WO2016129899A1 - 3dtv 방송 송수신 장치 - Google Patents
3dtv 방송 송수신 장치 Download PDFInfo
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- WO2016129899A1 WO2016129899A1 PCT/KR2016/001319 KR2016001319W WO2016129899A1 WO 2016129899 A1 WO2016129899 A1 WO 2016129899A1 KR 2016001319 W KR2016001319 W KR 2016001319W WO 2016129899 A1 WO2016129899 A1 WO 2016129899A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/597—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding specially adapted for multi-view video sequence encoding
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- the present invention relates to a 3DTV broadcast transmission and reception apparatus, and in particular, in an in-band mobile broadcasting system using a hierarchical video coder, while maintaining compatibility with a hierarchical video decoder of an existing receiver, a 3DTV service is provided without additional data for additional video. It relates to a 3DTV broadcast transmitting and receiving device that can be.
- Hierarchical video encoding is an encoding scheme developed to provide multimedia contents for various networks and user environments.
- Hierarchical video encoding encodes video information in a hierarchical manner in order to support various resolutions, image quality, frame rate, etc. in one bitstream, and a receiving terminal selectively extracts part or all of the bitstream according to a reception condition. Only image information suitable for a user environment can be decoded and used.
- in-band mobile broadcasting system transmits reference video and additional video to fixed and mobile broadcasting channels, respectively, and simultaneously supports 3DTV service while satisfying backward compatibility with existing 2D broadcasting service without additional bandwidth allocation. Can provide.
- the existing fixed and mobile broadcasting converged 3DTV schemes can be used only in the simulcast broadcasting system in which both the reference video and the additional video corresponding to a different point of view are transmitted. Therefore, in a hierarchical video encoding-based in-band mobile broadcasting service environment, it is impossible to provide a 3DTV service without transmitting additional data for an additional video corresponding to a viewpoint different from the reference video.
- the hierarchical video coding method that transmits the same view data hierarchically is efficient to provide 2D service in broadcasting and communication video service environment, but converged 3DTV which requires images from different viewpoints such as reference video and additional video. Service provision is not possible.
- the problem to be solved by the present invention is to maintain the compatibility with the hierarchical decoder of the receiving device in the in-band mobile broadcast system using a hierarchical encoder, while the amount of the same as the fused 3DTV without additional data (or reference video) It is to provide an apparatus and method for transmitting and receiving 3DTV broadcasting that can provide a stable 3DTV service.
- a broadcast transmission method of a 3DTV broadcast transmission device may include generating base layer data by encoding an additional image, generating enhancement layer data by encoding a correlation image between a base image and a video decoded from the base layer stream, and the base layer data and the Transmitting enhancement layer data.
- the generating of the base layer data may include down-sampling the additional video and then encoding the base layer data.
- the generating of the enhancement layer data may include up-sampling the decoded image from the base layer stream and then extract the correlated image. It may comprise the step of generating.
- the transmitting may include converting the base layer data and the enhancement layer data into at least a transport stream, and transmitting the at least one transport stream.
- the transmitting of the at least one transport stream may include transmitting a transport stream corresponding to the base layer data to a mobile TV channel of a mobile network, and transmitting a transport stream corresponding to the enhancement layer data to a fixed TV channel of a broadcast network. It may include a step.
- Transmitting the at least one transport stream may comprise modulating the at least one transport stream with a set modulation scheme.
- the 3DTV broadcasting transmission method may further include selecting one image among the left image and the right image having different viewpoints as the reference image, and selecting the other image as the additional image.
- a broadcast receiving method of a 3DTV broadcast receiving apparatus includes receiving base layer data encoded with an additional video, receiving enhancement layer data encoded with a correlated image between a base video and a video decoded from the base layer data, and decoding the base layer data. Acquiring the additional image; obtaining the correlation image by decoding the enhancement layer data; acquiring the reference image using the additional image and the correlation image; and among the additional image and the reference image Providing a broadcast service using at least one.
- Receiving the encoded base layer data includes receiving the encoded base layer data through a first transport channel, and receiving the encoded enhancement layer data comprises encoding a second transport channel. Receiving enhancement layer data.
- the providing may include synthesizing the additional image and the reference image to provide a 3D image.
- the providing may include providing a 2D image using the additional image or the reference image.
- One image among the left image and the right image having different viewpoints may be the reference image, and the other image may be the additional image.
- an apparatus for transmitting 3DTV broadcasting includes a hierarchical encoder and a transmitter.
- the hierarchical encoder generates base layer data by encoding an additional image, and generates enhancement layer data by encoding a correlation image between a base image and an image decoded from the base layer stream.
- the transmitter converts and transmits the base layer data and the enhancement layer data into at least one transport stream.
- the apparatus for transmitting 3DTV broadcasting may further include a multiplexer for multiplexing the base layer data and the enhancement layer data and transmitting the multiplexer to the transmitter.
- the apparatus for transmitting 3DTV broadcasting may further include a down-sampling converter which down-samples the additional video and transmits the down-sampled image to the hierarchical encoder. An image can be generated.
- the transmitter may convert the base layer data and the enhancement layer data into different transport streams.
- the transmitter may transmit a transport stream corresponding to the base layer data to a mobile TV channel of a mobile network, and transmit a transport stream corresponding to the enhancement layer data to a fixed TV channel of a broadcast network.
- the apparatus for transmitting 3DTV broadcasts may further include an image selector configured to select one image from among left and right images having different viewpoints as the reference image, and select the other image as the additional image.
- a 3DTV broadcast receiving apparatus includes a receiver, a hierarchical decoder, and a playback unit.
- the receiver receives base layer data encoding an additional image and enhancement layer data encoding a correlation image between a base image and an image decoded from the base layer data.
- the hierarchical decoder decodes at least one of the base layer data and the enhancement layer data.
- the playback unit provides a broadcast service using at least one image obtained through the hierarchical decoder.
- the hierarchical decoder may obtain the additional image by decoding the base layer data, obtain the correlation image by decoding the enhancement layer data, and obtain a reference image by using the additional image and the correlation image.
- the playback unit may provide a 3D image by synthesizing the additional image and the reference image, or provide a 2D image using the additional image or the reference image.
- the 3D content required for the converged 3DTV service can be efficiently generated and transmitted in a broadcast service environment applied to a hierarchical encoder, a wider broadcast than the conventional method, which was only capable of transmitting 2D services. Service can be provided.
- the 3D service can be supported by various combinations of resolutions according to the broadcaster's service model.
- the 3D image synthesis method according to an embodiment of the present invention is not only a converged 3DTV broadcasting environment but also a service environment through all broadcast / communication media, video storage media such as DVD / Blu-ray Disc, and files. It is applicable to all fields to which hierarchical video encoding / decoding methods are applied.
- FIG. 1 is a diagram illustrating an apparatus for transmitting 3DTV broadcasting according to an exemplary embodiment of the present invention.
- FIG. 2 is a view showing a 3DTV broadcast transmission method according to an embodiment of the present invention.
- FIG. 3 is a diagram illustrating an apparatus for receiving 3DTV broadcasts according to an exemplary embodiment of the present invention.
- FIG. 4 is a view showing a 3DTV broadcast receiving method according to an embodiment of the present invention.
- FIG. 5 is a diagram illustrating the concept of a 3DTV broadcasting service according to an exemplary embodiment of the present invention.
- FIG. 1 is a diagram illustrating an apparatus for transmitting 3DTV broadcasting according to an embodiment of the present invention
- FIG. 2 is a flowchart illustrating a method for transmitting 3DTV broadcasting according to an embodiment of the present invention.
- Content transmitted by the 3DTV broadcasting transmission apparatus 100 shown in FIG. 1 may be an image, a video, a text, and the like.
- a three-dimensional (3D) image among the images may be a left image and a right image having different viewpoints. It may include an image.
- One of the left image and the right image may be used as a base image, and the other may be used as an additional image.
- the additional image may mean an image used to form one 3D image by pairing with a reference image.
- the 3DTV broadcasting transmission apparatus 100 includes an image selecting unit 110, a down-sampling converter 120, a hierarchical coder 130, and a multiplexer 140. And a transmission unit 150.
- the image selector 110 selects an additional image and a reference image (S210).
- the image selecting unit 110 selects one image of the left image and the right image as an additional image, and transfers the additional image to the down sampling converter 120, selects another image as the reference image, and layeres the reference image. It passes to the enemy encoder 130.
- the left image may be selected as the reference image
- the right image may be selected as the additional image
- the left image may be selected as the additional image.
- the down sampling converter 120 down-samples the additional video and transmits it to the hierarchical encoder 130 (S220).
- the left image and the right image may be an image having ultra high definition (UHD) resolution, and the additional image may be down sampled at an HD resolution.
- UHD ultra high definition
- the hierarchical encoder 130 encodes the down-sampled additional picture and the reference picture by using a modified hierarchical coding method to generate base layer data and enhancement layer data.
- the modified hierarchical coding scheme may mean a modified scheme of scalable high efficiency video coding (SHVC). That is, the hierarchical encoder 130 generates base layer data by encoding down-sampled additional images (S230), and encodes a correlation image between a decoded image (that is, an additional image) and a reference image from the base layer data and enhances the enhancement layer.
- SHVC modified scheme of scalable high efficiency video coding
- the hierarchical encoder 130 generates base layer data by encoding down-sampled additional images (S230), and encodes a correlation image between a decoded image (that is, an additional image) and a reference image from the base layer data and enhances the enhancement layer.
- Generate data S240
- the correlation image refers to an image generated by using a decodable image (ie, an additional
- the correlation image may be a difference image corresponding to different information between an image that can be decoded from base layer data (ie, an additional image) and a reference image.
- base layer data ie, an additional image
- the hierarchical encoder 130 up-samples the decodable image from the base layer data and compresses the difference image between the up-sampled image and the reference image to correct the difference in resolution between the base image and the down-sampled additional image.
- Generate enhancement layer data may be a difference image corresponding to different information between an image that can be decoded from base layer data (ie, an additional image) and a reference image.
- the SHVC method generates base layer data and enhancement layer data using one image (2D image).
- the modified hierarchical coding scheme according to an embodiment of the present invention generates base layer data and enhancement layer data by using different images, that is, additional video and reference video.
- the 3DTV broadcast receiving apparatus can obtain the reference image using the base layer data and the enhancement layer data. have.
- the hierarchical encoder 130 is the same as the SHVC method except that the reference image is used to generate the enhancement layer data, the detailed hardware structure of the hierarchical encoder 130 will be omitted.
- the multiplexer 140 multiplexes the base layer data and the enhancement layer data (S250).
- the transmitter 150 transmits the multiplexed base layer data and enhancement layer data (S260).
- the transmitter 150 converts the base layer data and the enhancement layer data into at least one transport stream and transmits the converted at least one transport stream.
- the transport stream may be referred to as a physical layer pipe (PLP) stream, or may be used in other terms according to the type of network to be transmitted.
- PLP physical layer pipe
- the transport stream corresponding to the base layer data may be transmitted to the mobile TV channel of the mobile network, and the transport stream corresponding to the enhancement layer data may be transmitted to the broadcasting network. Can be transmitted to a fixed TV channel.
- the base layer data and the enhancement layer data when converted into one transport stream, they may be transmitted through the same network.
- the transmitter 150 may modulate and transmit the converted at least one transport stream using a predetermined modulation scheme.
- the transmitter 150 may modulate each transport stream in a different modulation scheme. For example, a transport stream corresponding to base layer data may be modulated by a relatively high reception performance QPSK or 16-QAM method, and a transport stream corresponding to enhancement layer data is modulated by a 256-QAM method having high transmission efficiency. Can be.
- FIG. 3 is a diagram illustrating a 3DTV broadcast receiving apparatus according to an embodiment of the present invention
- FIG. 4 is a flowchart illustrating a 3DTV broadcast receiving method according to an embodiment of the present invention.
- the 3DTV broadcast receiving apparatus 300 includes a receiver 310, a demultiplexer 320, a hierarchical decoder 330, and a playback unit 340.
- the receiver 310 receives at least one transport stream transmitted from the 3DTV broadcast transmission device 100 in operation S410, demodulates the received at least one transport stream, and transmits the demodulated signal to the demultiplexer 320. .
- the demultiplexer 320 demultiplexes the base layer data and the enhancement layer data multiplexed by the 3DTV broadcasting transmission apparatus 100 and separates the base layer data and the enhancement layer data into operation S420.
- the hierarchical decoder 330 decodes the base layer data to obtain only an additional image, or hierarchically decodes the base layer data and the enhancement layer data to obtain a reference image (S430).
- the hierarchical decoder 330 may decode the base layer data and the enhancement layer data by hierarchical decoding to obtain an additional image and a correlation image, and generate a reference image using the obtained additional image and the correlation image. .
- the correlation image the difference image described above may be used.
- the hierarchical decoding method may include an SHVC decoding method or an HEVC decoding method.
- the hierarchical decoder 330 using the HEVC decoding method may decode only base layer data.
- the playback unit 340 may output the 2D image using only the acquired additional image or output the 3D image using the obtained additional image and the obtained reference image (S440).
- the mobile receiver may acquire an additional video from base layer data transmitted through a mobile TV channel of the mobile network and provide a mobile 2D service from the additional video.
- the 3DTV broadcast receiving apparatus 300 is a mobile receiver, since only base layer data needs to be received and decoded, another decoder capable of decoding the base layer data may be used instead of the hierarchical decoder 330. .
- the fixed receiver acquires an additional image from base layer data transmitted through a mobile TV channel of a mobile network, and improves layer data transmitted through a fixed TV channel of a fixed network. After obtaining the correlation image by using the obtained image and the reference image by using the correlation image.
- the fixed receiver may provide a 3D service by synthesizing the additional view video with the reference view video.
- signaling information including a playback time of the reference video, a playback time of the additional video, and error information between the playback time of the reference video and the additional video may be separately transmitted for synchronization thereof. Can be.
- FIG. 5 is a diagram illustrating the concept of a 3DTV broadcasting service according to an exemplary embodiment of the present invention.
- the base layer data of the additional video is generated by the 3DTV broadcasting transmission apparatus 100, and the enhancement layer data corresponding to the correlation image between the additional video and the reference video is generated.
- Base layer data and enhancement layer data are transmitted to the mobile TV channel of the mobile network and the fixed TV channel of the fixed network, respectively.
- the 3DTV broadcast receiving apparatus 300 since the 3DTV broadcast receiving apparatus 300 corresponding to the mobile receiver can receive only base layer data, the 3DTV broadcast receiving apparatus 300 provides a mobile HD 2D image by acquiring an additional image from the base layer data.
- the 3DTV broadcast receiving apparatus 300 corresponding to the fixed receiver may receive both base layer data and enhancement layer data. Therefore, the 3DTV broadcast receiving apparatus 300 corresponding to the fixed receiver may acquire an additional image from the base layer data, obtain a correlation image from the enhancement layer data, and then obtain the reference image using the additional image and the correlation image. . In this case, the 3DTV broadcast receiving apparatus 300 may provide a UHD 2D image using only a reference image according to a user's selection, and may provide a UHD 3D image using both an additional image and a reference image.
- the 3DTV broadcast receiving apparatus 300 may provide a 3D service without directly transmitting a reference image from the 3DTV broadcast transmitting apparatus 100.
- An embodiment of the present invention is not implemented only through the above-described apparatus and / or method, but may be implemented through a program that realizes a function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. Implementation can be easily implemented by those skilled in the art from the description of the above-described embodiments.
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Claims (20)
- 3DTV 방송 송신 장치의 방송 송신 방법으로서,부가영상을 부호화하여 기본계층 데이터를 생성하는 단계,기준영상과 상기 기본계층 스트림으로부터 복호된 영상간의 상관영상을 부호화하여 향상계층 데이터를 생성하는 단계, 그리고상기 기본계층 데이터와 상기 향상계층 데이터를 전송하는 단계를 포함하는 3DTV 방송 송신 방법.
- 제1항에서,상기 기본계층 데이터를 생성하는 단계는 상기 부가영상을 다운 샘플링한 후 부호화하는 단계를 포함하고,상기 향상계층 데이터를 생성하는 단계는 상기 기본계층 스트림으로부터 복호된 영상을 업 샘플링한 후 상기 상관영상을 생성하는 단계를 포함하는 3DTV 방송 송신 방법.
- 제1항에서,상기 전송하는 단계는상기 기본계층 데이터와 상기 향상계층 데이터를 적어도 전송 스트림으로 변환하는 단계, 그리고상기 적어도 하나의 전송 스트림을 전송하는 단계를 포함하는 3DTV 방송 송신 방법.
- 제3항에서,상기 적어도 하나의 전송 스트림을 전송하는 단계는상기 기본계층 데이터에 해당하는 전송 스트림을 이동망의 이동 TV 채널로 전송하는 단계, 그리고상기 향상계층 데이터에 해당하는 전송 스트림을 방송망의 고정 TV 채널로 전송하는 단계를 포함하는 3DTV 방송 송신 방법.
- 제3항에서,상기 적어도 하나의 전송 스트림을 전송하는 단계는 상기 적어도 하나의 전송 스트림을 설정된 변조방식으로 변조하는 단계를 포함하는 3DTV 방송 송신 방법.
- 제1항에서,시점이 서로 다른 좌영상과 우영상 중에서 하나의 영상을 상기 기준영상으로 선정하고, 다른 하나의 영상을 상기 부가영상으로 선정하는 단계를 더 포함하는 3DTV 방송 송신 방법.
- 3DTV 방송 수신 장치의 방송 수신 방법으로서,부가영상이 부호화된 기본계층 데이터를 수신하는 단계,기준영상과 상기 기본계층 데이터로부터 복호된 영상간 상관영상이 부호화된 향상계층 데이터를 수신하는 단계,상기 기본계층 데이터를 복호화하여 상기 부가영상을 획득하는 단계,상기 향상계층 데이터를 복호화하여 상기 상관영상을 획득하는 단계,상기 부가영상과 상기 상관영상을 이용하여 상기 기준영상을 획득하는 단계, 그리고상기 부가영상 및 상기 기준영상 중 적어도 하나를 이용하여 방송 서비스를 제공하는 단계를 포함하는 3DTV 방송 수신 방법.
- 제7항에서,상기 부호화된 기본계층 데이터를 수신하는 단계는 제1 전송 채널을 통해 상기 부호화된 기본계층 데이터를 수신하는 단계를 포함하고,상기 부호화된 향상계층 데이터를 수신하는 단계는 제2 전송 채널을 상기 부호화된 향상계층 데이터를 수신하는 단계를 포함하는 3DTV 방송 수신 방법.
- 제7항에서,상기 제공하는 단계는 상기 부가영상 및 상기 기준영상을 합성하여 3D 영상을 제공하는 단계를 포함하는 3DTV 방송 수신 방법.
- 제7항에서,상기 제공하는 단계는 상기 부가영상 또는 상기 기준영상을 이용하여 2D 영상을 제공하는 단계를 포함하는 3DTV 방송 수신 방법.
- 제7항에서,시점이 서로 다른 좌영상과 우영상 중에서 하나의 영상이 상기 기준영상이고, 다른 하나의 영상이 상기 부가영상인 3DTV 방송 수신 방법.
- 3DTV 방송 송신 장치로서,부가영상을 부호화하여 기본계층 데이터를 생성하고, 기준영상과 상기 기본계층 스트림으로부터 복호된 영상간의 상관영상을 부호화하여 향상계층 데이터를 생성하는 계층적 부호화기, 그리고상기 기본계층 데이터와 상기 향상계층 데이터를 적어도 하나의 전송 스트림으로 변환하여 전송하는 전송부를 포함하는 3DTV 방송 송신 장치.
- 제12항에서,상기 기본계층 데이터와 상기 향상계층 데이터를 다중화하여 상기 전송부로 전달하는 다중화기를 더 포함하는 3DTV 방송 송신 장치.
- 제12항에서,상기 부가영상을 다운 샘플링하여 상기 계층적 부호화기로 전달하는 다운 샘플링 변환부를 더 포함하고,상기 계층적 부호화기는 상기 기본계층 스트림으로부터 복호된 영상을 업 샘플링한 후 상기 상관영상을 생성하는 3DTV 방송 송신 장치.
- 제12항에서,상기 전송부는 상기 기본계층 데이터와 상기 향상계층 데이터를 각기 다른 전송 스트림으로 변환하는 3DTV 방송 송신 장치.
- 제15항에서,상기 전송부는 상기 기본계층 데이터에 해당하는 전송 스트림을 이동망의 이동 TV 채널로 전송하고, 상기 향상계층 데이터에 해당하는 전송 스트림을 방송망의 고정 TV 채널로 전송하는 3DTV 방송 송신 장치.
- 제15항에서,상기 시점이 서로 다른 좌영상과 우영상 중에서 하나의 영상을 상기 기준영상으로 선정하고, 상기 다른 하나의 영상을 상기 부가영상으로 선정하는 영상 선정부를 더 포함하는 3DTV 방송 송신 장치.
- 3DTV 방송 수신 장치로서,부가영상을 부호화한 기본계층 데이터와, 기준영상과 상기 기본계층 데이터로부터 복호된 영상간 상관영상을 부호화한 향상계층 데이터를 수신하는 수신부,상기 기본계층 데이터와 상기 향상계층 데이터 중 적어도 하나를 복호화하는 계층적 복호화기, 그리고상기 계층적 복호화기를 통해 획득된 적어도 하나의 영상을 이용하여 방송 서비스를 제공하는 재생부를 포함하는 3DTV 방송 수신 장치.
- 제18항에서,상기 계층적 복호화기는 상기 기본계층 데이터를 복호화하여 상기 부가영상을 획득하고, 상기 향상계층 데이터를 복호화하여 상기 상관영상을 획득하며, 상기 부가영상과 상기 상관영상을 이용하여 기준영상을 획득하는 3DTV 방송 수신 장치.
- 제19항에서,상기 재생부는 상기 부가영상 및 상기 기준영상을 합성하여 3D 영상을 제공하거나, 상기 부가영상 또는 상기 기준영상을 이용하여 2D 영상을 제공하는 3DTV 방송 수신 장치.
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