EP2936811A1 - Method and device for transmitting a sequence of images based on an adaptive region coding - Google Patents
Method and device for transmitting a sequence of images based on an adaptive region codingInfo
- Publication number
- EP2936811A1 EP2936811A1 EP13815088.3A EP13815088A EP2936811A1 EP 2936811 A1 EP2936811 A1 EP 2936811A1 EP 13815088 A EP13815088 A EP 13815088A EP 2936811 A1 EP2936811 A1 EP 2936811A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- image
- region
- coding
- sequence
- regions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
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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
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/164—Feedback from the receiver or from the transmission channel
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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
- H04N19/103—Selection of coding mode or of prediction mode
- H04N19/107—Selection of coding mode or of prediction mode between spatial and temporal predictive coding, e.g. picture refresh
-
- 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
- H04N19/103—Selection of coding mode or of prediction mode
- H04N19/114—Adapting the group of pictures [GOP] structure, e.g. number of B-frames between two anchor frames
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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
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/136—Incoming video signal characteristics or properties
- H04N19/14—Coding unit complexity, e.g. amount of activity or edge presence estimation
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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
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/167—Position within a video image, e.g. region of interest [ROI]
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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
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
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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
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
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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
- H04N19/20—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video object coding
- H04N19/23—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video object coding with coding of regions that are present throughout a whole video segment, e.g. sprites, background or mosaic
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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
- H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
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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
- H04N19/46—Embedding additional information in the video signal during the compression process
-
- 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
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
- H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
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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
- H04N19/119—Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
Definitions
- the field of the invention is that of the transmission of image sequences, particularly in the context of videoconferencing-type multimedia session, video streaming, remote monitoring, etc.
- the invention relates to maintaining or improving the quality of the images of a sequence transmitted in such contexts, especially when the transmission conditions change.
- the invention finds applications in all fields requiring the transfer of a sequence of images, or video, including in the context of video coding.
- IP IP type channel
- coding mode or coding strategy (or encoding) is meant in particular the choice of implementation of the coding performed at the coder / decoder.
- it may be an intra-coding mode, a hierarchical P-type inter coding mode (as defined in the document "H. 264 hierarchical P coding in the context of ultra-low delay, low complexity applications "Thomas Wiegand for example), an IPPP type inter-coding mode (for" image I, image P, image P, image P "), of an IPPPI type inter-coding mode (for" image I, image P, image P, image P, image I "), of a coding mode of" skip "type, etc.
- the quality of the video received by a client may be degraded, due to a network-level strangulation, a loss of data, or even a limitation of processing capacity at the end of the network. customer level.
- a disadvantage of the first two techniques proposed (a) and b)) is that they reduce the quality of the video, which leads to a degradation of the video received by the customer, in terms of the quality of the images or the fluidity images.
- this solution consists in sending an image in intra mode, which contains all the information of an image and is therefore large, in a channel that can only send data of small sizes.
- the technique d) consists of changing the video encoder and choosing a new video encoder, whose compression ratio is higher, so that the transmission rate is adapted to that of the transmission channel.
- a disadvantage of this technique lies in the additional processing cost generated on the side of the decoder. Indeed, the implementation of technique d) requires that the power of the processors, on the client side, be adapted to the cost requested by the new coder / decoder. If it is not adapted, the implementation of this solution leads to an accentuated degradation of the quality of the video, if the processor can not manage the computation requests ordered by the new coder / decoder, and the quality of the received image (at the output of the video decoder) is degraded.
- a degradation on one of the elements of the transmission chain usually leads to a more or less marked deterioration in the quality of the video received by the client.
- the invention proposes a solution to this problem, in the form of a method for transmitting a sequence of images, comprising the following steps:
- the invention is based on a new and inventive approach to the transmission of a sequence of images, making it possible to code different regions or zones of the images differently. In this way, it is possible to use a more robust encoding mode for a region of high interest (especially from the customer's point of view), and a less robust coding mode for a region of low interest.
- the customer does not detect the degradation of the image, because it is not, or little, degraded for the region or regions to which it gives interest (for example the center of the image), even if it is degraded for the region or regions that are not of significant interest (for example the background or edges of the image).
- the invention requires the use of a single coder (for example of the H.263, H.264, MPEG4 or other existing or future coder type), which can implement different modes or strategies. encoding the different regions of an image.
- a single coder for example of the H.263, H.264, MPEG4 or other existing or future coder type
- the step of determining a coding mode adapted to a region takes into account the content of the region.
- the determination step considers activity in the region.
- the images of the image sequence can be segmented in a similar way in two regions, a first region corresponding to the character and a second region corresponding to the background, and two different coding modes can be assigned to these two regions.
- the region corresponding to the character in this example shows a strong activity (movement of the character on the three images) and thus corresponds to an important region for the client, who receives and visualizes the video. Therefore, according to the invention, a robust coding mode is assigned to this region, which makes it possible to code this region with a good quality (for example as a hierarchical P-type coding mode).
- the region corresponding to the background in this example has little or no activity, and therefore corresponds to a region of lesser interest to the customer. Therefore, according to the invention, a less robust coding mode is assigned to this region, which makes it possible to code this region with a lower quality (for example as an IPPP type coding mode).
- some regions can therefore be encoded as a type I image and others as a P type image.
- the encoded image (s) using, for each of the regions, the coding mode adapted to the region, are then transmitted in a single video stream.
- the coding mode adapted to a region is defined for several images of the sequence.
- the coding modes belong to the group comprising:
- IPPP IPPP type of coding
- an IPPPI type of coding or "image I, image P, image P, image P, image I",
- any mode of coding can be applied independently on each of the regions of an image, for example according to the interest of the region.
- the examples of coding modes proposed relate more specifically to real-time transmissions, but other coding modes can be envisaged in the general case, in particular with type B images.
- the determined coding mode is a robust P-type hierarchical or IPPPI coding.
- the transmission method comprises a preliminary step of determining the transmission parameters of the image sequence.
- a first set of transmission parameters for example defining the transmission frequency of the images, the resolution of the images, the transmission rate, etc., can be negotiated / defined before transmission, when opening a multimedia session.
- a second "set of parameters" specific to the encoder is considered, for example defining the various coding / decoding modes authorized by the coder and the decoder. These coding / decoding modes depend in particular on the transmission parameters defined in the first set (such as the transmission frequency of the images, the resolution, etc., predefined).
- the transmission method comprises a step of updating the regions and coding modes adapted to each of the regions, periodic and / or taking into account a modification of the transmission channel.
- the adaptive scheme proposed according to this embodiment makes it possible to optimize the coding of the image sequence.
- this update step may be performed upon receipt by the encoder of information on the transmission channel ("feedback").
- At least one indicator can be inserted in the video stream, in order to identify the different regions of the image and / or to specify the coding mode used for each region.
- the invention relates to a device for transmitting an image sequence, comprising:
- coding means of the one or more images using, for each of the regions, the coding mode adapted to the region, and transmission means in a single video stream.
- Such a transmission device is particularly suitable for implementing the transmission method described above. It comprises for example a video coder of H.263, H.264, MPEG4, etc. type.
- This device may of course include the various characteristics relating to the transmission method according to the invention, which can be combined or taken separately. Thus, the features and advantages of this device are the same as those of the transmission method, and are not detailed further.
- the invention furthermore relates to a method for receiving an image sequence, comprising the following steps:
- Such a method is particularly adapted to receive a video stream as described above.
- This method may therefore include the various characteristics relating to the transmission method according to the invention.
- the characteristics and advantages of this reception method are the same as those of the transmission method, and are not detailed further.
- the invention relates to a device for receiving an image sequence, comprising:
- Such a reception device is particularly adapted to implement the reception method described above. It includes for example a video decoder type H.263, H.264, MPEG4, etc.
- This device may of course include the various characteristics relating to the reception method according to the invention, which can be combined or taken in isolation. Thus, the features and advantages of this device are the same as those of the reception method, and are not detailed further.
- the invention relates to one or more computer programs comprising instructions for implementing a transmission method and / or a reception method as described above, when this or these programs are run by a processor.
- transmission and / or reception methods according to the invention can be implemented in various ways, in particular in hard-wired form or in software form.
- the invention relates to at least one computer-readable recording medium on which a computer program is recorded. comprising computer executable instructions for carrying out a transmission method and / or a reception method as described above.
- Figure 1 shows the main steps of a transmission method according to a particular embodiment of the invention
- Figure 2 shows the main steps of a reception method according to a particular embodiment of the invention
- FIG. 3 illustrates an exemplary processing of an image of a sequence of images according to a particular embodiment of the invention
- Figures 4 and 5 respectively show the structure of a transmission device and a receiving device according to a particular embodiment of the invention.
- the general principle of the invention is based on the identification of different regions in at least one image of a sequence of images, and on the specific coding of these different regions, using a coding mode adapted for each region.
- Such an encoding mode is selected from a set of coding modes defined for the encoder used.
- a first encoding mode may be used to encode a first region of the image
- a second encoding mode to encode a second region of the image
- the image or images encoded by the encoder are transmitted in a single video stream.
- a transmission technique of a Seq image sequence according to a particular embodiment of the invention.
- a first step 11 at least one image of the Seq sequence identifies (Id) at least two distinct regions.
- the identification of different regions in an image can be implemented statically or dynamically, and manually or automatically.
- static it may be predetermined, depending on the video stream to be transmitted, that certain regions of the image (for example edges, corners) are of lesser interest to the user and therefore treated as regions whose quality can be degraded using a basic encoding mode.
- regions of the image for example edges, corners
- the other regions of the image for example the center, are considered of great interest by the client, and thus treated as regions whose quality must be preserved by using a robust coding mode.
- the regions can be predefined.
- the different regions are not predefined before transmission.
- known motion search techniques may be used to give more importance to active, moving regions at the expense of motionless, and thus static, regions.
- a coding mode adapted to the region is determined.
- any coding mode compatible with the encoder used can be applied independently to each of the regions, depending on the interest of the region, according to this particular embodiment.
- Such a mode or coding algorithm notably makes it possible to improve the quality and / or the resistance to losses.
- the proposed solution allows a non-uniform degradation of the image sequence in case of reduction of the capacity of the channel, whereas the existing solutions are based on an equivalent degradation (over the image) of the image sequence.
- the proposed solution therefore makes it possible, according to this particular embodiment, to further degrade the images of the sequence in the regions in which the quality perceived by the customer is of low interest, and to preserve a maximum of quality in the regions in which which quality perceived by the customer is paramount.
- the region is of low interest, one chooses a coding mode not retransmitting this region of the image in case of error.
- it is a region of the "background" image, that is to say not evolving in the image sequence, it is possible to choose a "skip" type of coding mode. , corresponding to a lack of transmission of information representative of this region.
- a "skip" type of coding mode corresponding to a lack of transmission of information representative of this region.
- the region is of significant interest, one can choose an encoding mode that returns the image I.
- a third step 13 the image or images of the sequence are coded, using, for each of the regions, the coding mode adapted to the region determined in the previous step.
- a single video stream is generated during this third step.
- first three steps 11, 12 and 13 can be implemented by an encoder, such as an H.263, H.264, MPEG4 coder, etc. for example.
- an encoder such as an H.263, H.264, MPEG4 coder, etc. for example.
- the video stream is transmitted to a client.
- a video stream is received comprising at least one coded picture by using a coding mode adapted to each region of the image or images, obtained as described above.
- the coded picture (s) are decoded, and the corresponding image sequence Seq is restored on a terminal of the client.
- Different decoding options may be envisaged, implementing either a conventional decoder or a separation of the data of the video stream according to the region of the image in order to subject each region of the image to a decoder adapted to the coding mode. used for the corresponding region.
- an image could be restored or refreshed at the client terminal once the information representative of the entire image received and decoded.
- it is possible to restore / refresh a region of the image (for example a region of interest, in which there is more movement) as soon as the information representative of this region of the image is received. and decoded.
- an image sequence representative of a television news program in which the scene consists of the faded background with a change in brightness, the presenter and a special correspondent, and an area at the foot of the stage indicating stock market or information banner.
- an image at a time t is decomposed into four regions:
- the region 32 containing the presenter which corresponds to a normal priority area from the point of view of the customer: application of a conventional encoding mode, for example of type I, P, P, P, P, I (in d In other words, we send the intra image of this region once in five: with the first image, with the sixth image, etc.);
- a less robust coding mode for example of type I, P, P, P, P, P, P, P, P, P, P, P, P, P, P, I (in other words, we send the intra image of this region once in ten: with the first image, with the eleventh image, etc.) . It is also possible to choose a coding mode that does not retransmit the region of the image (or a residue corresponds to this region of the image) in the event of data loss; on the region 34 containing the background / rest of the image: application of an even less robust coding mode.
- the "skip" encoding mode when the rest of the image is fixed, it is possible to use the "skip" encoding mode as soon as the quality of the background returned to the customer is sufficient. For example, we send the intra image of this region only once, then we do not code this region as long as there is no change in the background. In particular, it is possible to choose a coding mode that does not allow any retransmission in the event of error or loss of data. Thus, in case of error, no update of the bottom is requested, insofar as this region is of little interest to the customer.
- the invention makes it possible, according to at least one of its embodiments, to limit the degradation perceived by the client / user in the event of deterioration of the transmission conditions, since the special correspondent and the presenter remain fluid and well defined, and that the information banner / stock market price remains legible (though of lower quality than the special correspondent and the presenter). It is recalled that according to the techniques of the prior art, the image is degraded as a whole.
- the outgoing rate at the level of each participant, depends on the number of participants in this videoconference. For example, if the number of participants is 5, then each participant has an average of 400 kbs, and the quality of each participant's video transmission is then limited by this bit rate. Furthermore, if the number of participants increases, and especially if it doubles (10 participants), the bit rate allocated to each participant is halved, or 200 kbs, and the quality of the video sent by each participant is degraded, in a uniform manner for the entire image according to the known techniques of the prior art.
- the image of each participant is segmented into two different regions: a first region for the face and a second region for the background.
- Each of these regions takes a portion of the 200kbbit allocated, and a separate coding scheme is assigned to each of these regions, based on the interest associated with each region.
- the rate consumed by the face region while retaining the other original transmission parameters (size and frame rate), is less than 200 kbs (150 kbs for example), then no change in quality will be applied to this region (one retains a conventional encoding mode, or one uses a more robust coding mode to improve the quality of the face region, such as AIR or IPPPI coding).
- the rest of the flow (50 kbs) is allocated then for the background region, for which a less robust coding mode, such as IPPP coding, is used.
- the encoding mode is changed to use a less bandwidth-intensive encoding mode, such as hierarchical P-type coding, so as to use only a portion of the bit rate, for example 150 kbs.
- the remainder of the flow 50 kbs can then be allocated for the bottom region, for which a less robust coding mode, such as IPPP coding, is used.
- a region of lesser interest to the customer is refreshed less often.
- IPPP type coding P type coding hierarchical, "backchannel" type coding, AIR type coding, IPPPI type coding.
- both regions are transmitted in a single video stream.
- This treatment causes a loss of quality on the region corresponding to the bottom, which does not disturb the user, the bottom does not move or little, but the quality of the face area is preserved (or even improved). Thus, the degradation of the quality of the image caused by a decrease in the transmission rate is not perceived by the user.
- FIG. 4 shows the simplified structure of a transmission device implementing the transmission method according to a particular embodiment of the invention.
- This device comprises a RAM 41, a processing unit 42, equipped for example with a processor, and controlled by a computer program stored in a ROM 43.
- the code instructions of the program of For example, the computers are loaded into the RAM 41 before being executed by the processor of the processing unit 42.
- the processing unit 42 receives at least one image of a sequence of images as input.
- the processor of the processing unit 42 implements the steps of the transmission method described above, according to the instructions of the computer program 43, by applying a separate processing to the different regions of the image or images, and outputs a single video stream, comprising at least one coded picture using a coding mode adapted to each region of the image or images.
- the transmission device comprises, in addition to the memory 41, means for identifying, in at least one image of the sequence, at least two distinct regions, means for determining a coding mode adapted to each of the regions, encoding means of the one or more images, and transmission means in a single video stream. These means are controlled by the microprocessor of the processing unit 42.
- FIG. 5 shows the simplified structure of a reception device implementing the reception method according to a particular embodiment of the invention.
- This device comprises a RAM 51, a processing unit 52, equipped for example with a processor, and controlled by a computer program stored in a ROM 53.
- the code instructions of the program of For example, the computers are loaded into the RAM 51 before being executed by the processor of the processing unit 52.
- the processing unit 52 receives as input a single video stream.
- the processor of the processing unit 52 implements the steps of the reception method described above, according to the instructions of the computer program 53, for decoding and reproducing the coded picture (s) using a coding mode adapted to each region. of the images.
- the reception device comprises, in addition to the memory 51, means for receiving a single video stream, comprising at least one coded picture by using a coding mode adapted to each region of the picture or images, means for decoding and restitution of the image (s). These means are controlled by the microprocessor of the processing unit 52.
- the invention is implemented by means of software and / or hardware components.
- a software component corresponds to one or more computer programs, one or more subroutines of a program, or more generally to any element of a program or software capable of implementing a function or a program. set of functions.
- Such a software component is executed by a data processor of a physical entity (encoder, transmitter, terminal, decoder, receiver, transmission device, receiving device, etc.) and is capable of accessing the hardware resources of this device.
- physical entity memory, recording media, communication buses, input / output electronic boards, user interfaces, .
- a hardware component corresponds to any element of a hardware set (or “hardware”) able to implement a function or a set of functions. It may be a hardware component that is programmable or has an integrated processor for executing software, for example an integrated circuit, a smart card, a memory card, an electronic card for executing a firmware ( “Firmware”), etc.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1262548A FR3000350A1 (en) | 2012-12-21 | 2012-12-21 | METHOD AND DEVICE FOR TRANSMITTING AN IMAGE SEQUENCE, METHOD AND DEVICE FOR RECEIVING, CORRESPONDING COMPUTER PROGRAM AND RECORDING MEDIUM. |
PCT/FR2013/053063 WO2014096638A1 (en) | 2012-12-21 | 2013-12-13 | Method and device for transmitting a sequence of images based on an adaptive region coding |
Publications (1)
Publication Number | Publication Date |
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EP2936811A1 true EP2936811A1 (en) | 2015-10-28 |
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EP13815088.3A Ceased EP2936811A1 (en) | 2012-12-21 | 2013-12-13 | Method and device for transmitting a sequence of images based on an adaptive region coding |
Country Status (4)
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US (1) | US20160057431A1 (en) |
EP (1) | EP2936811A1 (en) |
FR (1) | FR3000350A1 (en) |
WO (1) | WO2014096638A1 (en) |
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WO2020200235A1 (en) | 2019-04-01 | 2020-10-08 | Beijing Bytedance Network Technology Co., Ltd. | Half-pel interpolation filter in intra block copy coding mode |
KR102635319B1 (en) | 2019-08-20 | 2024-02-07 | 베이징 바이트댄스 네트워크 테크놀로지 컴퍼니, 리미티드 | Selective use of alternative interpolation filters in video processing |
US11240284B1 (en) * | 2020-05-28 | 2022-02-01 | Facebook, Inc. | Systems and methods for application- and content-aware real-time video encoding |
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EP1734768A1 (en) * | 2005-06-15 | 2006-12-20 | Matsushita Electric Industrial Co., Ltd. | Adaptive video with intra/inter mode decision based on network congestion |
US8325822B2 (en) * | 2006-01-20 | 2012-12-04 | Qualcomm Incorporated | Method and apparatus for determining an encoding method based on a distortion value related to error concealment |
WO2010057170A1 (en) * | 2008-11-17 | 2010-05-20 | Cernium Corporation | Analytics-modulated coding of surveillance video |
KR102013240B1 (en) * | 2012-02-02 | 2019-08-22 | 삼성전자주식회사 | Method and apparatus for image encoding based on region characteristics, method and apparatus for image decoding based on region characteristics |
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2012
- 2012-12-21 FR FR1262548A patent/FR3000350A1/en not_active Withdrawn
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2013
- 2013-12-13 WO PCT/FR2013/053063 patent/WO2014096638A1/en active Application Filing
- 2013-12-13 EP EP13815088.3A patent/EP2936811A1/en not_active Ceased
- 2013-12-13 US US14/650,260 patent/US20160057431A1/en not_active Abandoned
Non-Patent Citations (2)
Title |
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See also references of WO2014096638A1 * |
SULLIVAN G J ET AL: "RATE-DISTORTION OPTIMIZATION FOR VIDEO COMPRESSION", IEEE SIGNAL PROCESSING MAGAZINE, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 15, no. 6, 1 November 1998 (1998-11-01), pages 74 - 90, XP011089821, ISSN: 1053-5888, [retrieved on 20020806], DOI: 10.1109/79.733497 * |
Also Published As
Publication number | Publication date |
---|---|
US20160057431A1 (en) | 2016-02-25 |
WO2014096638A1 (en) | 2014-06-26 |
FR3000350A1 (en) | 2014-06-27 |
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