CN109803134A - A kind of video image transmission method and data frame structure based on HDMI system - Google Patents

A kind of video image transmission method and data frame structure based on HDMI system Download PDF

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CN109803134A
CN109803134A CN201810641401.3A CN201810641401A CN109803134A CN 109803134 A CN109803134 A CN 109803134A CN 201810641401 A CN201810641401 A CN 201810641401A CN 109803134 A CN109803134 A CN 109803134A
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image
data
subgraph
hdmi
transmission
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CN201810641401.3A
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王斌
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Ke Tong Huanyu (beijing) Technology Co Ltd
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Ke Tong Huanyu (beijing) Technology Co Ltd
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Abstract

The embodiment of the invention discloses a kind of video image transmission method and data frame structure based on HDMI system, the transmission of image is carried out using HDMI system, it simultaneously include texture maps and assistant images in data frame when transmission, assistant images are one or more images that View Synthesis is carried out with texture maps.In this way, the HDMI system in existing 2D image sends the image for 3D rendering synthesis, it is further used for the synthesis of coding and 3D video, there is good compatibility and scalability with existing video format and data system, conducive to the progress of 3D display industrialization.

Description

A kind of video image transmission method and data frame structure based on HDMI system
Technical field
The present invention relates to 3D field of video transmission more particularly to a kind of video image transmission method based on HDMI system and Data frame structure.
Background technique
With the development of 3D (Three Dimension, three-dimensional) display technology, naked eye 3D becomes becoming for display technology development Gesture and hot spot.Be utilized the principle of parallax of human eye in naked eye 3D display technology, user can not wearing spectacles, direct viewing screen And three-dimensional perception is obtained, the dependence to glasses is got rid of, brings better visual experience to user.
In naked eye 3D display technical system, first by original transmission of video images to encoder, encoder carries out video The coding of the code stream of image shows 3D rendering, original image sources after bit stream and decoding in 3D display equipment In the TV programme of shooting.
Currently, usually using HDMI (High Definition Multimedia Interface, high-definition multimedia Interface) system transmits original video image, and which can not be compatible with the biography of the 3D video image of current various formats Defeated, also without the special Transmission system for 3D video image, this affects the progress of 3D display industrialization.
Summary of the invention
The present invention provides a kind of video image transmission method and data frame structure based on HDMI system, utilization are existing HDMI system transmits 3D video image, compatible existing HDMI system.
The present invention provides a kind of video image transmission methods based on SDI system, comprising:
HDMI data frame is sent via transmission path using HDMI system, the image-region in the HDMI data frame is line The stitching image of reason figure and assistant images, the assistant images are to carry out the one or more of View Synthesis with the texture maps to scheme Picture.
Optionally, the connecting method of the stitching image is left and right splicing or splices up and down.
Optionally, the HDMI system sends HDMI data frame with 12bit transmission mode, includes shape in the assistant images Shape figure;Then, when sending HDMI data frame, the shape graph is sent with 4 bit of low level of the subgraph in stitching image.
Optionally, the parameter information of stitching image, the parameter of the subgraph in exclusive data packet are transmitted with exclusive data packet Sequence sort according to raster order.
Optionally, each subgraph parameter information includes: image type, affiliated viewpoint, layer belonging to Occlusion Map, whether has shape Shape data and the affiliated viewpoint of shape data.
A kind of HDMI data frame structure, the image-region in HDMI data frame are the spliced map of texture maps and assistant images Picture, the assistant images are one or more images that View Synthesis is carried out with the texture maps.
Optionally, the connecting method of the stitching image is left and right splicing or splices up and down.
It optionally, include shape graph, 4 bit of the low level in a subgraph of stitching image in the assistant images For the shape graph.
Optionally, further include exclusive data packet, be used for transmission the parameter information of each subgraph of stitching image, exclusive data packet In the sequence of parameter of subgraph sort according to raster order.
Optionally, the parameter of each subgraph includes: image type, affiliated viewpoint, layer belonging to Occlusion Map, whether has shape Data and the affiliated viewpoint of shape data.
Video image transmission method and data frame structure provided in an embodiment of the present invention based on HDMI system, using HDMI System carries out the transmission of image, simultaneously includes texture maps and assistant images in data frame when transmission, and assistant images are and texture Figure carries out one or more images of View Synthesis.In this way, the HDMI system in existing 2D image is sent for 3D rendering conjunction At image, be further used for the synthesis of coding and 3D video, have with existing video format and data system good simultaneous Capacitive and scalability, conducive to the progress of 3D display industrialization.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for For those of ordinary skill in the art, without any creative labor, it can also be obtained according to these attached drawings His attached drawing.
Fig. 1 is the basic format knot according to the transmission frame of HDMI system in the video image transmission method of the embodiment of the present invention Structure schematic diagram;
Fig. 2 is the structural schematic diagram according to stitching image in the video image transmission method of the embodiment of the present invention one;
Fig. 3 is the structural schematic diagram according to stitching image in the video image transmission method of the embodiment of the present invention two;
Fig. 4 is the structural schematic diagram according to stitching image in the video image transmission method of the embodiment of the present invention three.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall in the protection scope of this application.
The present invention provides a kind of video image transmission methods based on HDMI system, using HDMI system via transmission road Diameter sends HDMI data frame, and the effective image-region in the HDMI data frame is the stitching image of texture maps and assistant images, The assistant images are one or more images that View Synthesis is carried out with the texture maps.
It in embodiments of the present invention, is transmission based on HDMI system to original video image, HDMI system can be HDMI2.0 system etc..Original video image is sent from photographed data, and by HDMI data frame, original video counts It according to the image data that may include one or more viewpoint, such as can only include left viewpoint, right wing viewpoint, also may include Left and right wing two-way viewpoint, or more multichannel viewpoint, multichannel viewpoint are the one group of video datas taken a time point, The shooting angle of this group of video data is different.In the method, the image in HDMI data frame may include regarding all the way The texture maps and assistant images of point, also may include the texture maps and assistant images for being belonging respectively to multichannel viewpoint.
In embodiments of the present invention, the image data of a viewpoint includes texture maps and assistant images, texture maps, that is, 2D figure As data, assistant images are the data information that View Synthesis is carried out with the texture maps of respective viewpoints, and assistant images can be depth One of figure, shape graph, Occlusion Map etc. are a variety of, wherein before depth map is mainly used for showing between the image in texture maps Positional relationship afterwards, shape graph are mainly used for showing the profile information of the image in texture maps, and Occlusion Map is mainly used for showing texture The hiding relation between image in figure, depth map and/or shape graph, may include texture Occlusion Map, and/or depth occlusion figure. These assistant images are merely illustrative, in specific application, can also be other related datas as needed, texture maps and this A little assistant images are sent to encoder by HDMI system, after encoding and transmitting, decode in a decoder, decoded Texture maps and assistant images carry out View Synthesis, are shown with obtaining the video of 3D effect.
The transmission of HDMI system is the digital video signal of no compression, refering to what is shown in Fig. 1, for the data biography in HDMI system The structural schematic diagram of transmission of data frame, there are three types of the period is transmitted, respectively controls data period in the data transmission of HDMI (control period), data packet period (data island period) and video data period (video data Period), it is respectively used to transmitting control data, data packet (data island) and video data (video data), controls number Being used for transmission the data type in subsequent period according to the period is data packet or video data;The data packet period is used for transmission audio Data packet or packet (infoframe), packet belong to auxiliary data classification, are used for transmission the relevant parameter letter of video Breath;The video data period is used for transmission video data, that is, video image.Control data period and the data packet period be all What blanking zone carried out, blanking zone is located at the white space around image-region, and blanking zone includes horizontal blanking (horizontal Blanketing) and field blanking (vertical blanketing), in a specific example, image-region is 720 pixels X480 row, horizontal blanking are 138 pixels, and field blanking is 45 rows.
Data in data packet exist in the form of data packet, and the packet header (packet header) of data packet is by 24 digits It is constituted according to 8 bit checks, wherein first 8 of 24 data are type of data packet (packet type), with packet (infoframe) relevant type of data packet see the table below one.
Table one
Packet Type value Type
0x81 Exclusive data packet (Vendor-Specific InfoFrame)
0x82 AVI data packet (AVI InfoFrame)
0x83 Source product description data packet (Source Product Descriptor InfoFrame)
0x84 Packets of audio data (Audio InfoFrame)
0x85 MPEG source data packet (MPEG Source InfoFrame)
Be placed parameter information relevant to video in packet (infoframe), packet by 3 bytes packet header (packet header) and packet intension (packet content) composition that longest data are 27 bytes can be loaded, wherein The content of each byte see the table below two in packet header.
Table two
For different types of packet, the data format in packet intension is also different, exclusive data packet (Vendor- Specific InfoFrame) it can be used for defining the data format that 3D is transmitted.Specifically, Vendor-Specific The gauge outfit of InfoFrame see the table below three, wherein packet type 0x81, packet version be 0x01, packet length information according to The length of load is set.
Table three
The data format of the packet intension (packet content) of exclusive data packet see the table below four, and packet intension can have up to 27 bytes, packet byte PB0 are verification summation, and packet byte PB1-PB3 is the mark of specific (Vendor-specific) type of supplier Know symbol, specially 0xD85DC4;Packet byte PB4 is HF-VSIF (HDMI Forum Vendor Specific InfoFrame) Version, specially 1;The 1st (bit0) of packet byte PB5 indicates whether to transmit (3D_Valid) for 3D, if so, the position 1.The Gao Siwei (bit7-bit4) of packet byte PB6 indicates 3D structure, in the present invention, the structure of 3D transmission be left and right splicing or Splice up and down.Packet byte PB7 is when 3D_Valid is 1, and Gao Siwei is parameter 3D_F_Ext_Data relevant to 3D, Specially 1000-1111, for example, line by line transmit (line by line) when, by odd-numbered line indicate left-side images still by even number line Indicate left-side images etc..Gao Sanwei (bit1-bit5) in packet byte PB8 is the version of sub-image data, low 5 (bit4- It bit0 is) length of subgraph.Packet byte PB9-PB27 is the data content of subgraph parameter information.
Table four
In embodiments of the present invention, 3D transmission structure be left and right splicing or splice up and down, 3D transmission structure by High four of packet byte PB6 are arranged, and can define the structure of 1001 expression image mosaics as left and right splicing, 1010 indicates images Splicing construction be splice up and down.
Packet byte PB9-PB27 can be used for being arranged the data content of subgraph parameter information, subgraph parameter information packet Include: whether image type, affiliated viewpoint layer belonging to Occlusion Map, have shape data and the affiliated viewpoint of shape data.
Wherein, image type is denoted as image_type, can using 3 expressions, specifically, 000 indicates no image, 001 Indicate texture maps, 010 indicates that depth map, 011 indicate that shape graph, 100 indicate that texture Occlusion Map, 101 indicate depth occlusion figure.
Affiliated viewpoint indicates the id of the affiliated viewpoint of current subgraph, is denoted as View_id, can be using 3 expressions.
When layer indicates that present image is Occlusion Map where Occlusion Map, layer belonging to Occlusion Map is denoted as Layer_id.It can adopt It is indicated with 3, value range 0-8, current subgraph is set to 0 when being unshielding figure.
Whether shape data expression is had, and when transmitting with 12bit, whether low 4 have shape graph, is denoted as has_ Shape, wherein 1 indicates, 0 indicate without.
When the affiliated viewpoint of shape data indicates low 4 transmission shape graph, the viewpoint id that shape graph belongs to is denoted as shape_ view_id。
In this way, can indicate the above-mentioned parameter of subgraph using 2 byte packets for each width subgraph.Subgraph Corresponding sequence can sort according to raster order, be first left and then right sequence when left and right is spliced;When fourth officer image mosaic, it is Upper left, upper right, the sequence of lower-left, bottom right.Subgraph continuous parameters occur, and when extracting parameter, give according to raster order correspondence Each subgraph.
The video image transmission method based on HDMI system of the embodiment of the present invention is described in detail above, When specific transmission, according to the data format of original image and viewpoint number, specific connecting method and transmission mode can choose, Texture maps are included at least in original image, the assistant images of texture maps can be different images, and assistant images for example can be only Including depth map, it can also include depth map and shape graph, can also include depth map, shape graph and Occlusion Map, below by root According to the data format of different original images and the example of viewpoint number, the embodiment of transmission of video images is described in detail.
Embodiment one
In these embodiments, original video image is single viewpoint, including texture maps and depth map, with reference to Fig. 2 institute Show, image transmitting can be carried out using the mode of left and right splicing, the subgraph in the left side of image-region is texture maps, the son on right side Image is depth map.
So, the data content of the packet intension of exclusive data packet see the table below shown in five, the content of parameter be corresponding in turn in it is left, The supplemental characteristic of correspondence image in right subgraph.In the table, 3D_Valid is effective, packet byte PB6 in packet byte PB5 Middle 3D_F_Structure is that the structure of 1001 expression image mosaics is left and right splicing, is followed successively by left side in packet byte PB9-PB12 The data content of the subgraph parameter information of subgraph and right side subgraph, wherein packet byte PB9-PB10 is left side texture maps Supplemental characteristic, specifically, 7-5 of packet byte PB9 for image type image_type (001) indicate texture maps, 4-2 Position is that affiliated vision point iew_id (000) indicates viewpoint 0, and 7-5 of packet byte PB10 are layer Layer_id belonging to Occlusion Map (000) indicate unshielding figure, the 4th for whether have shape data has_shape (0) indicate amorphism data.Packet byte 7-5 of PB11 be image type image_type (010) indicate depth map, 4-2 be affiliated vision point iew_id (000) indicate viewpoint 0,7-5 of packet byte PB12 be the expression of layer Layer_id (000) belonging to Occlusion Map unshielding figure, 4th is whether to have shape data has_shape (0) to indicate amorphism data.
Table five
Embodiment two
In these embodiments, original video image is double vision point, includes texture maps, shape graph and depth per viewpoint all the way Degree figure can carry out image transmitting using the mode spliced up and down.Refering to what is shown in Fig. 3, the subgraph of upper left is viewpoint 0 Texture maps, and the shape graph of viewpoint 0 is contained in low 4;The subgraph of lower-left is the depth map of viewpoint 0.The subgraph of upper right For the texture maps of viewpoint 1, and 1 shape graph of viewpoint is contained in low 4;The subgraph of bottom right is 1 depth map of viewpoint.
So, the data content of the packet intension of exclusive data packet see the table below shown in six, and the content of parameter is corresponding in turn in a left side Upper, upper right, lower-left and the correspondence image in the subgraph of bottom right supplemental characteristic.In the table, 3D_Valid in packet byte PB5 It is to splice up and down that be effective, in packet byte PB6,3D_F_Structure, which is the structure of 1010 expression image mosaics, specifically , packet byte PB9-P10 is the data content of the subgraph parameter information of upper left, indicates that image is texture maps, affiliated viewpoint is Viewpoint 0, has shape data at unobstructed figure;Packet byte PB11-P12 is the data content of the subgraph parameter information of upper right, table Diagram picture is texture maps, affiliated viewpoint is viewpoint 1, unobstructed figure, has shape data;Packet byte PB13-P14 is the son of lower-left The data content of image parameter information indicates that image is depth map, affiliated viewpoint is viewpoint 0, unobstructed figure, does not have shape number According to;Packet byte PB15-P16 is the data content of the subgraph parameter information of bottom right, indicates that image is depth map, affiliated viewpoint is Viewpoint 1, does not have shape data at unobstructed figure.
Table six
Embodiment three
In these embodiments, original video image is single view, including texture maps, shape graph, depth map and texture Occlusion Map can carry out image transmitting using the mode spliced up and down.Refering to what is shown in Fig. 4, the subgraph of upper left is texture Figure, and shape graph is contained in low 4;The subgraph of upper right is depth map;The word image of lower-left is the 0th layer texture Occlusion Map, Bottom right is the 1st layer texture Occlusion Map.
So, the data content of the packet intension of exclusive data packet see the table below shown in seven, and the content of parameter is corresponding in turn in a left side Upper, upper right, lower-left and the correspondence image in the subgraph of bottom right supplemental characteristic.In the table, 3D_Valid in packet byte PB5 It is to splice up and down that be effective, in packet byte PB6,3D_F_Structure, which is the structure of 1010 expression image mosaics, specifically , packet byte PB9-P10 is the data content of the subgraph parameter information of upper left, indicates that image is texture maps, affiliated viewpoint is Viewpoint 0, has shape data at unobstructed figure;Packet byte PB11-P12 is the data content of the subgraph parameter information of upper right, table Diagram picture is depth map, affiliated viewpoint is viewpoint 0, unobstructed figure, does not have shape data;Packet byte PB13-P14 is lower-left The data content of subgraph parameter information indicates that image is texture Occlusion Map, affiliated viewpoint is viewpoint 0, is the 0th layer and blocks Figure does not have shape data;Packet byte PB15-P16 is the data content of the subgraph parameter information of bottom right, and expression image is line Reason Occlusion Map, affiliated viewpoint are viewpoint 0, are the 1st layer of Occlusion Maps, do not have shape data.
Table seven
It is recognised that in specific application, according to initial data and the difference of transmission mode, can there are more splicings to pass Defeated mode, above embodiments are merely illustrative, and the present invention is not limited thereto.
In addition, the present invention also provides a kind of HDMI data frame structure, refering to what is shown in Fig. 1, the image in HDMI data frame Region is the stitching image of texture maps and assistant images, and the assistant images are to carry out one of View Synthesis with the texture maps Or multiple images.
Further, the connecting method of the stitching image is left and right splicing or splices up and down.
It further, include shape graph in the assistant images, 4 of the low level in a subgraph of stitching image Bit is the shape graph.
Further, further include exclusive data packet, be used for transmission the parameter information of each subgraph of stitching image, exclusive data The sequence of the parameter of subgraph in packet sorts according to raster order.
Further, the parameter of each subgraph includes: image type, affiliated viewpoint, layer belonging to Occlusion Map, whether has shape Shape data and the affiliated viewpoint of shape data.
Video image transmission method and data frame structure provided in an embodiment of the present invention based on HDMI system, using HDMI System carries out the transmission of image, simultaneously includes texture maps and assistant images in data frame when transmission, and assistant images are and texture Figure carries out one or more images of View Synthesis.In this way, the HDMI system in existing 2D image is sent for 3D rendering conjunction At image, be further used for the synthesis of coding and 3D video, have with existing video format and data system good simultaneous Capacitive and scalability, conducive to the progress of 3D display industrialization.
Above description shows and describes several preferred embodiments of the present application, but as previously described, it should be understood that the application Be not limited to forms disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations, Modification and environment, and the above teachings or related fields of technology or knowledge can be passed through within that scope of the inventive concept describe herein It is modified.And changes and modifications made by those skilled in the art do not depart from spirit and scope, then it all should be in this Shen It please be in the protection scope of appended claims.

Claims (10)

1. a kind of video image transmission method based on HDMI system characterized by comprising
HDMI data frame is sent via transmission path using HDMI system, the image-region in the HDMI data frame is texture maps With the stitching image of assistant images, the assistant images are one or more images that View Synthesis is carried out with the texture maps.
2. transmission method according to claim 1, which is characterized in that the connecting method of the stitching image is left and right splicing Or splice up and down.
3. transmission method according to claim 1, which is characterized in that the HDMI system is with the transmission of 12bit transmission mode HDMI data frame includes shape graph in the assistant images;Then, when sending HDMI data frame, with the subgraph in stitching image 4 bit of low level of picture send the shape graph.
4. transmission method according to any one of claim 1-3, which is characterized in that transmit spliced map with exclusive data packet The sequence of the parameter information of picture, the parameter of the subgraph in exclusive data packet sorts according to raster order.
5. transmission method according to claim 4, which is characterized in that each subgraph parameter information includes: image type, institute Belong to layer belonging to viewpoint, Occlusion Map, whether have shape data and the affiliated viewpoint of shape data.
6. a kind of HDMI data frame structure, which is characterized in that the image-region in HDMI data frame is texture maps and assistant images Stitching image, the assistant images be with the texture maps carry out View Synthesis one or more images.
7. structure according to claim 6, which is characterized in that the connecting method of the stitching image be left and right splicing or on Lower left and right splicing.
8. structure according to claim 6, which is characterized in that it include shape graph in the assistant images, stitching image 4 bit of the low level in one subgraph are the shape graph.
9. structure a method according to any one of claims 6-8, which is characterized in that further include exclusive data packet, be used for transmission The sequence of the parameter information of each subgraph of stitching image, the parameter of the subgraph in exclusive data packet sorts according to raster order.
10. structure according to claim 9, which is characterized in that the parameter of each subgraph includes: image type, affiliated view Whether layer belonging to point, Occlusion Map has shape data and the affiliated viewpoint of shape data.
CN201810641401.3A 2017-11-16 2018-06-21 A kind of video image transmission method and data frame structure based on HDMI system Pending CN109803134A (en)

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