JP4274059B2 - Video display system and video display terminal - Google Patents

Description

The present invention relates to a video display system and a video display terminal , and more particularly to a video display system and a video display terminal including a video camera and a video display terminal connected via a network.

  Each time a video signal of a subject image obtained by imaging is recorded on a magnetic tape, which is a first recording medium, the captured video (initial image) at the start of recording is used as a search image that is a still image. A video camera having a library function of recording on a portable second recording medium (for example, a memory card) together with the recording start position information of the recording medium has been proposed by the present applicant (for example, see Patent Document 1).

  On the other hand, a video camera having a function of transmitting image data on the Internet and a recording / playback apparatus that can be operated from the external portable terminal via the Internet are conventionally known (for example, see Patent Documents 2 and 3). . That is, the conventional video camera described in Patent Document 2 includes a communication unit that connects the video camera to the Internet and a control unit that transmits moving image data on the Internet, and the moving image data is transmitted from the communication unit to the server via the Internet. In this case, the moving image is converted into distribution stream data, and an ID unique to the distribution stream data is transmitted to the video camera in accordance with an instruction from the video camera. Further, in response to the distribution request of the distribution stream data corresponding to the ID from the monitor to the server, the server transmits the requested distribution stream data to the monitor.

  Further, in Patent Document 3, when a mobile phone transmits an operation signal of a recording / playback device to the video operation server via the Internet, the video operation server receives the operation signal and converts it into a format according to the recording / playback device. There has been disclosed a system for remotely operating a recording / reproducing apparatus by wireless transmission to the recording / reproducing apparatus in accordance with an operation command from a mobile phone.

JP 2002-218366 A JP 2003-78901 A JP 2002-176610 A

  However, the conventional video camera described in Patent Document 1 is a so-called camera-integrated VTR provided with a recording / playback unit, and has a library function of video recorded on a magnetic tape. It remains in the video camera body, and a remote client cannot use the library function via the network.

  In addition, the conventional video camera described in Patent Document 2 can transmit a captured moving image to a receiver monitor that is a client via the Internet, and a server for converting the moving image into distribution stream data. Needs to be interposed between the video camera and the client, and it takes time and effort to install the equipment, and there is no mention of a specific method for transmitting library information.

  Furthermore, Patent Document 3 only describes that a recording / playback device (so-called video deck) is remotely operated by a mobile phone via the Internet and a video operation server, and has a function of distributing image data to clients. No mention is made of a video camera with a video library function.

The present invention has been made in view of the above, and an object thereof is to provide a video display system and video display terminals may enjoy viewing library information and videos.

In order to achieve the above object, a video display system of the present invention is a video display system including a video camera and a video display terminal connected via a network.
The video camera records a video signal of a moving image obtained by capturing a subject image on a first recording medium, and records the video signal every time recording is started on the first recording medium. Library information including at least a search image at the start, recording start position information of the search image on the first recording medium, and a first medium identification number assigned to the first recording medium is generated. A second recording unit for recording the generated library information on a portable second recording medium, a communication unit having a server function for communicating with the video display terminal via a network, and a video display terminal. When the library information distribution request is received via the communication means, the library information recorded on the second recording medium is reproduced, and a library information file capable of displaying a list of the reproduced library information is created. And a file creation and transmission means for transmitting to the video display terminal via the communication means that library information file,
The video display terminal receives an acquisition request transmitting means for transmitting a library information acquisition request to the video camera, and a library information file returned from the video camera in response to the library information acquisition request. Based on the library information file, the search image, the first medium identification number, and the medium presence information indicating that the first recording medium corresponding to the first medium identification number is attached to the video camera, When the first display means for displaying the library information list including at least the library information on the display unit and the second medium identification number for identifying the first recording medium from the outside are designated, the designated second The comparison result of the comparison means for comparing whether the medium identification number and the first medium identification number included in the library information file match, and the comparison result of the comparison means match. If there is no match, the medium presence information indicating that the first recording medium corresponding to the first medium identification number is not attached to the video camera is displayed on the display unit. And 2 display means.

In order to achieve the above object, the video display system according to the present invention includes recording start position information corresponding to one search image arbitrarily selected from search images displayed on the library information list by the video display terminal. was extracted from the library information file, an image acquisition command that contains the extracted recording start position information further comprises an image acquisition command transmitting means for transmitting to the video camera, a video camera, the images acquisition command from the video display terminal When receiving via the communication means, the extraction means for extracting the recording start position information from the received image acquisition command and the recording position information recorded on the first recording medium to reproduce the recording position of the current position Current position information acquisition means for acquiring information, and the recording position information of the current position acquired by the current position information acquisition means match the recording start position information extracted by the extraction means A cue reproduction means for reproducing the recorded video signal of the first recording medium from the determined position, and a moving picture stream format of a format in which the recorded video signal of the first recording medium reproduced by the cue reproduction means can be transmitted over a network. It further has a moving image stream transmission means for converting and transmitting to the video display terminal via the communication means .

In order to achieve the above object, the video display terminal according to the present invention is a video image obtained by capturing an image of a subject in the video display terminal connected to the video camera via a network. each for recording a signal on a recording medium is information which is generated by a video camera, and the image for retrieval at record start of the video signal, and a first medium identification number assigned to each recording medium by a video camera An acquisition request transmitting means for transmitting a library information file acquisition request, which is at least information included, to the video camera; a library information file returned from the video camera in response to the library information file acquisition request; Based on the received library information file, the search image, the first medium identification number, and the first medium identification number are associated with each other. Second medium for the recording medium to identify a first display means for displaying on the display unit at least including library information list and the medium specific information indicating that it is attached to the video camera, the recording medium from the outside to When the identification number is designated, the comparison means for comparing whether or not the designated second medium identification number matches the first medium identification number included in the library information file, and comparison between the comparison means If the results match, the medium presence information is displayed, and if they do not match, the medium no-information indicating that the recording medium corresponding to the first medium identification number is not attached to the video camera is displayed on the display unit. And second display means.

  According to the present invention, the recording information of the first recording medium loaded in the video camera is displayed in a list as library information to a client at a location different from the video camera, so that only one video camera is provided. Thus, library information browsing using a network can be realized without requiring another device.

  Further, according to the present invention, when one search image is arbitrarily selected from the search images of the library information displayed by the client, a moving image signal corresponding to the selected one search image is transmitted via the network. Thus, even if the client is in a remote place away from the video camera, a moving image corresponding to the selected search image can be viewed.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 shows a system configuration diagram of an example of an image distribution system to which an embodiment of a video camera according to the present invention is applied. In the figure, a video camera 100 according to an embodiment of the present invention is connected to a client 200 via a network 300 such as the Internet or a local area network (LAN). The client 200 includes a personal computer (hereinafter referred to as a personal computer) 201 provided with a WWW (world wide web) browser 202.

  The video camera 100 includes a library information recording / reproducing unit 101, a control unit 102, a tape recording / reproducing unit 103 that records and reproduces a video signal with respect to a tape 107 serving as a first recording medium, a reproduced video converting unit 104, and a subject image. In the same manner as the video camera described in Patent Document 1 previously disclosed by the applicant, the video library function is realized and the communication unit 107 is added. ing.

  First, the recording operation of the video camera 100 will be described. When an instruction to record a moving image is given from an operation unit (not shown), the control unit 102 that controls the entire video camera 100 sends a recording control signal to the tape recording / reproducing unit 103 based on the moving image recording instruction. Supply and control to the recording operation state.

  Thereby, in the camera unit 100, an image signal obtained by converting an imaging signal of an arbitrary subject image into a video signal of a moving image through various signal processing such as A / D conversion, gamma correction, and setup, Supplied to the tape recording / reproducing unit 103, where compression processing, shuffling processing, etc. are performed based on, for example, the DV standard, tracking information, subcode area information, audio recording format information, time code, date and time Various control data such as information is added to form a DV format signal, and after NRZI modulation, a tilted track is sequentially formed and recorded on the tape 106 using a known magnetic tape recording / reproducing mechanism such as a rotary head. Is done.

  Further, in the video camera 100 of the present embodiment, when a moving image recording instruction is given by the operation unit, the captured initial image (video at the start of recording) is used as a still image (thumbnail image) on a portable recording medium. It has a function of recording on a certain memory card, and also has a function of searching for a tape head using this still image (thumbnail image).

  That is, when a moving image recording instruction is given by the operation unit, the control unit 102 supplies a control signal for recording a still image to the reproduction video conversion unit 104. As a result, the playback video conversion unit 104 captures the video signal of the captured moving image generated by the camera unit 105, and then performs, for example, JPEG compression processing to generate a still image signal at the start of recording. The data is supplied to the recording / reproducing unit 101 and recorded as library information in a memory card (not shown) as a second recording medium together with various control data such as the image size of the still image and date / time information. The still image as library information recorded on the memory card is, for example, a thumbnail image (still image file) of approximately 160 horizontal pixels × 120 vertical pixels.

  Next, the operation during playback of the video camera 100 will be described. When a tape reproduction instruction is given by an operation unit (not shown), the control unit 102 supplies a reproduction control signal to the tape recording / reproducing unit 103. As a result, the tape recording / reproducing unit 103 reproduces the signal recorded on the inclined track of the tape 106 using a known magnetic tape recording / reproducing mechanism, and then performs demodulation processing, expansion processing, deshuffling processing, etc. Get a signal.

  The tape recording / reproducing unit 103 outputs control data in the signal reproduced from the inclined track of the tape 106 to the control unit 102. The control unit 102 supplies the time code and date / time information in the input control data to the tape recording / reproducing unit 103 as display information and superimposes it on the reproduced video signal. The reproduced video signal on which the display information is superimposed is output to an external monitor (not shown).

  Further, when an instruction to reproduce library information is given by an operation unit (not shown), the control unit 102 supplies a reproduction control signal to the library information recording / reproducing unit 101. As a result, the library information recording / reproducing unit 101 performs a known JPEG decompression process on the still image file, which is the library information reproduced from the memory card, to convert it into a still image signal, and externally outputs it via an output terminal (not shown). Output to a monitor (not shown).

  At this time, various control data such as the image size and date / time information of the still image are supplied from the library information recording / reproducing unit 101 to the control unit 102. Among the control data, date information and the like are superimposed on the still image signal in the library information recording / reproducing unit 101 and output as display information. The still image signal on which the display information is superimposed is displayed on the monitor screen as a thumbnail image for cueing and searching the video recorded on the tape 106. Therefore, the reproduction of the above memory card is usually performed when searching for a cue.

  Next, an operation for providing library information and moving image information to the client 200 by the video camera 100 according to the present embodiment will be described. First, the client 200 accesses the video camera 100 for acquiring library information via the network 300 in order to confirm the moving image information recorded on the tape 106 of the video camera 100.

  Here, the video camera 100 has a URI (Uniform Resource Identifier) for accessing the library information recording / reproducing unit 101. The “URI” here is address information for specifying content on the network 300 as shown in FIG. 3A includes a protocol name “http”, a server name on the network “www.netdvc.com”, and a directory and file storing information “album.cgi”. It consists of a name.

  The client 200 in FIG. 1 uses the WWW browser 202 incorporated in the personal computer 201 to access the library information recording / playback unit 101 of the video camera 100. Therefore, the client 200 issues a specific URI acquisition command to the HTTP Text (HyperText Transfer Protocol Deamon). ) Issue with protocol. The issued acquisition command is transmitted to the communication unit 107 of the video camera 100 via the network 300 as an Internet protocol packet. The communication unit 107 is an HTTPD server and analyzes the received HTTPD protocol command.

  If the communication unit 107 analyzes the received HTTPD protocol command and determines that it is an acquisition command for the library information recording / reproducing unit 101, the communication unit 107 notifies the control unit 102 of it. As a result, the control unit 102 causes the library information recording / reproducing unit 101 to reproduce the library information recorded on the memory card and acquire it.

  The control unit 102 sends the acquired library information to the communication unit 107. The communication unit 107 dynamically creates an HTML (HyperText Markup Language) document that displays library information based on the sent library information, and transmits it to the WWW browser 202 via the network 300. Based on the received HTML document, the WWW browser 202 displays a library information list in HTML on the screen of the personal computer 201 and presents it to the client 200.

  FIG. 2 shows an example of the above library information list display. In the figure, three thumbnail images 501, 502, and 503 recorded on the memory card are displayed aligned in the vertical direction, and on the right side of the thumbnail images 501, 502, and 503, respectively, The cue position is displayed, and the display positions are selected areas 504, 505, and 506 by clicking. In the library information list display, pull-down menus for page selection 507 and tape number selection 508 are also displayed.

  The client 200 browses the thumbnail images 501 to 503 displayed in the displayed library information list, and directly clicks a thumbnail image of a moving image to be viewed, or a video to be viewed in the selection areas 504 to 506 by clicking. Click the selection area displayed by clicking corresponding to the thumbnail image of the image. The selection areas 504 to 506 by clicking are links to the moving image stream starting from each cue position, and the URI includes a time code that can specify the cue position of the tape 106 as shown in FIG. The information “tc = F071” is included.

  When a desired thumbnail image or a selection area by clicking is clicked, the personal computer 201 issues a moving image stream acquisition command to the URI including the information for specifying the cue position by the HTTPD protocol. The issued command is transmitted as an Internet protocol packet to the communication unit 107 of the video camera 100 via the network 300. The communication unit 107 analyzes the received HTTPD protocol command.

  As a result of analyzing the received HTTPD protocol command, the communication unit 107 extracts a time code from the URI in the command when it is a video stream acquisition request, and controls the playback command from the obtained time code. The time code of the current position recorded on the tape 106 loaded in the tape recording / reproducing unit 103 is reproduced through the unit 102 to the tape recording / reproducing unit 103.

  The control unit 102 compares the current position indicated by the time code reproduced from the tape 106 loaded in the tape recording / reproducing unit 103 and the tape position to be searched based on the time code input from the communication unit 107, The tape recording / reproducing mechanism in the tape recording / reproducing unit 103 is controlled so that rewinding is performed if the tape position to be cueed is before the current position, and fast-forwarding is performed if it is after the current position. As a result, when the current position coincides with the cueing tape position, the tape recording / reproducing unit 103 starts reproduction of the video signal relating to the moving image recorded on the inclined track of the tape 106 from that position, and at the same time, starts reproduction. This is notified to the control unit 102.

  In response to the reproduction start notification, the control unit 102 issues a reproduction video conversion start command to the reproduction video conversion unit 104. The video signal reproduced from the inclined track of the tape 106 by the tape recording / reproducing unit 103 is supplied to the reproduced video converting unit 104, where it is converted into a video stream format that can be transmitted over the network. The converted video stream data is transferred to the communication unit 107 and further transmitted to the client 200 via the network 300.

  The personal computer 201 of the client 200 decodes and visualizes the received video stream data with a video stream playback application associated with the WWW browser 202. As a result, the client 200 can browse the moving image specified by the thumbnail image.

  Next, the library information display method will be described. As described above, the library information received from the video camera 100 via the network 300 is displayed by the WWW browser 202 of the personal computer 201 as shown in FIG. Since this library information display is basically a display for each tape number assigned to each tape 106, if you want to display library information for tapes with other tape numbers, the library information list display screen of FIG. By operating a pull-down menu of “tape number selection” 508, a desired tape number can be selected.

  On the other hand, the library information received by the client 200 includes the tape number of the tape 106 loaded in the video camera 100. As a result, the personal computer 201 compares the tape number selected by the client using the library information list display screen shown in FIG. 2 with the received tape number, and the tape number of the tape not loaded in the video camera 100. 2 is displayed, the tape non-display image indicated by 509 is displayed in FIG. 2, and when the tape number of the tape 106 inserted in the video camera 100 is selected, the tape display image indicated by 510 is displayed in FIG. indicate.

  When the tape non-display image 509 is displayed, since the tape is not loaded in the video camera 100 or a different tape is loaded, the client 200 browses the desired moving image signal selected by the thumbnail image. The desired moving image signal selected by the thumbnail image can be browsed only when the display image with tape 510 is displayed.

  In FIG. 2, the tape non-display image 509 and the tape display image 510 are graphically shown in FIG. 2, but are not limited thereto, and may be displayed in characters. Also, if not all thumbnail images of one tape can be displayed in one library information list display screen, a pull-down menu of “page selection” 507 in FIG. 2 is operated to input another page. You can browse other thumbnail images of the same tape.

  The present invention is not limited to the above embodiment. For example, the first recording medium on which the video camera 100 records and reproduces a moving image signal is the magnetic tape 106 in the above embodiment. Although described above, the present invention is not limited to this, and all recording media capable of recording and reproducing video signals, such as disk media and semiconductor memories, can be used. Further, the second recording medium recorded and reproduced by the library information recording / reproducing unit 101 can be applied to all portable recording media detachably attached to the video camera 100 such as an SD card or a multimedia card.

1 is a system configuration diagram of an example of an image distribution system to which an embodiment of a video camera of the present invention is applied. It is a figure which shows an example of the list display screen of library information. It is a figure explaining an example of URI which a video camera has, and URI which has selected library information.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Video camera of one Embodiment of this invention 101 Library information recording / reproducing part 102 Control part 103 Tape recording / reproducing part 104 Reproduction | regeneration video conversion part 105 Camera part 106 Tape 107 Communication part 200 Client 201 Personal computer (personal computer)
300 Network 501-503 Thumbnail image

Claims (3)

In a video display system comprising a video camera and a video display terminal connected via a network,
The video camera
First recording means for recording a video signal of a moving image obtained by capturing a subject image on a first recording medium;
Every time recording of the video signal into the first recording medium is started, a search image at the start of recording, recording start position information of the search image on the first recording medium, and the first recording medium A second recording means for generating library information including at least a first medium identification number assigned to the recording medium, and recording the generated library information on a portable second recording medium;
Communication means having a server function for communicating with the video display terminal via the network;
When the library information distribution request is received from the video display terminal via the communication means, the library information recorded on the second recording medium is reproduced, and the reproduction library information can be displayed as a list. Creating a library information file and sending the library information file to the video display terminal via the communication means; and
The video display terminal is
An acquisition request transmitting means for transmitting an acquisition request for the library information to the video camera;
The library information file returned from the video camera in response to the library information acquisition request is received, and based on the received library information file, the search image, the first medium identification number, First display means for displaying, on a display unit, a library information list including at least medium presence information indicating that the first recording medium corresponding to the first medium identification number is attached to a video camera; ,
When a second medium identification number for identifying the first recording medium is designated from the outside, the designated second medium identification number and the first medium identification included in the library information file A comparison means for comparing whether or not the number matches,
If the comparison result of the comparison means matches, the medium presence information is displayed. If the comparison results do not match, the first recording medium corresponding to the first medium identification number is not attached to the video camera. Second display means for displaying medium no-information indicating the above on the display unit;
A video display system comprising: The video display terminal is
The recording start position information corresponding to one search image arbitrarily selected from the search images displayed in the library information list is extracted from the library information file, and the image including the extracted recording start position information Image acquisition command transmission means for transmitting an acquisition command to the video camera;
The video camera
When the image acquisition command is received from the video display terminal via the communication unit, an extraction unit that extracts the recording start position information from the received image acquisition command;
Current position information acquisition means for reproducing the recording position information recorded on the first recording medium and acquiring the recording position information of the current position;
Cue reproduction for reproducing the recorded video signal of the first recording medium from the position where the recording position information of the current position acquired by the current position information acquisition means coincides with the recording start position information extracted by the extraction means Means,
A video stream that is converted by the first playback medium into a video stream format that can be transmitted over the network, and that is transmitted to the video display terminal via the communication unit. The video display system according to claim 1, further comprising: a transmission unit. In a video display terminal to be connected to a video camera via a network,
It said video camera is information generated by the video camera each time to be recorded on the recording medium a video signal of a moving image obtained by imaging the subject image, and the image for retrieval at record start of the video signal, An acquisition request transmitting means for transmitting a library information file acquisition request to the video camera, the information including at least a first medium identification number assigned to each recording medium by the video camera ;
The library information file returned from the video camera in response to the acquisition request for the library information file is received, and based on the received library information file, the search image and the first medium identification number And a first display means for displaying on the display section a library information list including at least medium presence information indicating that the recording medium corresponding to the first medium identification number is attached to a video camera;
When a second medium identification number for identifying the recording medium is designated from the outside, the designated second medium identification number and the first medium identification number included in the library information file are A comparison means for comparing whether or not they match,
When the comparison result of the comparison means matches, the medium presence information is displayed, and when they do not match, the medium indicating that the recording medium corresponding to the first medium identification number is not attached to the video camera Second display means for displaying no information on the display unit;
A video display terminal comprising:

Images