproduction information management unit 213 receives the reproduction information generated by the reproduction information generation unit 202 of the content transmission apparatus 1 from the content reception unit 214 and reproduces data based on the reproduction information in cooperation with the content reproduction unit 215 described later. The specific operation is described later.

  The content reproduction unit 215 performs reproduction control of the content received by the content reception unit 214. The configuration of the content playback unit 215 is shown in FIG. In the content playback unit 215, a CPU 402, a memory 403, a video / audio extension control unit 404, an output I / F 405, an input I / F 406, and a playback control unit 407 are connected to each other via a bus 401.

  The memory 403 is an area for temporarily storing content data from the content receiving unit 214.

  The video / audio expansion control unit 404 expands the content data stored in the memory 403 together with the video / audio and outputs it to the output I / F 405. The content data format of DVD and BD is encoded by MPEG (Moving Picture Experts Group) method and H.264 method for video, and the audio is developed by AAC (Advanced Audio Coding) and Dolby Digital (Dolby Laboratories, Inc) Audio digital encoding) format. These video and audio data are multiplexed by TS (Transport Stream). The video / audio expansion control unit 404 separates the content data in such a format into video and audio and expands them respectively. Note that the present invention does not depend on these formats, and any format may be used as long as it is defined by a format recorded on a recording medium such as a DVD or a BD.

  The output I / F 405 is an IF that outputs video, audio, and the like. In this embodiment, the display 450 is connected, and the user can view the content displayed on the display 450. The type of output I / F 405 is DisplayPort designed for digital display devices such as HDMI (High-Definition Multimedia Interface) and liquid crystal displays that can connect video and audio with a single cable and transmit high-quality digital data. However, the present invention is not limited to this. Other I / Fs include a D terminal for transmitting video, a component terminal, a DVI (Digital Visual Interface) terminal, and the like, and an S / PDIF (Sony Philips Digital Interface) for transmitting audio. Also, the video / audio signal may be superimposed on another IF. For example, video / audio data may be transmitted via the TCP / IP protocol via an Ethernet (registered trademark) IF or a wireless LAN.

  The input I / F 406 receives a request from the user. There are a remote controller 451 for receiving a command command by infrared rays and a button 452 provided in the content receiving apparatus 2. The remote controller 451 and the button 452 can be used to perform operations such as content playback, skip, and pause. In addition, it is provided with up / down / left / right and a determination button so that it can be instructed by operating the menu displayed on the display 450 while confirming the display 450.

  Here, an example when reproduction information is added will be described. In FIG. 5, the entire content playback time axis is shown on the horizontal axis. An example is shown in which a content producer sets a skip-prohibited section (a section from TC1 to TC2) as a playback restriction section in a part of the content. The content transmission device reads the reproduction information from the recording medium 3, notifies the content transmission unit 203 that reading from TC 1 to TC 2 is prohibited, and transmits it to the content reception device 2. The content receiving apparatus 2 receives the reproduction information by the content reception unit 214 and holds the reproduction information by the reproduction information management unit 213. Here, when the playback time is T1, when the user executes a fast-forward instruction from the remote controller 451, the content playback unit 215 inquires the playback information management unit 213 and determines whether the user's operation can be accepted. Since the content producer prohibits skipping at the playback time T1, the content playback unit 215 continues playback without accepting an operation from the user. At this time, an icon or a message may be displayed on the display 450 to the effect that playback is restricted. By displaying the message, the user can know whether the instruction from the remote controller 451 is not properly transmitted to the content receiving device 2 or the playback restricted section, and no confusion occurs.

  Thus, the content recorded on the recording medium 3 is transmitted simultaneously with the content in a format that can be interpreted by the content receiving device when the content is transmitted. It can be played back as intended by the producer.

  Next, an example will be described in which when there is a restriction on the reproduction information, the user's operation is minimized while keeping the restriction.

  Since the configuration is the same as in the first embodiment, a description thereof will be omitted.

  FIG. 6 shows the entire playback time axis of the content on the horizontal axis. The upper row shows the overall picture of the recorded content, and the lower row shows the actual playback order in terms of horizontal axis time. The recorded content is composed of three titles, and a playback restriction section (prohibited skipping) is set only for the top title. At this time, an example in which the user reproduces from the position of T3 is shown. The flowchart in FIG. 7 is a processing flow of the receiving device 2 when the user tries to view the video from the middle (position T3 in FIG. 6). First, the content receiving device 2 receives a special reproduction request from the user (S701). Next, the receiving apparatus determines whether or not the special reproduction operation can be performed at the current reproduction position and the requested position (S702). Whether or not it is possible to seek to the position of T3 is described in the reproduction information. The reproduction information is generated by the reproduction information generation unit 202, and is transmitted from the content transmission device 1 to the content reception device 2 at any timing during the reproduction of the content at the time of disc recognition, immediately after activation, after successful authentication of the reception device and the transmission device. The FIG. 8 shows an example of the contents recorded. The content is composed of three titles, and the content of title number 1 is always reproduced and skipping is prohibited. Therefore, when the user tries to reproduce from the position of T3, that is, from the middle of the title number 3, the content transmitting apparatus 1 does not use the reproduction position specified by the user but the content receiving apparatus 2 transfers the data in the section where reproduction is restricted. (S704). When the reproduction of the reproduction restriction section is completed, the content receiving device 2 instructs the content transmitting device 1 to transfer data from the position requested by the user first (S705). In addition, when special playback is performed after the user finishes playback of the playback restriction section, the content reception device 2 instructs the content transmission device 1 to transfer from the user-specified position (S703). Thereby, even if there is a playback restriction section, the user can realize a skip operation with a minimum number of steps without performing a special operation. An error screen can be displayed when the user request is a playback restriction section. However, if the user request is processed as an error during the playback restriction section, the user cannot operate until the playback restriction section ends, which is inconvenient. is there. As in the present invention, after the reproduction restriction is reproduced, an operation designated by the user is automatically executed, so that the user's effort can be minimized while reproducing the content as intended.

  In this embodiment, an example will be described in which the content transmission apparatus manages all reproduction control information and simplifies the configuration of the content reception apparatus.

  FIG. 3 shows the overall configuration of this embodiment. The content transmission device 4 includes a built-in recording medium 6, and includes a content reading unit 301, a reproduction information generation unit 302, a reproduction control unit 303, a content transmission unit 304, an authentication unit 305, a key generation unit 306, an encryption unit 307, and network communication. A processing unit 308 is provided. The content reading unit 301 is connected to the recording medium 6, and the read information is sent to the reproduction information generation unit 302 and the reproduction control unit 303. When the video / audio data is content to be copyright-protected and is encrypted data such as AACS, CPRM, CSS, etc., the content reading unit 301 reads the content while decrypting it. The reproduction control unit 303 receives an instruction from the content receiving device 5 to be described later, performs reproduction and special reproduction execution control, and transfers the content transmission unit 304 video / audio data and management data. As an example of management data, it has information such as content name, format, date and time in a format defined by DLNA. The content list information, which is the list information, is transmitted after the communication is established by the network communication processing units 308 and 309 (post-operation). For example, the content list information is transmitted at a timing such as when the power is turned on or when the mode is changed to the network reproduction mode or when the user performs a content list display operation. In addition, when the content list information is changed, the content list information is transmitted whenever it is changed, or the updated content list information is transmitted when the user performs a content list display operation next time.

  The authentication unit 305 is connected to the reproduction information generation unit 302, the key generation unit 306, and the network communication processing unit 308. The encryption unit 307 is connected to the content transmission unit 304, the key generation unit 306, and the network signal processing unit 308.

  The content receiving device 5 includes a network communication processing unit 309, an authentication unit 310, a key generation unit 311, a decryption unit 312, a special playback control unit 313, a content reception unit 314, and a content playback unit 315. The network communication processing unit 309 is connected to the content device 4 via a LAN. The authentication unit 310 is connected to the key generation unit 311. The key generation unit 311 receives an instruction from the authentication unit 310 and instructs the decryption unit 312. The content reception unit 314 receives data from the decryption unit 312 and outputs the data to the content reproduction unit 315.

  The content reading unit 301, the reproduction information generation unit 302, the authentication units 305 and 310, the key generation units 306 and 311, the encryption unit 307, the network communication processing units 308 and 309, the decryption unit 312, and the content reception unit 314 Detailed description will be omitted.

  The reproduction control unit 303 stores the reproduction information acquired from the reproduction information generation unit 302. As described in the first embodiment, the reproduction information includes information such as a section in which the skip operation is prohibited.

  When the content receiving device 5 receives a special reproduction request from the user, the special reproduction control unit 313 issues a special reproduction request to the content transmission device 4 via the network communication unit 309. The special playback request includes the playback position information of the content, and includes, for example, a title number, a scene number, an elapsed time from the scene head (time designation jump), or the number of bytes from the scene head (byte designation jump). This reproduction position information is sent to the reproduction control unit 303 via the network communication processing 308 of the content transmission device 4. The reproduction control unit 303 determines whether or not the requested section can be reproduced from the reproduction information acquired from the reproduction information generation unit 302. If reproduction is possible, the content is read from the content reading unit 301 from the corresponding position and encrypted. The content is transmitted to the content receiving device 5 via the unit 307 and the network communication processing unit 308.

Here, a case where the special reproduction request position is the reproduction prohibited section will be described. When the content receiving device 5 receives a special reproduction request from the user, the special reproduction control unit 313 issues a special reproduction request to the content transmission device 4 via the network communication unit 309. The contents of the special reproduction request are as described above. This reproduction position information is sent to the reproduction control unit 303 via the network communication processing 308 of the content transmission device 4. The reproduction control unit 303 determines whether the requested section is reproducible from the reproduction information acquired from the reproduction information generating unit 302. If the special reproduction request position is a reproduction prohibited section, the content reading unit 301 Transmits the content without changing the reading position. The content transmission unit 304 superimposes the error information and transmits it to the content receiving device 5. The content receiving device 5 receives the error information at the content receiving unit 314 and notifies the content reproducing unit 315 of the error information. The error information may indicate that it is a reproduction-prohibited section, or if there is a problem with communication with the content transmission device 4, the failure information of the device can also be transmitted. Manage by code. When the content playback unit receives error information indicating that it is a playback prohibited section, the content playback unit notifies the user that the special playback is an error through a GUI of a screen display device (not shown). The error information transmission method is different from the method of writing in the TCP I / IP header part by the content transmission unit 304, the method of writing in the HTTP header, or the transfer of content data between the network communication processing units 308 and 309. However, the present invention is not limited to this.

  As described above, the content receiving device 5 does not receive all the content of the reproduction information generated from the content recorded on the storage medium 6 of the content transmitting device 4, but the intention of the producer of the content recorded on the storage medium 6 Can be played as expected.

  In addition, the structure of this invention is not limited only to the above-mentioned embodiment, You may add a various change within the range which does not deviate from the summary of this invention. For example, a device in which a content transmitting device and a receiving device are integrated may be used. Also, when used in combination with a television equipped with a BD / DVD drive as a content transmission device and a mobile phone as a content reception device, the content stored on the television is transmitted to the mobile phone in advance if it is in the radio wave range of the mobile phone. This is an effective combination example of the present invention because it is unnecessary and can be immediately viewed when viewing the content.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. In addition, a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files for realizing each function can be stored in a recording device such as a memory, a hard disk, an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.

  Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

100: Content transmission apparatus 101: Optical disk drive 102: Built-in storage 103: Television 104: LAN (Local Area Network)

Claims (12)

A content transmission device having a local content playback device,
A content reading unit for reading content from the local content playback device;
A network control unit for connecting to the content receiving device and transferring information;
A reproduction information conversion unit that converts a reproduction control method for local content into a reproduction control method defined by a connection method with the content receiving device;
A content transmission unit that superimposes and transmits the reproduction information converted by the reproduction information conversion unit to the content;
A content transmitting apparatus having: The content transmission device according to claim 1,
A content transmission apparatus, wherein the content transmission unit stores the reproduction information in HTTP or TCP / IP header information. A content transmission device having a local content playback device,
A content reading unit for reading content from the local content playback device;
A network control unit for connecting to the content receiving device and transferring information;
A reproduction information conversion unit that converts a reproduction control method for local content into a reproduction control method defined by a connection method with the content receiving device;
A reproduction information transmission unit for transmitting reproduction information generated by the reproduction information conversion unit;
The content transmission apparatus, wherein the reproduction information transmission unit transmits the reproduction information at the time of transmitting a content list to the content receiving apparatus or before starting the content reproduction. The content transmission device according to claim 3,
Content in which the reproduction information transmitted by the reproduction information transmitting unit is a part of content list information owned by a content transmission device and notifies the content reception device that the reproduction information is added Transmitter device. The content transmission device according to claim 1, wherein:
Even though restriction information is added as the reproduction information transmitted by the reproduction information transmission unit, when an operation that is not permitted is instructed from the content reception device, the operation is performed after the restriction on the restriction information is released. A content transmission device that receives content and transmits content. A content receiver that receives content from a content transmitter capable of transmitting local content to another device,
A network control unit that connects to the content transmission device and transfers information;
A content playback unit for playing back content transmitted from the content transmission device;
A playback information management unit that receives playback information of the content from the content transmission device and controls playback of the content based on the playback information;
A content receiving apparatus that receives the reproduction information before reproducing the content and controls reproduction of the content according to the reproduction information. A content transmission method including a step of reproducing local content,
A content reading step of reading content from the local content playback device;
A communication step of connecting to a content receiving device and transferring information; and
A reproduction information conversion step for converting the reproduction control method of the local content into a reproduction control method defined by the connection method with the content receiving device;
A content transmission step of superimposing and transmitting the reproduction information converted by the reproduction information conversion unit to the content;
A content transmission method comprising: The content transmission method according to claim 7,
A content transmission method comprising a step of storing the reproduction information in HTTP or TCP / IP header information in a content transmission step. A content transmission method including a step of reproducing local content,
A content reading step of reading content from the local content playback device;
A communication step of connecting to a content receiving device and transferring information; and
A reproduction information conversion step for converting the reproduction control method of the local content into a reproduction control method defined by the connection method with the content receiving device;
A reproduction information transmission step of transmitting the reproduction information generated in the reproduction information conversion step to the content receiving device;
A content transmission method comprising: transmitting the reproduction information in advance to the content receiving device in the reproduction information transmitting step. The content transmission method according to claim 9,
In the reproduction information transmitting step, the reproduction information to be transmitted is a part of content list information owned by the content transmission device, and the content reception device is notified that the reproduction information is added. Content transmission method. The content transmission method according to any one of claims 7 to 9,
In the reproduction information transmission step, when an operation that is not permitted is instructed from the content receiving apparatus even though restriction information is added as the reproduction information to be transmitted, the restriction on the restriction information is released after the restriction is released. A content transmission method that accepts an operation and transmits content. A content receiving method for receiving content from a content transmitting device capable of transmitting local content to another device,
A content receiving step of connecting to a content transmitting device and transferring information;
A content reproduction step of reproducing the content transmitted from the content transmission device;
A reproduction information management step for receiving reproduction information of the content from the content transmission device and performing reproduction control of the content based on the reproduction information;
A content receiving method, wherein the playback information is received before playback of the content, and playback of the content is controlled according to the playback information.

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