TWI504264B - Video playback device and system thereof capable for selecting signal sources - Google Patents

Description

Video source playback device and system thereof

The present invention relates to a video playback device, and more particularly to a video playback device and system thereof.

With the popularity of the Internet and the advancement of multimedia applications, more and more teaching units use the Internet to achieve distance learning. It allows learners to cross-domain barriers while reducing the confusion between teachers and students. Therefore, students can browse the teaching video content by streaming or downloading to the remote server through the Internet connection.

However, in general distance teaching can only receive recordings blindly, and remote users cannot adjust their content (such as zooming the screen). In particular, some recordings may have their own screen layout. For example, a teaching slide (mother window) and a teacher and whiteboard screen (sub-window) are presented in a picture of the mother and child. When a remote student wants to view the contents of the whiteboard, it cannot enlarge the sub-window or swap the displayed contents of the child window. Therefore, students can only passively wait for the layout of the recorded content to change.

In addition, some distance teaching is a way to synchronize the scene with the remote. If the recorded content (or streaming to the far end) is the same as the content played on the spot, it sometimes causes problems for the live audience. For example, far The listener at the end may need to view the speaker's image, but the audience on the scene may already see the speaker directly, and may not need to repeatedly see the speaker on the projection screen.

In view of the above problems, the present invention provides a video playback device and system thereof for selecting a source, thereby solving the problem that the prior art cannot adjust the content to be browsed by the local end or the remote user.

An embodiment of the present invention provides a video playback device for a selectable source, including: at least one video receiving end, at least one sound source receiving end, a storage unit, and a local mixer. The video receiving end is used to connect to a video capture device to obtain a video signal. The sound source receiving end is used to connect a sound capturing device to obtain an audio signal. The storage device is electrically connected to the video receiving end and the sound source receiving end to store the video signal of each video capturing device and the sound signal of each sound capturing device. The local mixer is electrically connected to the video receiving end and the sound source receiving end to select a first source from the video signal of each video capturing device and the sound signal of each sound capturing device according to a first source setting. Combining and mixing the first source combination to generate a first output signal.

Another embodiment of the present invention provides a video playback device for a selectable source, including: a plurality of video receiving terminals, a storage unit, and a local mixer. The video receiving ends are respectively connected to a video capturing device to respectively obtain a video signal. The storage unit is electrically connected to the video receiving end to store the video signal of the video capturing device. The local mixer is electrically connected to the video receiving end to capture the video signal of the self-video device according to a first source setting. A first source combination is selected, and the first source combination is mixed to generate a first output signal processed by the layout.

Another embodiment of the present invention provides a video playback system for a selectable source, including: a video playback device and a server. The server signal is connected to the video playback device. The video playback device includes at least one video receiving end, at least one audio source receiving end, and a local mixer. The video receiving end is used to connect to a video capture device to obtain a video signal. The sound source receiving end is used to connect a sound capturing device to obtain an audio signal. The local mixer is electrically connected to the video receiving end and the sound source receiving end to select a first source from the video signal of each video capturing device and the sound signal of each sound capturing device according to a first source setting. Combining and mixing the first source combination to generate a first output signal. The server includes a storage unit for storing the video signal of each video capture device and the sound signal of each sound capture device.

In an embodiment, the first output signal comprises a video signal processed by the layout.

In an embodiment, the video playback device further includes a remote mixer electrically connected to the storage unit. The remote mixer selects a second source combination from the video signal of each video capture device stored in the storage unit and the sound signal of each sound capture device according to a second source setting, and mixes the second The source combines to generate a second output signal.

In an embodiment, the video playback system further includes a user equipment. The second output signal is transmitted to the user equipment, and the second source setting is from the user equipment.

In an embodiment, the video playback device further includes a smart navigation unit for evaluating the video signal and the audio signal, and updating at least one of the first source setting and the second source setting when an event is detected. .

According to the video playback device and system of the optional source of the present invention, the local-side live presentation content and the remotely presented recording content can be flexibly adjusted according to the requirements. Moreover, different remote users can personalize the content they view and/or how they are presented according to individual needs.

100‧‧‧Video playback system

200‧‧‧Video playback device

211, 213, 215‧ ‧ video receiving end

212, 214, 216‧‧ ‧ source receiving end

227‧‧‧Video output

228‧‧‧Source output

230‧‧‧ Controller

241‧‧‧Local Mixer

243‧‧‧Local encoder

250‧‧‧Communication unit

260‧‧‧ storage unit

271‧‧‧ Remote Mixer

273‧‧‧Remote encoder

281, 282‧‧‧ analog digital converter

290‧‧‧ busbar

300‧‧‧Video Capture Equipment

400‧‧‧Sound extraction equipment

500‧‧‧Video output device

600‧‧‧Sound output equipment

700‧‧‧User equipment

800‧‧‧Server

850‧‧‧Communication unit

860‧‧‧ storage unit

871‧‧‧ Remote Mixer

873‧‧‧Remote encoder

Sav‧‧‧ analog video signal

Sdv‧‧‧ digital video signal

Saa‧‧‧ analog sound signal

Sda‧‧‧ digital sound signal

1 is a circuit block diagram of a video playback system according to a first embodiment of the present invention; FIG. 2 is a circuit block diagram of a video playback system according to a second embodiment of the present invention; and FIG. 3 is a A circuit block diagram of a video playback apparatus of a third embodiment of the invention.

The following description is a means for those skilled in the art to effectively convey the substance of their work to other skilled in the art. Therefore, well-known methods, procedures, constructions, and circuits have not been described in detail to avoid obscuring the description.

It is to be understood that in the following, "an embodiment", the technical features, configurations, or characteristics described in connection with the embodiments may be included in at least one embodiment of the present invention. The phrase "in one embodiment" that appears in various places in the specification may refer to a plurality of different embodiments, separate embodiments. The examples or other embodiments are not mutually exclusive.

It is understood that when an element is referred to as "on" or "connected" to another element, it may be directly on or in connection with the other element. In contrast, when an element is referred to as “directly on” or “directly connected to” another element,

The terminology used herein is for the purpose of illustration and description. For example, the same element symbols in the entire text represent the same elements. Although the terms "first" and "second" are used herein to describe different elements, such elements are not limited by the terms. The term "or/and" used herein includes any and all combinations of one or more of the listed items. It must be understood that the singular forms "a", "the" It is also to be understood that the use of the terms "comprises" and "" / and the presence or addition of a combination thereof.

"Signal connection" as used in this document refers to the use of wired communication (such as wired network) and / or wireless communication (such as wireless network) to connect two devices or components to each other, and can transmit signals (or messages) to each other. ). It should be understood that "electrical connection" refers to the use of electrical coupling and/or electrical conduction to cause electrical signals to be transmitted between two devices or components.

It should be understood that the devices illustrated in the drawings are schematic in nature and are not intended to limit the actual shape of the device, and are not intended to limit the present invention. The scope of the embodiments.

Unless otherwise specified, terms (including technical and scientific terms) used herein have the same meaning as understood by those of ordinary skill in the art. It should also be understood that the terms (e.g., lexicographic terms) should be interpreted as having an explanation consistent with the meaning of the technology in the context of the present invention, and are not intended to be construed as an ideal or particular example unless explicitly defined herein.

1 is a circuit block diagram of a video playback system 100 in accordance with a first embodiment of the present invention.

As shown in FIG. 1, the video playback system 100 includes a video playback device 200, a video capture device 300, a sound capture device 400, a video output device 500, and a sound output device 600.

Here, the video capture device 300 can be a video camera, a physical projector, a network camera (IP cam), a camera, a multimedia player (such as a Blu-ray player), an electronic whiteboard, a tablet, a tablet, a mobile phone, and/or A device such as a computer that can output video signals. The sound capture device 400 can be a device that can output an audio signal such as a microphone, a video camera, a camera, a multimedia player (such as an MP3), a tablet, a mobile phone, and/or an audio. The video output device 500 can be a device that can display or process video signals, such as a television, a screen, a projector, and/or an image matrix switcher. The sound output device 600 can be a device that emits sound or processes sound for headphones, speakers, speakers, and/or mixers.

The video playback device 200 includes at least one video receiving terminal 211, at least one audio source receiving end 212, a video output terminal 227, and a sound source output terminal 228 for selectively collecting and outputting a plurality of sources. Video receiving terminal 211 is connected to video The device 300 is captured to obtain a video signal. The sound source receiving end 212 is connected to the sound capturing device 400 to obtain an audio signal. The video output terminal 227 is connected to the video output device 500, and the audio source output terminal 228 is connected to the sound output device 600 to output the result of the rounding.

In an teaching application, the video playback system 100 can be applied to teaching video. The video playback device 200 can be connected to a computer for playing a course slide, a microphone for listening to a lecturer, a camera for shooting an instructor and a whiteboard, a speaker for playing the voice of the lecturer received by the microphone, and a projector for playing a computer screen. . The video playback device 200 can integrate the slide image displayed by the computer and the lecture image captured by the camera, for example, a Picture In Picture (PIP), a Picture By Picture (PBP), or a picture-in-picture. Screen layout processing such as (Picture Out of Picture, POP). Finally, the processed video signal is transmitted to the projector output. For example, the embodiment of the present invention is not limited thereto, and may be a reconciliation between a video signal and an audio signal or a plurality of audio signals.

Here, how to perform the aggregation of multiple sound signals will be described using the same teaching application example. There are two sound signals in this teaching application example, one is the voice of the lecturer, and the other is the sound effect of the slide. In order to prevent the sound of the slide play from interfering with the voice of the lecturer, the intensity (ie, gain) of the two sound signals may be assigned a relative proportional relationship. In particular, adjustments can be made dynamically, such as reducing the sound of the slide show when the voice of the lecturer is detected. Finally, the two audio signals of the adjusted gain are integrated into an audio signal for output.

In an embodiment, the video receiving end 211 and the video output The terminal 227 can support a High Definition Multimedia Interface (HDMI), a Universal Serial Bus (USB), a Composite Video Connector, an S-Video, and a video graphic. Video Graphics Array (VGA), Digital Video Interface (DVI), Thunderbolt, DisplayPort, and/or Firewire are suitable for video transmission interfaces.

In an embodiment, the sound source receiving end 212 and the sound source output end 228 can be a wired transmission interface or a wireless transmission interface suitable for audio source transmission, such as TRS terminal, HDMI, composite terminal, Bluetooth, infrared, and the like.

As shown in FIG. 1, the video playback apparatus 200 further includes a controller 230, a storage unit 260, a local mixer 241, and a local encoder 243. The controller 230 is electrically connected between the storage unit 260 and the video receiving end 211 and the sound source receiving end 212. The storage unit 260 is electrically connected to the video receiving end 211 and the sound source receiving end 212. The local mixer 241 is electrically connected to the video receiving end 211 and the sound source receiving end 212. The local encoder 243 is electrically connected between the local mixer 241 and the video output terminal 227 and the audio source output terminal 228.

The controller 230 receives the video signal of the video capture device 300 and the audio signal of the sound capture device 400, and stores the received video signal and audio signal to the storage unit 260. Here, the storage unit 260 can be a storage medium such as a hard disk, a disk array, a memory card, a non-volatile memory (such as a flash memory), and/or a compact disk. The controller 230 can be a digital signal processor (DSP), a central processing unit, and embedded. Controllers, Field Programmable Gate Arrays (FPGAs) and/or multiplex processors.

The local mixer 241 can select a source combination from the video signal of each of the video capture device 300 and the audio signal of each of the sound extraction devices 400 according to the setting (herein referred to as "first source setting"). This is called "first source combination" and mixes the first source combination to generate a first output signal. Here, as also described in the foregoing teaching application example, since the lecturer and the whiteboard can be seen by the students in the classroom, the projector does not need to repeatedly display the images of the lecturer and/or the whiteboard. Therefore, the first source combination can be a video signal (ie, a slide image) output by the computer, a sound signal of the microphone, and an audio signal output by the computer (ie, the sound effect of the slide film). The local mixer 241 mixes the signals to generate a first output signal. Then, the local encoder 243 can perform video and speech encoding on the first output signal, and then output through the video output terminal 227 and/or the audio source output terminal 228. Here, the first output signal may include a video signal and/or an audio signal.

In one embodiment, the "mixing" is not limited to embedding the audio signal into the video signal, but still maintaining the signal separated from the video signal by the audio source output terminal 228 and the video output terminal 227.

In one embodiment, the first source setting is generated by the controller 230 with reference to the built-in usage context correspondence table. In the foregoing teaching application example, the context correspondence table may include a source corresponding to the different courses and a summary method thereof (for example, a source used for rendering the picture in the picture). In another embodiment, the first source setting can be via the control panel of the video playback device 200 and/or Or other control devices (such as the remote control or the aforementioned computer that plays the slide) are set up.

The aforementioned teaching application examples can also be applied to distance teaching. As shown in FIG. 1, the video playback system 100 can also include a user device 700. The user equipment 700 and the video playback device 200 are respectively located in two different places. The remote user can view the teaching information (including the lecturer teaching process and teaching materials, etc.) recorded by the video playback device 200 through the user device 700. Here, the user equipment 700 can be a terminal device with communication and media playing capabilities such as a personal computer, a notebook computer, a mobile phone, and/or a tablet computer. The dissimilarities include, but are not limited to, different cities, different buildings, the same building but different floors, the same floor, but different rooms.

As shown in FIG. 1, the video playback device 200 further includes a remote mixer 271, a remote encoder 273, and a communication unit 250. The remote mixer 271 is electrically connected to the storage unit 260. The remote encoder 273 is electrically connected between the remote mixer 271 and the communication unit 250. The communication unit 250 is used to connect the user equipment 700 with a signal. Therefore, the communication unit 250 can be a circuit supporting a wired network and/or a wireless network (such as IEEE 802.11a/b/g/n), but the embodiment of the present invention is not limited thereto, for example, can support a digital television channel. , satellite signals and / or the Public Switched Telephone Network (PSTN).

Similar to the foregoing local mixer 241, the remote mixer 271 can select one of the video signals of the video capturing device 300 and the sound signal of the sound capturing device 400 stored in the storage unit 260 according to a second source setting. Combining the second source and mixing the second source to generate a second Output signal. Herein, the foregoing teaching application example is described. In order to enable the remote user to perform distance learning as if he were in the field, the second source combination can be the video signal output by the camera (ie, the image taken by the camera). The video signal (ie, the image of the slide) output by the computer, the sound signal of the microphone, and the sound signal output by the computer (ie, the sound signal of the slide). That is to say, the second source combination further includes the video signal output by the camera compared to the first source combination. The remote mixer 271 mixes the signals to generate a second output signal. Then, the remote encoder 273 can perform video and voice encoding on the second output signal, and then transmit the signal to the user equipment 700 via the communication unit 250. The second output signal may include a video signal and/or an audio signal processed by a picture layout such as a picture of a picture, a multiple picture, or an external picture. For example, the video signal of the second output signal is processed through the layout of the mother-in-picture, so that the user can see that the image of the slide is located in the parent window, and the image of the lecturer and/or the whiteboard is located in the sub-window, but the embodiment of the present invention does not Limited or interchangeable.

In an embodiment, the second source setting may be from the user equipment 700, and the remote user determines the source to be viewed and listened to. However, the embodiment of the present invention is not limited thereto, and may be generated by the controller 230 or generated by the control panel and/or the external control device according to the foregoing generation manner of the first source setting.

In an embodiment, the controller 230 further includes a smart navigation unit (not shown). The smart navigation unit can be an application for comprehensively evaluating the content (eg, rating) of all sources, and when an event is detected, the first source setting and/or the second source setting can be updated accordingly. Adaptability Adjust the content presented by the local and/or remote. For example, the smart navigation unit detects the shooting content of the camera, and when the lecturer is writing the blackboard, the second source setting can be updated to make the user device 700 originally present the mother-in-picture (the white screen is the parent window, the slide screen). Change to a new picture of the child (the projection screen is the parent window, the white screen is the child window) or other layout screen; or temporarily remove the microphone in the first source combination and/or the second source combination Sound signals to avoid local and/or remote students being disturbed by the sound caused by the writing pad.

In summary, the storage unit 260 can store all the video signals and/or audio signals received by the video playback device 200. And, by using the first source setting and the second source setting, the video signal and/or the audio signal outputted by the recording site and the video signal and/or the audio signal output by the user equipment 700 can be freely selected from the stored media content. . Therefore, the individual recordings presented by the local end and the far end can be flexibly adjusted according to the requirements (for example, different types of divided pictures or different video sources or audio sources can be selected). Moreover, different remote users can personalize the content they view and/or how they are presented according to individual needs. Here, the content played on the local end and/or the far end may be an instant streaming play or a playback of a recorded file.

Although the above description is based on the teaching application example, the embodiment of the present invention is not limited to this application, and can be applied to multi-party video conferencing, interactive television, telemedicine, and the like.

2 is a circuit block diagram of a video playback system 100 in accordance with a second embodiment of the present invention.

As shown in FIG. 2, the difference is that the video playback system 100 of the second embodiment further includes the server 800 as compared with FIG. The server 800 includes a communication unit 850, a storage unit 860, a remote mixer 871, and a remote encoder 873. The storage unit 860 is similar to the storage unit 260 of the foregoing first embodiment for storing video signals and/or audio signals received by the video playback device 200. The remote mixer 871 is similar to the remote mixer 271 of the first embodiment. The second source combination can be selected from the video signal and the audio signal stored in the storage unit 860 according to the second source setting, and the second source combination is mixed. The two sources combine to generate a second output signal. The remote encoder 873 is similar to the remote encoder 273 of the first embodiment described above, the communication unit 850 is similar to the communication unit 250 of the foregoing first embodiment; the remote encoder 873 can perform video and speech encoding on the second output signal. Thereafter, it is transmitted to the user equipment 700 via the communication unit 850.

In an embodiment, the server 800 can be a servo host or a plurality of servo hosts. For example, in order to connect multiple remote users to the server 800 at the same time, for applications such as distance learning. Server 800 can dispatch different servo hosts to interface with different user devices 700.

Figure 3 is a circuit block diagram of a video playback apparatus 200 in accordance with a third embodiment of the present invention.

For the sake of clarity, FIG. 3 does not fully illustrate the internal components of the video playback device 200. In other words, the video playback apparatus 200 shown in Fig. 3 can be used in combination with the first or second embodiment described above. It should be noted that the signals output by the video capture device 300 and/or the sound capture device 400 may be analog signals or digital signals. Therefore, the video playback device 200 The video receiving end 213 for receiving the analog video signal Sav may also be included, and the video receiving end 215 for receiving the digital video signal Sdv may also be included. Similarly, the video playback device 200 may include a sound source receiving end 214 for receiving the analog sound signal Saa, and may also include a sound source receiving end 216 for receiving the digital sound signal Sda.

The video receiving end 213 of the analog video signal Sav is electrically connected to the analog digital converter 281 to convert the analog video signal Sav into a digital video signal. Similarly, the video receiving end 214 of the analog audio signal Saa is electrically connected to the analog digital converter 282 to convert the analog audio signal Saa into a digital audio signal.

The video receiving terminals 213, 214, 215, 216 are electrically coupled to the aforementioned controller 230 and local mixer 241 via bus bar 290, either directly or indirectly (via analog digital converters 281/282). Thereby, the controller 230 and the local mixer 241 can perform the foregoing processing of storing and/or mixing, encoding, and the like on the received signal.

In summary, the video playback device 200 and the system 100 thereof according to the present invention can flexibly adjust the local-end live presentation content and the remotely-presented recording content, respectively, according to the requirements. Moreover, different remote users can personalize the content they view and/or how they are presented according to individual needs.

While the present invention has been described above in the foregoing embodiments, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of patent protection shall be subject to the scope of the patent application attached to this specification. The standard is subject to change.

100‧‧‧Video playback system

200‧‧‧Video playback device

211‧‧‧Video Receiver

212‧‧‧Source receiving end

227‧‧‧Video output

228‧‧‧Source output

230‧‧‧ Controller

241‧‧‧Local Mixer

243‧‧‧Local encoder

250‧‧‧Communication unit

260‧‧‧ storage unit

271‧‧‧ Remote Mixer

273‧‧‧Remote encoder

300‧‧‧Video Capture Equipment

400‧‧‧Sound extraction equipment

500‧‧‧Video output device

600‧‧‧Sound output equipment

700‧‧‧User equipment

Claims (8)

A video playback device for selecting a source includes: at least one video receiving end connected to a video capturing device for obtaining a video signal; and at least one audio source receiving end connected to a sound capturing device for obtaining an audio signal; a storage unit electrically connected to the at least one video receiving end and the at least one audio source receiving end to store the video signal of the video capturing device and the sound signal of the sound capturing device; a local mixer, electrical Connecting the at least one video receiving end and the at least one sound source receiving end to select a first message from the video signal of the video capturing device and the sound signal of the sound capturing device according to a first source setting Combining the source and mixing the first source combination to generate a first output signal; and a remote mixer electrically connecting the storage unit to store the storage unit from the storage unit according to a second source setting The video signal of the video capture device is combined with the second source of the sound signal of the sound capture device, and the second source combination is mixed to generate a second output. number. The video playback device of claim 1, wherein the first output signal comprises: the video signal processed by the layout. The video playback device of claim 1, wherein the second output signal is transmitted to a user equipment, and the second source setting is from the user equipment. A video playback device for a selectable source includes: a plurality of video receiving terminals, each of which is connected to a video capturing device to obtain a video signal; and a storage unit electrically connected to the video receiving terminals to Storing the video signals of the video capture devices; a local mixer electrically connecting the video receiving terminals to select one of the video signals from the video capture devices according to a first source setting a source combination, and mixing the first source combination to generate a first output signal processed by the layout; and a remote mixer electrically connecting the storage unit to be configured according to a second source A second source combination is selected from the video signals of the video capture devices stored in the storage unit, and the second source combination is mixed to generate a second output signal processed by the layout. The video playback device of claim 4, wherein the second output signal is transmitted to a user equipment, and the second source setting is from the user equipment. A video playback system for a selectable source includes: a video playback device comprising: at least one video receiving end connected to a video capture device for obtaining a video signal; at least one audio source receiving end connected to a sound capture device Obtaining an audio signal; a local mixer electrically connecting the at least one video receiving end and the at least one audio source receiving end according to a first source setting, Selecting a first source combination from the video signal of each of the video capture devices and the audio signal of each of the sound capture devices, and mixing the first source combination to generate a first output signal; a remote mixer that generates a second output signal; and a server that is connected to the video playback device, the server includes: a storage unit that stores the video signal of the video capture device and the sound capture The audio signal of the device is electrically connected to the storage unit to capture the video signal and the sound from the video capture device stored in the storage unit according to a second source setting. A second source combination is selected from the audio signal of the device, and the second source combination is mixed to generate the second output signal. The video playing system of claim 6, further comprising: a user equipment, the signal is connected to the server, to send a second source setting to the server, the server is configured according to the second source, The video signal of the video capture device stored in the storage unit is combined with the second source of the sound signal of the sound capture device, and the second source combination is mixed to generate a second output signal. The video playback system of claim 7, wherein the video playback device further includes a smart navigation unit that evaluates the video signal and the audio signal, and when an event is detected, updates the first source setting and the first At least one of the two source settings.