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Image sending device, image sending method, image receiving device, and image receiving method

A sending device and image receiving technology, which is applied in image communication, selective content distribution, television, etc., and can solve problems such as complicated image receiving side processing

Active Publication Date: 2016-08-17
MAXELL HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the technology described in Patent Document 1 has a problem that the processing on the video receiving side becomes complicated in order to simultaneously display videos received from a plurality of video transmitting devices.

Method used

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  • Image sending device, image sending method, image receiving device, and image receiving method
  • Image sending device, image sending method, image receiving device, and image receiving method
  • Image sending device, image sending method, image receiving device, and image receiving method

Examples

Experimental program
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Effect test

Embodiment 1

[0044] figure 1 This is an example of a form of a video transmission system including a camera as a video transmission device. exist figure 1Among them, 1 is a camera, and 2 to 3 are other cameras. 4 is a LAN (Local Area Network), 5 is a controller, and the cameras 1 to 3 are connected to the controller 5 via the LAN 4 . 6 is a display. In the network, as the protocol to be used, for example, the method stipulated in the IEEE802.3 standard as a data link protocol can be used, and the network protocol IP (Internet Protocol: Internet Protocol) can be used and the transmission on top of it can also be used. Layer protocols use TCP (Transmission Control Protocol: Transmission Control Protocol) and UDP (User Datagram Protocol: User Datagram Protocol). In the transmission of video and audio, higher-level application protocols such as RTP (Real-time Transport Protocol: Real-time Transport Protocol), HTTP (Hyper Text Transfer Protocol: Super Text Transfer Protocol), etc. are used....

Embodiment 2

[0082] Next, another example of an aspect of a video transmission system including a camera as a video transmission device will be described. Descriptions of the same parts as those in Embodiment 1 are omitted.

[0083] In Example 1, it is illustrated that Figure 13 , Figure 14 As shown, the reference signal 1 and the reference signal 2 of the camera include an example in which both periods and phases are synchronized. However, in practice, there are cases where the systems only match the period (or frequency) of the reference signal but not necessarily the phase. In this embodiment, assuming such a case, a case will be described where the phases of the reference signal 1 and the reference signal 2 do not match although the periods match.

[0084] In this embodiment, a structure for synchronizing time is provided between each camera and the controller. As a method for synchronizing time, for example, a method described in IEEE1588 can be used. Using such a method, the t...

Embodiment 3

[0095] Figure 16 A block diagram of Embodiment 3 of the present invention is shown. Hereinafter, Example 3 will be described using this figure.

[0096] In this embodiment, according to the H.264 / AVC (ISO / IEC14496-10) specification, video encoding is performed on video images of 1920×1080 pixels captured at 30 frames per second / sec, and the video images captured at a sampling rate of 48KHz The 12-bit audio data is subjected to MPEG1LayerII audio coding processing and packet multiplexing, and is sent via the network network camera. In the network, it is presupposed that the protocol to be used is, for example, a method specified in the IEEE802.3 specification as a data link protocol. In addition, in this embodiment, it is assumed that conventional PCM sampling is performed on speech, and encoding and transmission is carried out by MEPG1LayerII, and only the block structure is shown in the drawing.

[0097] exist Figure 16 The network transmission / reception unit 29 communi...

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PUM

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Abstract

A problem of the present invention is that, in order to simultaneously display the video received from a plurality of video transmission apparatuses, the processing on the video reception side becomes complicated. The video transmission device includes: a reference signal generating unit for generating a reference signal based on time information; an imaging unit for photographing the video signal based on the reference signal generated by the reference signal generating unit; and a compression unit for digitizing the video signal captured by the imaging unit compression coding; a network processing unit that receives time information and phase information of a reference signal for the time information from a network, and transmits a digitally compression-coded video signal; and a control unit that controls the reference signal generating unit and the network processing unit. Here, the control unit changes the phase of the reference signal generated by the reference signal generating unit based on the time information and the phase signal received by the network processing unit.

Description

technical field [0001] The invention relates to a device for transmitting images. Background technique [0002] Regarding the above-mentioned technical field, for example, Patent Document 1 discloses a transmission device having a function of adjusting display time when transmitting video via a network. [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 9-51515 Contents of the invention [0004] However, the technique described in Patent Document 1 has a problem in that processing on the video receiving side becomes complicated in order to simultaneously display videos received from a plurality of video transmitting devices. [0005] Therefore, in this specification, for example, the video transmission device controls the output delay time based on the control of the video reception device. [0006] One aspect of the present invention provides a video transmission device, characterized in that it comprises: a reference signal generation unit that gener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/2365H04N5/232H04N7/173H04N19/00H04N19/102H04N19/164H04N19/423H04N19/46H04N19/503H04N19/593H04N19/70H04N21/2187H04N21/235H04N21/238H04N21/242
CPCH04N21/2365H04N19/597
Inventor 沟添博树佐佐本学小味弘典冈田光弘
Owner MAXELL HLDG LTD