EP4612909A1 - Procédé de gestion du téléchargement par un terminal de lecture d'un contenu numérique accessible sous plusieurs formats - Google Patents
Procédé de gestion du téléchargement par un terminal de lecture d'un contenu numérique accessible sous plusieurs formatsInfo
- Publication number
- EP4612909A1 EP4612909A1 EP23793396.5A EP23793396A EP4612909A1 EP 4612909 A1 EP4612909 A1 EP 4612909A1 EP 23793396 A EP23793396 A EP 23793396A EP 4612909 A1 EP4612909 A1 EP 4612909A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- content
- calculation
- formats
- terminal
- image
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/23439—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements for generating different versions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44209—Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/4424—Monitoring of the internal components or processes of the client device, e.g. CPU or memory load, processing speed, timer, counter or percentage of the hard disk space used
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/81—Monomedia components thereof
- H04N21/8146—Monomedia components thereof involving graphical data, e.g. 3D object, 2D graphics
- H04N21/8153—Monomedia components thereof involving graphical data, e.g. 3D object, 2D graphics comprising still images, e.g. texture, background image
Definitions
- TITLE Method for managing the downloading by a reading terminal of digital content accessible in several formats
- the field of the invention is that of managing the restitution of digital multimedia content, namely digital audio and/or video content. More specifically, the invention relates to managing the selection of the type of content to download from a set of available content.
- the targeted contents are encoded and as such require decoders specific to the type of content to be decoded for restitution on a restitution device
- Content may be an image, audio content, video content, or any other similar content. We will see below that the content used to illustrate the invention is an image.
- the restitution, on a restitution device, of a user interface including images requires making the images available on a server.
- the images are then downloaded, decoded by a decoder and displayed on a rendering device.
- accelerated image decoders Today, video playback devices are equipped with hardware image decoders (called accelerated image decoders or accelerators) that support only a limited number of compression formats.
- Reading terminals that do not have a hardware decoding accelerator perform decoding through the processor CPU (English acronym for “Central Processing Unit”) of the reading terminal, in a software manner, which requires much more decoding time than when it is carried out via a hardware decoder. It can therefore happen that an image having a high compression rate, therefore downloaded quickly, suffers a delay in restitution due to the absence of the decoder specific to this type of image on the reading terminal.
- the compression formats WebP and JPEG Anglo-Saxon acronym for “Joint Photography Experts Group”.
- the WebP format is an image format that has a better compression rate than the JPEG format; there can be a ratio of two between the weight in Kilobytes of a WebP image and that of a JPEG image for equivalent restitution quality.
- the duration before rendering a WebP image is optimal if a decoder specific to the WebP format is installed on the reading terminal; However, today this is not always the case. In fact, only the most recent or high-end devices are equipped with such a decoder. If the reading terminal is not equipped with a hardware decoder, of the GPU type (English acronym for “Graphics Processing Unit”), specific to the WebP format, the decoding is then done by the processor of the reading terminal, so software, which requires much more time.
- the invention improves the situation.
- the invention relates to a method for managing the download, from a communications network, by a terminal of digital content accessible in several formats, the terminal comprising several types of content decoders capable of decoding several content formats respectively, characterized in that it includes, for different formats of the same content, a calculation of the respective waiting times before restitution of the content and in that the content format selected to be downloaded is a function of the result of the calculation.
- the invention is therefore based on a calculation of the predictable waiting time before restitution to decide, when several formats of the same content are available, the content format to download and restore.
- the selected format will not necessarily be the format associated with the best compression rate; a content format associated with a lower compression rate which may be associated with a lower waiting time before restitution.
- the invention ensures an optimal duration before restitution. For example, it may therefore be more interesting to retrieve JPEG images, rather than WebP images, which are larger in kilobytes to download but faster to decode.
- the example chosen to illustrate the invention aims for the shortest possible duration before restitution.
- the invention is not limited to a target duration before restitution as short as possible.
- the target duration before restitution can be the longest duration, or another duration chosen depending on the context.
- the calculation is carried out for content whose associated decoder is present in the reading terminal.
- This first mode makes it possible to exclude content which would be decoded by the CPU processor which consumes more decoding time than a hardware decoder.
- the calculation of the waiting time before restitution comprises a first calculation of a duration for downloading the content, and a second calculation of a content decoding time.
- the result of the first calculation is reused several times during subsequent calculations of waiting times before restitution. This mode saves time for calculating the expected duration before restitution by retaining the first calculation several times during successive calculations for estimating waiting times before restitution and therefore by not recalculating the first duration each time. Indeed, in a network in which the bandwidth fluctuates very little, the first calculation does not need to be recalculated for each calculation. This time saving speeds up the selection of content and therefore its restitution.
- the content is downloaded via a communication network having a fluctuating bandwidth; in this configuration, the result of the first calculation is reused as long as the bandwidth is within a given bandwidth interval.
- This third mode reduces the number of times the first calculation is performed; This reduction in the number of calculations carried out accelerates the selection of content and therefore its restitution.
- the invention relates to an entity for managing the downloading, from a communications network, by a terminal, of digital content accessible in several formats, the terminal comprising several types of content decoders capable of decoding several content formats respectively, characterized in that it comprises a processor configured to carry out, for different formats of the same content, a calculation of the respective waiting times before rendering the content, and select the selected content format to download depending on the calculation result.
- the invention relates to a reader terminal comprising a management entity as defined above.
- the invention relates to a data medium on which at least one series of program code instructions has been stored for the execution of a management method as defined above.
- Figure 1 represents a progressive download architecture on the Internet based on the use of adaptive streaming according to one embodiment of the method of the invention
- Figure 2 schematically illustrates the hardware structure of a multimedia stream reader terminal
- FIG. 3 illustrates steps of one embodiment.
- a computer system SYS comprising an SRV server from which content can be downloaded, and a reading terminal STB from which content can be read.
- IMG1/IMG2 digital content that have been encoded or compressed in different ways are accessible from the SRV server.
- the reading terminal STB further comprises a download module for requesting a download of content stored on the SRV server.
- the STB reading terminal is connected to a television set, via a COMM2 communication module of the HDMI link type.
- the IMG1/IMG2 encoded contents stored on the SRV server are capable of being decoded by specific decoders DEC1 and DEC2, respectively.
- a decoder decodes the content and requires restitution of the content. Decoding can be carried out either by a hardware decoder or by a software decoder; the software decoder is managed by the processor while a hardware decoder is equipped with a processor separate from the CPU processor.
- software decoding uses the CPU processor to decode and read content while GPU type DEC1/DEC2 hardware decoding is mainly based on a graphics processing unit, or GPU, which is more efficient than a CPU processor for process multimedia content.
- the WebP format is an image format that has a higher compression rate than the JPEG compression rate. There is a ratio of two between the weight in KB of a WebP image compared to a JPEG image for equivalent quality. There is therefore a certain gain to be favored, when optimal image quality is sought, by downloading content encoded in WebP format rather than JPEG.
- the decoder reading terminal STB receives a request for access to an image.
- the same image is encoded in several formats.
- the decoder reading terminal STB recovers information for each image format, the size in kilobytes of the different encoded images and the types of formats, namely in our example JPEG and WebP. Other information can be retrieved such as image resolution, or other information that may have an impact on the waiting time before restitution.
- MB Mega Bytes.
- the user's bandwidth (calculated by a HAS-type algorithm) is lOMo.
- the JPEG image download time will therefore be 0.15 seconds.
- the same image encoded in WebP has a size of 1MB and requires a download time of 0.1 seconds.
- the second calculation consists of determining according to the capabilities of the terminal, namely according to the presence or not of the hardware decoder specific to the JPEG or WebP image, and the characteristics of the image (resolution / weight in KB) the predictable decoding time of the image.
- This second calculation could also include the transmission delay of the decoded image until the image is restored; however, we consider in this example that this delay is of no interest due to the fact that it is substantially the same for all the decoded images and negligible compared to the decoding delay.
- retrieving an image from a server includes two durations, namely the download duration and the decoding duration; the other durations, namely the duration of transmission of a request to download an image, or the delay of transmission of the decoded image to the screen, or any other durations are not taken into account in our example because they are of approximately equal duration regardless of the image format selected.
- the expected download time added to the expected decoding time of the JPG image (0.15 + 0.05) gives 0.155 sec of time before restitution.
- the expected download time added to the expected decoding time of the JPG image, download time added to the decoding of the WebP image (0.1 + 0.25) gives 0.35 sec of waiting time before restitution.
- the JPG image is selected because the expected waiting time before rendering is much shorter than with the WebP image.
- the management entity ENT therefore selects the JPEG image to download, of lower quality but whose duration before restitution is the shortest.
- the reading terminal STB requests a download of the JPEG image from the server.
- the reading terminal STB receives the selected JPEG image and decodes this image during a seventh step.
- the JPEG image is restored.
- the result of the first calculation can be kept several times during subsequent calculations. Indeed, in a network in which the bandwidth fluctuates very little, performing the overall calculation (first calculation and second calculation) without performing the first calculation, namely the calculation of the download time, each time, reduces the calculation time to the calculation time linked to the decoding duration.
- the duration before restitution is based solely on the second duration linked to the type of decoder present on the reading terminal. In this mode, the download time is not taken into account.
- an IMG1 and IMG2 image not having a specific decoder present in the reading terminal STB is not accessible for selection for downloading.
- the reading terminal only includes the JPEG decoder and no WebP decoder; in this case the WebP image is not selectable for download. Only the JPEG image is available for download.
- This variant is interesting when we consider that the decoding time carried out by the CPU processor is, in all cases, greater than the decoding time carried out by a hardware decoder.
- a software component can correspond as well to a software component as to a hardware component or a set of hardware and software components, a software component itself corresponding to one or more programs or subprograms computer or more generally to any element of a program capable of implementing a function or a set of functions as described for the modules concerned.
- a hardware component corresponds to any element of a hardware assembly capable of implementing a function or a set of functions for the module concerned (integrated circuit, smart card, memory card, etc. .)
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Databases & Information Systems (AREA)
- Computer Graphics (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Information Transfer Between Computers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2211367A FR3141583A1 (fr) | 2022-10-31 | 2022-10-31 | Procédé de gestion du téléchargement par un terminal de lecture d’un contenu numérique accessible sous plusieurs formats |
| PCT/EP2023/079514 WO2024094465A1 (fr) | 2022-10-31 | 2023-10-23 | Procédé de gestion du téléchargement par un terminal de lecture d'un contenu numérique accessible sous plusieurs formats |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4612909A1 true EP4612909A1 (fr) | 2025-09-10 |
Family
ID=85937333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23793396.5A Pending EP4612909A1 (fr) | 2022-10-31 | 2023-10-23 | Procédé de gestion du téléchargement par un terminal de lecture d'un contenu numérique accessible sous plusieurs formats |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4612909A1 (fr) |
| FR (1) | FR3141583A1 (fr) |
| WO (1) | WO2024094465A1 (fr) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10652302B1 (en) * | 2018-04-06 | 2020-05-12 | Twitter, Inc. | Fast loading and display of image previews |
| CN112911337B (zh) * | 2021-01-28 | 2023-06-20 | 北京达佳互联信息技术有限公司 | 用于配置终端设备的视频封面图片的方法和装置 |
-
2022
- 2022-10-31 FR FR2211367A patent/FR3141583A1/fr active Pending
-
2023
- 2023-10-23 WO PCT/EP2023/079514 patent/WO2024094465A1/fr not_active Ceased
- 2023-10-23 EP EP23793396.5A patent/EP4612909A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024094465A1 (fr) | 2024-05-10 |
| FR3141583A1 (fr) | 2024-05-03 |
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