JP2011109490A - Transmission device and transmission method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission device which provides a viewer with comfortable viewing even when a content requires high-speed image responsiveness and reduces the amount of transmission data of a predetermined content. <P>SOLUTION: The transmission device (wireless transmission device 4) includes: a data compression unit 4c which compresses content data at a predetermined compression ratio; a wireless transmission-reception unit 4d which transmits the content data compressed by the data compression unit 4c to a display device; and a control unit 4e which identifies a type of content and controls the data compression unit 4c so as to switch the compression ratio of the content data based on the identified type of content. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a transmission device and a transmission method, and more particularly to a transmission device and a transmission method for transmitting content data to a display device.

  Conventionally, a transmission device that transmits content data to a display device is known (see, for example, Patent Document 1).

  Patent Document 1 discloses a wireless communication device (transmission device) that transmits video data (content data) to a display device wirelessly. In Patent Document 1, it is determined whether the display resolution of the display device is HD (High Definition) or SD (Standard Definition), and when the display resolution of the display device is SD, HD video is displayed. When data is transmitted, the video data is converted from HD to SD and then transmitted to the display device by wireless communication. As a result, transmission of HD video data with a large amount of data to a display device that can display only SD prevents the HD video data from occupying the radio band. In the above-mentioned patent document 1, when transmitting by wireless communication, video data is compressed before being transmitted.

  However, as in the wireless communication device (transmission device) described in Patent Document 1, the amount of data of the video data is sufficiently small by simply converting the video data from HD (high resolution) to SD (standard resolution). However, in some cases, there is a disadvantage that the wireless band may be occupied by the video data. Here, in the said patent document 1, video data is compressed before transmission. Since the amount of transmission data is further reduced by compressing the video data, it is considered possible to suppress the radio band from being occupied by the transmission data.

JP 2005-286517 A

  However, in order to display the compressed video data (content data) on the display device, it is necessary to expand the transmitted video data on the reception side (display device side). Here, since it takes a long time to expand data with a high compression ratio, if the compression ratio is increased to reduce the data amount of transmission data, the time required for expansion increases. Therefore, the video of the display device is delayed, and as a result, the video responsiveness of the display device is lowered. When the video responsiveness is reduced in this way, for example, in the case of content that requires video responsiveness, there is a problem that the viewer cannot comfortably view the content. .

  The present invention has been made to solve the above-described problems, and one object of the present invention is to allow viewers to comfortably view even content that requires video responsiveness. Another object of the present invention is to provide a transmission apparatus and a transmission method that can be performed and that can reduce the amount of transmission data in the case of predetermined content.

Means for Solving the Problems and Effects of the Invention

  A transmission device according to a first aspect of the present invention includes a data compression unit that compresses content data at a predetermined compression rate, a transmission unit that transmits content data compressed by the data compression unit to a display device, and a content type. And a control unit that controls the data compression unit so as to switch the compression rate of the content data based on the determined type of content.

  In the transmission device according to the first aspect, as described above, the control unit that determines the type of content and controls the data compression unit to switch the compression rate of the content data based on the determined type of content. By providing, the compression rate of content data can be switched according to the type of content data. As a result, for example, when transmitting content of a type that requires responsiveness, it is possible to suppress a reduction in video responsiveness by lowering the compression rate, and other than content that requires responsiveness. By compressing the predetermined content at a high compression rate, the amount of transmission data transmitted to the display device by the transmission means can be reduced. As a result, even in the case of content that requires responsiveness, the viewer can comfortably view the content, and in the case of predetermined content that does not require responsiveness, the amount of transmitted data is reduced. can do.

  In the transmission device according to the first aspect described above, preferably, the control unit is the first content that is not required to have a high responsiveness in displaying a video reflected on the display device in response to a user operation. When the determination is made, the data compression unit is controlled so as to compress the content data of the first content at the first compression rate, and the response of the display of the video in which the content is reflected on the display device with respect to the user's operation. When it is determined that the second content is required to be high, the data compression unit is controlled to compress the content data of the second content at a second compression rate lower than the first compression rate. With this configuration, when a delay occurs in content that requires video responsiveness and a delay in the video of the display device such that the viewer's comfort is reduced when the video of the display device is delayed. However, content that does not require video responsiveness that does not reduce the comfort of the viewer is discriminated, and for content that requires video responsiveness, the compression rate is lowered by the second compression rate and the content data For content that is transmitted and does not require video responsiveness, the content data can be transmitted by increasing the compression rate by the first compression rate. As a result, content that does not require video responsiveness among the contents is compressed at a high compression rate to reduce the amount of transmission data transmitted to the display device by the transmission means. When transmitting the requested content, the compression rate can be lowered to ensure video responsiveness.

  In this case, preferably, the second content includes a game. With this configuration, when transmitting content that is required to have a high response to the display of video reflected on the display device in response to a user's operation, such as a game, the compression rate is reduced. Transmission to the display device can be performed. Thereby, when playing a game, the responsiveness of the image | video with respect to a user's operation is ensured, Therefore The user can view a game image | video comfortably. For content other than games, the amount of transmission data can be reduced by increasing the compression rate.

  In the configuration for discriminating between the first content and the second content, preferably, the storage unit further stores in advance data for discriminating the type of content included in the content data of the second content, and the control unit includes: It is configured to determine whether or not the content is the second content by comparing data for determining the type of content stored in advance in the storage unit with the content data. If comprised in this way, a control part will easily discriminate | determine whether the content of transmission object is a 2nd content using the data for discriminating the kind of content previously memorize | stored in the memory | storage part. be able to.

  In the configuration for discriminating between the first content and the second content, it is preferable that the control unit further includes an input unit that inputs a type of the content by a user operation, and the control unit performs content based on an operation result of the input unit. Is configured to determine whether the content is the second content. With this configuration, the user who knows the contents of the content inputs whether or not the content to be transmitted is the second content to the apparatus using the input means, so that the control unit displays the input result. Based on this, the compression rate can be switched.

  In the transmission apparatus according to the first aspect, preferably, the transmission unit is configured to transmit the content data compressed by the data compression unit to the display apparatus by wireless transmission. As described above, responsiveness is required by applying the configuration according to the first aspect to a transmission apparatus that transmits content data by wireless transmission using a transmission path in which a usable bandwidth is limited. In the case of content, by reducing the amount of transmission data at a low compression rate, the content can be comfortably viewed by the viewer, and high compression is required for content that does not require responsiveness. The amount of transmission data can be further reduced at a rate. Thereby, even when the transmission state of the wireless transmission is not good, the content data can be easily transmitted.

  The transmission apparatus according to the first aspect preferably further includes a resolution conversion unit that converts the resolution of the content data, and the control unit switches the compression rate of the content data by the data compression unit and the content data is converted by the resolution conversion unit. The data compression unit, the resolution conversion unit, and the transmission unit are controlled so as to transmit the content data that has been converted at the switched compression rate and the resolution converted to the display device by the transmission unit. It is configured. With this configuration, not only the data amount of the content data to be transmitted is reduced by the data compression unit, but also the data amount to be transmitted is further reduced by lowering the resolution of the content data by the resolution conversion unit in a predetermined case. be able to.

  In this case, preferably, the display device is configured to be able to display the content in one of a high resolution state in which video is displayed at a high resolution and a low resolution state in which video is displayed at a low resolution. The image processing apparatus further includes an acquisition unit that acquires display state information of either the high resolution state or the low resolution state of the device, and the control unit is configured to display the display device in the high resolution state based on the display state information of the display device acquired by the acquisition unit. And the resolution conversion unit is controlled so as to convert the resolution of the content data based on the determination result. With this configuration, when the content data has a high resolution and the display device is in a low resolution state, the resolution of the content data can be lowered by the resolution conversion unit. Thereby, the data amount transmitted according to the display state of a display apparatus can be made small.

  In the transmission apparatus according to the first aspect, the transmission apparatus including a data compression unit, a transmission unit, and a control unit is preferably incorporated in a content providing device that provides content data. With this configuration, unlike the case where the content providing device and the transmission device separate from the content providing device are connected by a cable or the like, the component of the content providing device and the component of the transmission device (data compression unit and transmission) And the like can be controlled by one control unit of the content providing device.

  The transmission method according to the second aspect of the present invention is switched between the step of determining the content type, and the step of compressing the content data by switching the compression rate of the content data based on the determination result of the content type. Transmitting content data compressed at a compression rate to a display device.

  In the transmission method according to the second aspect, as described above, the content data is determined by compressing the content data by switching the compression rate of the content data based on the determined content type and based on the determined content type. The compression rate of the content data can be switched according to the type of the content data. As a result, for example, when transmitting content of a type that requires responsiveness, it is possible to suppress a reduction in video responsiveness by lowering the compression rate, and other than content that requires responsiveness. By compressing the predetermined content at a high compression rate, the data amount of transmission data transmitted to the display device can be reduced. As a result, even in the case of content that requires responsiveness, the viewer can comfortably view the content, and in the case of predetermined content that does not require responsiveness, the amount of transmitted data is reduced. can do.

  In the transmission method according to the second aspect, preferably, the step of transmitting the content data compressed at the switched compression rate to the display device displays the content data compressed at the switched compression rate by wireless transmission. Transmitting to the device. In this way, responsiveness is required by applying the configuration according to the second aspect to a transmission method for transmitting content data by wireless transmission using a transmission line with a limited usable bandwidth. In the case of content, by reducing the amount of transmission data at a low compression rate, the content can be comfortably viewed by the viewer, and high compression is required for content that does not require responsiveness. The amount of transmission data can be further reduced at a rate. Thereby, even when the transmission state of the wireless transmission is not good, the content data can be easily transmitted.

1 is a conceptual diagram illustrating an overall configuration of a wireless transmission system using a wireless transmission device according to a first embodiment of the present invention. 1 is a block diagram showing an overall configuration of a wireless transmission system using a wireless transmission device according to a first embodiment of the present invention. It is a figure for demonstrating the display state of the display apparatus of the radio | wireless transmission apparatus by 1st Embodiment of this invention. 5 is a flowchart for explaining control of the wireless transmission device according to the first embodiment of the present invention; It is the conceptual diagram which showed the whole structure of the wireless transmission system using the wireless transmission apparatus (content provision apparatus) by 2nd Embodiment of this invention. It is a block diagram which shows the whole structure of the wireless transmission system using the wireless transmission apparatus (content provision apparatus) by 2nd Embodiment of this invention. It is a block diagram which shows the whole structure of the wireless transmission system using the wireless transmission apparatus by 3rd Embodiment of this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

(First embodiment)
First, with reference to FIGS. 1-3, the structure of the wireless transmission system 1 using the wireless transmission apparatus 4 by 1st Embodiment of this invention is demonstrated.

  As shown in FIG. 1, a wireless transmission system 1 includes a display device 2, a content providing device 3, and a wireless transmission device 4 that wirelessly transmits content data provided by the content providing device 3 to the display device 2. It has. The content providing device 3 and the wireless transmission device 4 are connected by an HDMI cable 5.

  The display device 2 is a device having a display function for displaying video and a wireless reception function, and includes televisions 21 and 22, a portable music player 23, and a mobile phone 24 in the first embodiment. The resolution of the video that can be displayed differs between these display devices 2. That is, even with the same television, there are a television 21 compatible with HD (high resolution) and a television 22 compatible with SD (standard resolution). In the first embodiment, an example will be described in which a television capable of switching between HD (high resolution) display and SD (standard resolution) display is used as the HD-compatible television 21. Specifically, as shown in FIG. 3, the television 21 can switch between a one-screen display state and a two-screen display state. In the display state, SD display is performed.

  In addition, the content providing device 3 can provide content data including video and audio to the wireless transmission device 4. The content providing device 3 includes a game machine 31 and a DVD player 32 in the first embodiment.

  The wireless transmission device 4 has a function of transmitting content data supplied from the content providing device 3 to the display device 2 by wireless communication. In the first embodiment, the wireless transmission device 4 is configured to convert the resolution of content data in a predetermined case and perform wireless transmission with the data compressed.

  Next, detailed structures of the display device 2, the content providing device 3, and the wireless transmission device 4 will be described with reference to FIG. In FIG. 2, the display device 2 has a configuration common to the televisions 21 and 22, the portable music player 23, and the mobile phone 24 that constitute the display device 2 shown in FIG. 1.

  2, the content providing device 3 includes a data providing unit 3a that provides content data, an HDMI transmitting unit 3b that transmits the content data to the wireless transmission device 4 via the HDMI cable 5, and a data providing unit. 3a and a control unit 3c for controlling the HDMI transmission unit 3b. The data providing unit 3a is a game playback unit 31a in the game machine 31, and a DVD playback unit 32a in the DVD player 32.

  The wireless transmission device 4 includes an HDMI receiving unit 4a that receives content data transmitted from the content providing device 3, a resolution conversion unit 4b that converts the resolution of the content data, a data compression unit 4c that compresses the content data, A wireless transmission / reception unit 4d that transmits content data compressed in the data compression unit 4c to the display device 2 by wireless communication, and a control unit that controls the HDMI reception unit 4a, the resolution conversion unit 4b, the data compression unit 4c, and the wireless transmission / reception unit 4d 4e. The wireless transmission / reception unit 4d and the control unit 4e are examples of the “transmission unit” and the “control unit” of the present invention, respectively.

  The resolution converter 4b can convert HD content data into SD. It is also possible to output HD content data as it is without converting it into SD. Regarding the control of the resolution conversion unit 4b, the control unit 4e determines whether the display device 2 supports HD display or SD display, and whether the display state of the display device 2 is HD display state or SD. Judge whether the display state. When the display device 2 supports SD display, and when the display device 2 supports HD display and the display state of the display device 2 is SD display state, HD content data The resolution conversion unit 4b is controlled so as to convert the signal to SD. Also, when the display device 2 supports HD display, and when the display device 2 supports HD display and the display state of the display device 2 is the HD display state, HD content data The resolution converter 4b is controlled so as to output the signal as it is without converting the resolution.

  The data compression unit 4c has a function of compressing content data in a predetermined compression format. Here, in the first embodiment, the data compression unit 4c can compress the content data by switching to either the low compression rate or the high compression rate depending on the situation. Regarding the control of the data compression unit 4c, the control unit 4e is required to have a high responsiveness in displaying a video in which the content provided from the content providing device 3 is reflected on the display device 2 in response to a user operation. In the case of content (game content in the first embodiment), the data compression unit 4c is controlled so as to compress game content data at a low compression rate. In addition, the control unit 4e is configured such that the content provided from the content providing device 3 is not required to have high video display responsiveness reflected on the display device 2 in response to the user's operation. In the case of non-game content, the data compression unit 4c is controlled so as to compress the content data at a high compression rate. The game content and the non-game content are examples of the “second content” and the “first content” in the present invention, respectively.

  Note that in movies, television broadcasts, etc., even if a delay in the video on the display device 2 occurs, the video on the display device 2 is only uniformly delayed overall, which affects the user's viewing comfort. There is no.

  In addition, the control unit 4e of the wireless transmission device 4 determines whether the content provided from the content providing device 3 is game content or non-game content, and performs data compression as described above based on the determination result. The unit 4c is controlled. As a specific determination method, data for determining the type of content is stored in the memory 4f in advance, and the data is compared with the content data provided from the content providing device 3, thereby Determine the type. The memory 4f is an example of the “storage unit” in the present invention.

  The data for determining the content type is information unique to the content data of the game content that needs to be determined, such as title information of the game content. For example, by storing title information such as action games and car racing games in the memory 4f, it is possible to determine the types of those game contents.

  The display device 2 has expanded a wireless transmission / reception unit 2a that receives content data wirelessly transmitted from the wireless transmission device 4, and an expansion unit 2b that expands content data compressed in the data compression unit 4c in a predetermined format. An HDMI transmitting unit 2c that transmits content data to the display unit 2e via the HDMI cable 6, an HDMI receiving unit 2d that receives the transmitted content data and outputs it to the display unit 2e, a wireless transmitting / receiving unit 2a, 2b, an HDMI transmission unit 2c, an HDMI reception unit 2d, and a control unit 2f for controlling the display unit 2e.

  The control unit 2f of the display device 2 can transmit data related to the resolution supported by the display device 2 to the wireless transmission device 4 via the wireless transmission / reception unit 2a. The control unit 2f can also transmit display state information indicating the display state (HD display state or SD display state) of the display device 2 to the wireless transmission device 4 via the wireless transmission / reception unit 2a. The control unit 4e of the wireless transmission device 4 is configured to control the resolution conversion unit 4b based on the data related to the resolution of the display device 2 acquired from the display device 2 and the display state information. The wireless transmission / reception unit 4d of the wireless transmission device 4 is an example of the “acquisition unit” in the present invention.

  Next, content data transmission control of the wireless transmission device 4 according to the first embodiment of the present invention will be described with reference to FIG.

  First, in step S1, the control unit 4e of the wireless transmission device 4 determines whether the resolution of the content provided from the content providing device 3 is HD or SD. When the resolution of the content provided from the content providing device 3 is HD, the process proceeds to step S2, and when the resolution of the content provided from the content providing device 3 is SD, the process proceeds to step S5.

  Further, in step S2, the control unit 4e determines that the display device 2 is based on the data related to the resolution supported by the display device 2 transmitted from the display device 2 by the wireless transmission / reception unit 2a and acquired by the wireless transmission / reception unit 4d. It is determined whether it is compatible with HD display or SD display. If the display device 2 supports HD display, the process proceeds to step S3. If the display device 2 supports SD display, the process proceeds to step S5.

  In step S3, the control unit 4e determines that the display state of the display unit 2e of the display device 2 is HD based on the display state information transmitted from the display device 2 by the wireless transmission / reception unit 2a and acquired by the wireless transmission / reception unit 4d. It is determined whether the display state or the SD display state. When the display state of the display device 2 is the HD display state, the process proceeds to step S4, and when the display state of the display device 2 is the SD display state, the process proceeds to step S5.

  In the above steps S1 to S3, the control unit 4e determines whether the resolution of the content data is transmitted in HD or SD. When the processing proceeds to step S4, the resolution of the content data provided from the content providing device 3 is HD, and is transmitted to the display device 2 by wireless communication as it is. If the process proceeds to step S5, the resolution of the content data provided from the content providing device 3 is HD, but the display device 2 supports only SD, so it is necessary to convert to SD, or This is a case where the display device 2 only supports SD, but the resolution of the content data provided from the content providing device 3 is originally SD, so that it is not necessary to convert the resolution.

  Further, when wirelessly transmitting in HD, in step S4, the control unit 4e determines whether or not the content provided from the content providing device 3 is game content. If the content provided from the content providing device 3 is a game content, in step S6, the control unit 4e compresses the content data at a low compression rate while keeping the resolution HD, and then wirelessly transmits and receives the content data. The data is transmitted to the display device 2 via the unit 4d. If the content provided from the content providing device 3 is not a game content (non-game content), in step S7, the control unit 4e compresses the content data at a high compression rate while keeping the resolution HD. After that, the content data is transmitted to the display device 2 via the wireless transmission / reception unit 4d.

  When wirelessly transmitting via SD, in step S5, the control unit 4e determines whether or not the content provided from the content providing device 3 is game content. When the content provided from the content providing device 3 is a game content, in step S8, the control unit 4e converts the resolution from HD (high resolution) to SD (standard resolution), and at a low compression rate. After the content data is compressed, the content data is transmitted to the display device 2 via the wireless transmission / reception unit 4d. If the content provided from the content providing device 3 is not a game content (non-game content), in step S9, the control unit 4e converts the resolution from HD to SD and has a high compression rate. After the content data is compressed, the content data is transmitted to the display device 2 via the wireless transmission / reception unit 4d. In steps S8 and S9, if the content data is originally SD, resolution conversion is not performed.

  In the first embodiment, as described above, the control unit 4e that determines the type of content and controls the data compression unit 4c to switch the compression rate of the content data based on the determined type of content is provided. Thus, the compression rate of the content data can be switched according to the type of content data. As a result, for example, when transmitting content of a type that requires responsiveness, it is possible to suppress a reduction in video responsiveness by lowering the compression rate, and other than content that requires responsiveness. By compressing the predetermined content at a high compression rate, the amount of transmission data transmitted to the display device 2 by the wireless transmission / reception unit 4d can be reduced. As a result, even in the case of content that requires responsiveness, the viewer can comfortably view the content, and in the case of predetermined content that does not require responsiveness, the amount of transmitted data is reduced. can do.

  In the first embodiment, as described above, when it is determined that the content is non-game content, the data compression unit 4c is controlled so as to compress the content data of the non-game content at a high compression rate. Is determined to be game content, the data compression unit 4c is controlled so as to compress the content data of the game content at a low compression rate. With such a configuration, the game content that requires video responsiveness and the video of the display device 2 are delayed so that the comfort of the viewer is reduced when the video of the display device 2 is delayed. Discriminating from non-game content that does not require video responsiveness so that the viewer's comfort will not be reduced even if an error occurs, and the content data is transmitted at a low compression rate for game content. Content data can be transmitted at a high compression rate. As a result, the non-game content of the content is compressed at a high compression rate, thereby reducing the data amount of the transmission data wirelessly transmitted to the display device 2, and when the game content of the content is transmitted, the compression is performed. The response rate of the video can be ensured by reducing the rate.

  In the first embodiment, as described above, when it is determined that the content is not a game, the data compression unit 4c is controlled to compress the content data of the content at a high compression rate, and the content is a game. If it is determined, the data compression unit 4c is controlled so as to compress the content data of the content at a low compression rate. With this configuration, when transmitting content that is required to have high responsiveness in displaying video reflected on the display device 2 in response to a user's operation, such as a game, the compression rate is low. Thus, transmission to the display device 2 can be performed. Thereby, when playing a game, the responsiveness of the image | video with respect to a user's operation is ensured, Therefore The user can view a game image | video comfortably. For content other than games, the amount of transmission data can be reduced by increasing the compression rate.

  In the first embodiment, as described above, the content is the game content (game) by comparing the data for determining the type of the content stored in advance in the memory 4f with the content data. It is determined whether or not. With this configuration, it is possible to easily control whether or not the content to be transmitted is game content (game) using data for determining the type of content stored in advance in the memory 4f. 4e can discriminate.

  In the first embodiment, as described above, the compression rate of the content data is switched by the data compression unit 4c, and the resolution of the content data is converted by the resolution conversion unit 4b. With this configuration, not only the data amount of the content data to be transmitted is reduced by the data compression unit 4c but also the resolution of the content data is lowered by the resolution conversion unit 4b in a predetermined case, thereby reducing the amount of data to be transmitted. It can be further reduced.

  In the first embodiment, as described above, the display device 2 is in the high resolution state or the low resolution state based on the display state information of either the high resolution state or the low resolution state of the display device 2. The resolution conversion unit 4b is controlled to convert the resolution of the content data based on the determination result. With this configuration, when the content data has a high resolution and the display device 2 is in a low resolution state, the resolution of the content data can be lowered by the resolution conversion unit 4b. Thereby, the data amount transmitted according to the display state of the display apparatus 2 can be made small.

(Second Embodiment)
Next, a radio transmission system 100 using the radio transmission apparatus according to the second embodiment of the present invention will be described with reference to FIG. 5 and FIG. In the second embodiment, unlike the first embodiment, an example in which a wireless transmission device (wireless transmission unit 101c) is incorporated in the content providing apparatus 101 will be described.

  As shown in FIGS. 5 and 6, the wireless transmission system 100 includes a display device 2 and a content providing device 101 having a wireless communication function. The content providing device 101 includes a data providing unit 101a that provides content data, an HDMI transmitting unit 101b that transmits the content data to the wireless transmission unit 101c via the HDMI cable 5, a data providing unit 101a, an HDMI transmitting unit 101b, And a control unit 101d that controls the wireless transmission unit 101c. That is, the content providing device 101 includes a wireless transmission unit 101c in addition to the data providing unit 101a and the HDMI transmission unit 101b, and the control unit 101d of the content providing device 101 includes the data providing unit 101a and the HDMI transmission unit 101b. The wireless transmission unit 101c is configured to control both. In addition, the content providing apparatus 101 includes a memory 101e that stores data for determining the type of content. The content providing device 101 is a game machine 111 and a DVD player 112 as in the first embodiment.

  Similarly to the first embodiment, the wireless transmission unit 101c includes an HDMI receiving unit 4a that receives content data transmitted from the data providing unit 101a, and a resolution conversion unit 4b that converts the resolution of the content data in a predetermined case. A data compression unit 4c that compresses the content data, and a wireless transmission / reception unit 4d that transmits the content data compressed by the data compression unit 4c to the display device 2 by wireless communication.

  The other configuration of the wireless transmission system 100 is the same as that of the wireless transmission system 1 of the first embodiment. Further, the control of the control unit 101d according to the second embodiment is the same as the control (see FIG. 4) of the control unit 4e of the first embodiment, and thus the description thereof is omitted.

  In the second embodiment, as described above, the wireless transmission device (wireless transmission unit 101c) including the resolution conversion unit 4b, the data compression unit 4c, and the wireless transmission / reception unit 4d is incorporated in the content providing apparatus 101. With this configuration, unlike the case where the content providing device 101 and a wireless transmission device separate from the content providing device 101 are connected by a cable or the like, the components of the content providing device 101 (data providing unit 101a and HDMI) The transmission unit 101b) and the components of the wireless transmission unit 101c (such as the HDMI reception unit 4a, the resolution conversion unit 4b, the data compression unit 4c, and the wireless transmission / reception unit 4d) are controlled by one control unit 101d of the content providing apparatus 101 be able to.

  Other effects of the second embodiment are the same as those of the first embodiment.

(Third embodiment)
Next, with reference to FIG. 7, a radio transmission system 200 using the radio transmission apparatus according to the third embodiment of the present invention will be described. In the third embodiment, unlike the first embodiment in which the type of content is determined by comparing the content data and the data stored in the memory 4f, the type of content is received based on the operation result by accepting a user operation. An example of discriminating is described.

  As illustrated in FIG. 7, the wireless transmission system 200 includes a display device 2, a content providing device 3, and a wireless transmission device 201 that wirelessly transmits content data provided by the content providing device 3 to the display device 2. It has. The content providing device 3 and the wireless transmission device 201 are connected by the HDMI cable 5.

  The wireless transmission device 201 includes a control unit 201a that controls the HDMI reception unit 4a, the resolution conversion unit 4b, the data compression unit 4c, and the wireless transmission / reception unit 4d. The control unit 201a of the wireless transmission device 201 determines whether the content provided from the content providing device 3 is game content or non-game content, and based on the determination result, the data compression unit 4c as described above. Controls to switch the compression ratio. As a specific determination method, the control unit 201a determines the content type based on the user's content type instruction. That is, the wireless transmission apparatus 201 is provided with an input unit 201b for accepting a user operation for the user to instruct the type of content. The input unit 201b includes, for example, a receiving unit that can receive a signal having operation information such as a switch and a remote control by a user. When the user instructs that the content provided from the content providing device 3 is game content using the input unit 201b, the control unit 201a determines that the content provided from the content providing device 3 is game content. .

  Since the configuration other than the above is the same as that of the first embodiment, a description thereof will be omitted. The control of the control unit 201a according to the third embodiment is the same as the control (see FIG. 4) of the control unit 4e of the first embodiment except for the content type determination method described above, and thus the description thereof is omitted. To do.

  In the third embodiment, as described above, the wireless transmission device 201 is provided with the input unit 201b for inputting the type of content by a user operation, and the content is game content based on the operation result of the input unit 201b. It is configured to determine whether or not. With this configuration, the control unit 201a allows the user who knows the content to input whether or not the content to be transmitted is game content to the wireless transmission device 201 using the input unit 201b. The compression rate can be switched based on the input result.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first to third embodiments, the transmission data (content data) is compressed by the data compression unit 4c, and the resolution of the content data is converted by the resolution conversion unit 4b in a predetermined case. The present invention is not limited to this, and only the compression of the content data is performed, and the resolution of the content data need not be converted.

  Moreover, although the example which transmits content data by radio | wireless communication was demonstrated in the said 1st-3rd embodiment, this invention is not restricted to this, You may transmit content data by wired communication. In this case, the display device does not need a wireless reception function.

  Moreover, although the said 1st-3rd embodiment demonstrated the example which switches a compression rate in two steps, a low compression rate and a high compression rate, this invention is not restricted to this, The kind of content is three or more types The compression rate may be switched in three or more stages.

  In the first to third embodiments, a game is given as an example of content that requires video responsiveness. However, content other than a game may be used.

  In the first to third embodiments, an example in which game content and non-game content are discriminated and the compression rate is reduced for the game content has been described. However, the present invention is not limited to this, and the game content is not limited thereto. Whether or not responsiveness is required may be determined based on this, and only a game that requires responsiveness may be compressed at a low compression rate. For example, among game contents, such as an action game, a car racing game, and the like, game content that has a high operation speed in a game image and that needs to be immediately reflected as an image on the display device 2 by a user operation on the game machine. It is good also considering the game content which has as content for which responsiveness is requested | required.

  In the first and second embodiments, the content type is determined by storing data for determining the content type in advance. In the third embodiment, the content is determined based on a user operation. Although the example which discriminate | determines the type was demonstrated, this invention is not limited to this. For example, the type of content may be determined based on the type of content providing device connected to the wireless transmission device. Specifically, if a game machine is connected to the wireless transmission device, the content is determined to be game content, and if a device other than the game machine is connected, it is determined to be non-game content. May be.

  In the first to third embodiments, the example in which the wireless transmission / reception unit 2a having the wireless transmission / reception function is provided in the display device 2 and the received content data is transmitted to the display unit 2e via the HDMI cable 6 has been described. However, the present invention is not limited to this, and a device having a wireless transmission / reception function may be provided separately from a display unit (display device) having a display function, and these devices may be connected by an HDMI cable.

  In the first to third embodiments, the televisions 21 and 22, the portable music player 23, and the mobile phone 24 are given as examples of the display device 2. However, the present invention is not limited to this and displays an image. Other devices having a display function and a wireless reception function may be used. For example, a PDA (not shown) or a personal computer (not shown) may be used.

  In the first to third embodiments, the game machine 31 and the DVD player 32 are given as examples of the content providing device 3. However, the present invention is not limited to this, and other devices that provide content may be used. For example, a BD player, a personal computer, an STB (Set-Top Box), or the like may be used. When these are the content providing devices 3, the data providing unit 3a is a BD playback unit in a BD player, and a hard disk, a DVD playback unit, an external network connection unit for downloading data, etc. in a personal computer. . In STB, it is a tuner section.

DESCRIPTION OF SYMBOLS 1 Wireless transmission system 2 Display apparatus 3 Content provision apparatus 4 Wireless transmission apparatus (transmission apparatus)
4b Resolution conversion unit 4c Data compression unit 4d Wireless transmission / reception unit (transmission means, acquisition means)
4e Control unit 4f Memory (storage unit)
100 Wireless transmission system 101 Content providing device (transmission device)
101d Control unit 101e Memory (storage means)
200 Wireless Transmission System 201 Wireless Transmission Device (Transmission Device)
201a Control unit 201b Input means

Claims (11)

A data compression unit that compresses content data at a predetermined compression rate;
Transmission means for transmitting content data compressed by the data compression unit to a display device;
And a control unit that controls the data compression unit so as to switch a compression rate of the content data based on the determined content type.   When the control unit determines that the content is the first content that is not required to have a high response to the display of the video reflected on the display device in response to a user operation, the control unit The data compression unit is controlled so as to compress the content data at the first compression rate, and the content is required to be highly responsive in displaying the video reflected on the display device in response to a user operation. 2. The data compression unit according to claim 1, wherein when the content is determined to be second content, the data compression unit is controlled to compress the content data of the second content at a second compression rate lower than the first compression rate. Transmission equipment.   The transmission apparatus according to claim 2, wherein the second content includes a game. A storage unit that stores in advance data for determining the type of the content included in the content data of the second content;
The control unit determines whether the content is the second content by comparing the content data with data for determining the type of the content stored in advance in the storage unit. The transmission apparatus according to claim 2, wherein the transmission apparatus is configured as described above. It further comprises an input means for inputting a content type by a user operation,
The transmission device according to claim 2 or 3, wherein the control unit is configured to determine whether the content is the second content based on an operation result of the input unit.   The transmission device according to claim 1, wherein the transmission unit is configured to transmit the content data compressed by the data compression unit to the display device by wireless transmission. A resolution converter for converting the resolution of the content data;
The control unit switches the compression rate of the content data by the data compression unit, converts the resolution of the content data by the resolution conversion unit, is compressed at the switched compression rate, and the resolution is converted The data compression unit, the resolution conversion unit, and the transmission unit are configured to control the data compression unit, the resolution conversion unit, and the transmission unit so that content data is transmitted to the display device by the transmission unit. The transmission device described. The display device is configured to be able to display the content in one of a high resolution state in which video is displayed with high resolution and a low resolution state in which video is displayed with low resolution.
An acquisition means for acquiring display state information of either the high resolution state or the low resolution state of the display device;
The control unit determines whether the display device is in the high resolution state or the low resolution state based on the display state information of the display device acquired by the acquisition unit, and based on the determination result The transmission apparatus according to claim 7, wherein the resolution conversion unit is controlled to convert the resolution of the content data.   The transmission device according to claim 1, wherein the transmission device including the data compression unit, the transmission unit, and the control unit is incorporated in a content providing device that provides the content data. Determining the type of content;
Compressing the content data by switching the compression rate of the content data based on the determination result of the content type;
Transmitting the content data compressed at the switched compression rate to a display device.   The step of transmitting the content data compressed at the switched compression rate to the display device includes a step of transmitting the content data compressed at the switched compression rate to the display device by wireless transmission. Item 11. The transmission method according to Item 10.

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