# US 8,787,446 B2 · Method of transmitting data

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- Number: US 8,787,446 B2
- Document ID: US8787446B2
- Status: Granted
- Kind: B2
- Application number: 11/863,082
- Filed: 2007-09-27
- Published: 2008-04-03
- Granted: 2014-07-22
- Earliest claimed: 2006-09-28
- Assignees: LG Electronics Inc.
- Applicants: Seung Hyun Choi
- Inventors: Seung Hyun Choi
- Web page: https://patentgrep.com/patent/US8787446B2

## CPC

- H04N 5/765: Interface circuits between an apparatus for recording and another apparatus
- G08B 13/19645: {Multiple cameras, each having view on one of a plurality of scenes, e.g. multiple cameras for multi-room surveillance or for tracking an object by view hand-over}
- G08B 13/19667: {Details realated to data compression, encryption or encoding, e.g. resolution modes for reducing data volume to lower transmission bandwidth or memory requirements}
- H04N 7/181: {for receiving images from a plurality of remote sources}
- H04N 21/21805: {enabling multiple viewpoints, e.g. using a plurality of cameras}
- H04N 21/234327: {by decomposing into layers, e.g. base layer and one or more enhancement layers}
- H04N 21/4312: {involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations}
- H04N 21/4314: {for fitting data in a restricted space on the screen, e.g. EPG data in a rectangular grid}
- H04N 5/91: Television signal processing therefor
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS

## Abstract

A method and device for transmitting data are discussed. In an embodiment of the present invention, a display state of image data for which transmission is requested is checked, and all or part of image data is transmitted depending on the checked state. The image data is downsampled and compressed into N layers having small-size screens, and all or some of the N compressed layers can be transmitted. In an embodiment, when the display state is in a separation display mode, some of the N layers created from image data for each channel for which transmission is requested are transmitted. When the display state is in a 1 channel display mode, all N layers created from image data for a channel for which transmission is requested are transmitted.

## Claims

### Claim 1

A method of transmitting image data via a multi-channel Digital Video Recorder (DVR), the method comprising:
receiving, from a plurality of cameras via a plurality of channels, a plurality of image data, respectively;
downsampling, by the multi-channel DVR, each of the plurality of image data into N layers corresponding to different display sizes of each of the plurality of image data, respectively, each of the N layers being smaller in size than an original size of each of the corresponding plurality of image data, an nth layer of the N layers being generated by collecting every nth pixel of each of N pixels of each of the corresponding plurality of image data in a lateral and vertical direction, where n is a natural number smaller than or equal to N and N is a natural number larger than 1;
compressing the downsampled N layers for the different display sizes of each of the corresponding plurality of image data; and
transmitting, to a counterpart DVR connected to the multi-channel DVR via a network, more than one of the downsampled and compressed N layers for displaying each of more than one of the corresponding plurality of image data of a particular size on the counterpart DVR,
wherein a first layer of each the more than one of the downsampled and compressed N layers for displaying each of more than one of the corresponding plurality of image data of the particular size is transmitted to the counterpart DVR and subsequently remaining layers of each the more than one of the downsampled and compressed N layers for displaying each of more than one of the corresponding plurality of image data of the particular size are transmitted to the counterpart DVR, and
wherein, when a display size of the counterpart DVR for a particular image data of the corresponding plurality of image data is greater than a screen size of the downsampled and compressed N layers for displaying the particular image data of the particular size, all of the downsampled and compressed N layers for displaying the particular image data of the particular size are transmitted.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the image data is downsampled in a lateral direction and a vertical direction at a rate of 1:n (where n×n=N, n>1), thus forming a single layer.

### Claim 3 (depends on 1)

The method according to claim 1, wherein, when the counterpart DVR is in a separation display mode, all or some of the more than one of the downsampled and compressed N layers for displaying each of more than one of the corresponding plurality of image data of the particular size, are transmitted to the counterpart DVR.

### Claim 4 (depends on 1)

The method according to claim 1, wherein a transmission sequence of respective layers is adjusted prior to the transmission of the downsampled and compressed N layers for displaying the particular image data of the particular size.

### Claim 5 (depends on 1)

The method according to claim 1, wherein, when the transmission of each of more than one of the corresponding plurality of image data of the particular size is requested, information about numbers of respective channels for which transmission is requested, and information about a display size allocated to each channel are transmitted therewith.

### Claim 6 (depends on 1)

The method according to claim 1, wherein each of the layers includes a header.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the header includes the following:
information about a number of a channel to which a given layer belongs,
information about the number of layers included in the channel to which the given layer belongs,
information about a number of the given layer, and
information about a screen size of the given layer.

### Claim 8

A multi-channel Digital Video Recorder (DVR) for transmitting image data, the device comprising:
a data processor configured to:
receive, from a plurality of cameras via a plurality of channels, a plurality of image data, respectively,
downsample each of the plurality of image data into N layers corresponding to different display sizes for each of the plurality of image data, respectively, each of the N layers being smaller in size than an original size of each of the corresponding plurality of image data, an nth layer of the N layers being generated by collecting every nth pixel of each of N pixels of each of the corresponding plurality of image data in a lateral and vertical direction, where n is a natural number smaller than or equal to N and N is a natural number larger than 1, and
compress the downsampled N layers for the different display sizes of each of the corresponding plurality of image data; and
a transmitting unit to transmit, to a counterpart DVR connected to the multi-channel DVR via a network, at least one of the downsampled and compressed N layers for a particular size for displaying each of more than one of the corresponding plurality of image data on the counterpart DVR,
wherein, the transmitting unit is configured to transmit a first layer of each the more than one of the downsampled and compressed N layers for displaying each of more than one of the corresponding plurality of image data of the particular size to the counterpart DVR and subsequently transmit remaining layers of each the more than one of the downsampled and compressed N layers for displaying each of more than one of the corresponding plurality of image data of the particular size to the counterpart DVR, and
wherein, when a display size of the counterpart DVR for a particular image data of the corresponding plurality of image data is greater than a screen size of the downsampled and compressed N layers for displaying the particular image data of the particular size, all of the downsampled and compressed N layers for displaying the particular image data of the particular size are transmitted by the transmitting unit.

### Claim 9 (depends on 8)

The device according to claim 8, wherein the data processor downsamples the image data in a lateral direction and a vertical direction at a rate of 1:n (where n×n=N, n>1), thus forming a single layer.

### Claim 10 (depends on 8)

The device according to claim 8, wherein, when the counterpart DVR is in a separation display mode, all or some of the more than one of the downsampled and compressed N layers for displaying each of more than one of the corresponding plurality of image data of the particular size, are transmitted to the counterpart DVR.

### Claim 11 (depends on 8)

The device according to claim 8, wherein each of the layers includes a header.

### Claim 12 (depends on 11)

The device according to claim 11, wherein the header includes the following:
information about a number of a channel to which a given layer belongs,
information about the number of layers included in the channel to which the given layer belongs, and
information about a number of the given layer, and information about a screen size of the given layer.