Moving image transmission / reception system and moving image transmission / reception method

Abstract

A moving image transmission / reception system 1 comprises: a lossy compression encoder unit 121 that acquires a captured moving image captured by a camera 11 at a scene and performs lossy compression; a transmission control unit 123 that packetizes moving image compressed data subjected to the lossy compression; a communication terminal 13 that transmits the packetized moving image compressed data via a cellular network; a lossy compression decoder unit 211 that reproduces, on a cloud, the moving image compressed data received via the cellular network; and a lossless still image compression unit 22 that performs, on the cloud, lossless compression on a first reproduced moving image reproduced by the lossy compression decoder unit 211 and transmits broadcast data to a broadcast station side.

Description

Video transmitting / receiving system and video transmitting / receiving method

[0001] The present disclosure relates to a video transmitting / receiving system and a video transmitting / receiving method.

[0002] Patent Document 1 discloses a system for transmitting and receiving moving images for broadcast relay using a radio station for broadcasting business (FPU: Field Pick-up Unit).

[0003] Japanese Patent Application Laid-Open No. 2019-97092

[0004] In existing broadcast relays, dedicated equipment such as FPU is required, so preparation requires temporal and monetary costs.

[0005] The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a video transmitting / receiving system and a video transmitting / receiving method that can easily and inexpensively transmit and receive moving images related to broadcast relay.

[0006] The video transmitting / receiving system according to an aspect of the present disclosure includes: a lossy compression unit that acquires a captured moving image captured by a camera at a relay site and performs lossy compression on the captured moving image; a first transmitting unit that packetizes the moving image compressed data subjected to the lossy compression and transmits the packetized data via a cellular network; a first reproducing unit that reproduces the moving image compressed data received via the cellular network on a cloud; a lossless compression unit that performs lossless compression on a first reproduced moving image reproduced by the first reproducing unit on the cloud; and a second transmitting unit that transmits broadcasting data subjected to the lossless compression to a broadcasting station side.

[0007] Traditionally, video footage from live broadcasts has been transmitted using FPUs (Flash Processing Units), which required cumbersome setup, including the installation of FPUs and dedicated transmission / reception equipment. This resulted in significant time and financial costs. In contrast, the video transmission / reception system disclosed herein performs lossy compression (high compression) suitable for mobile communication on video footage captured at the live broadcast site. The compressed video data is then packetized and transmitted to the cloud via a cellular network. On the cloud, the compressed video data is played back, losslessly compressed, and converted into broadcast data, which is then transmitted to the broadcasting station. Thus, by performing lossy compression (high compression) suitable for mobile communication, it becomes possible to transmit compressed video data using existing cellular networks, allowing video footage captured by cameras to be transmitted without the need for dedicated equipment such as FPUs. Furthermore, because the compressed video data is losslessly compressed on the cloud to become broadcast data, it can be appropriately converted into broadcast data even when compressed video data is transmitted using a cellular network as described above. Thus, the video transmission and reception system of this disclosure makes it possible to appropriately transmit and receive video related to broadcast relay easily and inexpensively without using dedicated equipment such as FPUs, that is, without requiring time and money costs for preparation.

[0008] According to this disclosure, it is possible to easily and inexpensively send and receive video and images related to broadcast relay.

[0009] This is a schematic diagram showing the video transmission and reception system according to this embodiment. This diagram explains the configuration and functions of the relay site. This diagram explains the configuration and functions of the cloud. This is a flowchart showing the video transmission and reception process. This diagram shows the hardware configuration of each component included in the video transmission and reception system according to this embodiment.

[0010] Embodiments of the present invention will be described in detail below with reference to the attached drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant explanations will be omitted.

[0011] Figure 1 is a schematic diagram showing the video transmission and reception system 1 according to this embodiment. The video transmission and reception system 1 is a system that transmits video footage captured at the relay site to the broadcasting station via the cloud. The video transmission and reception system 1 is a system that transmits and receives various data (video data, control signals, etc.) via a cellular network. The video transmission and reception system 1 transmits and receives captured video footage without using a broadcasting radio station (FPU: Field Pick-up Unit) or dedicated equipment for transmitting and receiving radio signals.

[0012] As shown in Figure 1, the video transmission and reception system 1 comprises a camera 11, a video transmission application 12, and a communication terminal 13 at the relay site, a cloud-based configuration (details described later), and a decoder 31, a display 32, a remote control console 33, and a communication terminal 34 at the broadcasting station's sub-control room. In the video transmission and reception system 1, the video captured by the camera 11 at the relay site is subjected to lossy compression by the video transmission application 12, the compressed video data is packetized, and transmitted from the communication terminal 13 via the cellular network. The compressed video data is then decoded and played back on the cloud, and the broadcast data converted by lossless compression of the played-back video is transmitted to the existing broadcasting station system. At the broadcasting station, the broadcast data acquired by the decoder 31 is decoded and played back and displayed on the display 32, and remote control of the camera 11 from the user who views the displayed video is received by the remote control console 33. A control signal corresponding to the remote control is then transmitted from the communication terminal 34 to the relay site via the cellular network, and the camera 11 is controlled. The broadcasting station sub-control room is responsible for monitoring and controlling signals and managing various equipment within the broadcasting station, assisting the main control room. The broadcasting station configuration, connected by wire, may include remote production facilities, studios, etc. The following sections will provide detailed explanations of the configuration at the broadcasting site, the configuration on the cloud, and the configuration of the broadcasting station.

[0013] (Relay Site) Figure 2 is a diagram illustrating the configuration and functions of the relay site. As shown in Figure 2, the relay site is configured with a camera 11, a video transmission application 12, and a communication terminal 13. The camera 11 is, for example, a camera installed in a relay vehicle at the relay site. The camera 11 may also be capable of changing its shooting mode based on control signals from a communication terminal 34, which is part of the broadcasting station's configuration, i.e., control signals corresponding to remote operation by the user.

[0014] The video transmission application 12 may be a function installed on a PC (not shown) or a communication terminal 13. The video transmission application 12 includes a lossy compression encoder unit 121, a buffer / queue control unit 122, and a transmission control unit 123. By coordinating with each other, the video data acquired by the camera 11 is converted into a format that can be transmitted efficiently and safely over a cellular network, enabling real-time or near-real-time transmission.

[0015] The lossy compression encoder unit 121 (lossy compression unit) acquires video footage captured by the camera 11 at the broadcast site and performs lossy compression to achieve a high compression ratio. The compression method may include, for example, H.265 / HEVC, H.264 / AVC, MPEG-4, MPEG-2, AV1, VP10, VP9, ​​etc. The lossy compression encoder unit 121 may, for example, take a series of images (frames) acquired from the camera 11 as input and perform processing to reduce redundancy between frames or compression processing utilizing the correlation between pixels. The lossy compressed video data is input to the subsequent buffer / queue control unit 122.

[0016] The buffer / queue control unit 122 temporarily stores video compressed data that has undergone lossy compression, and manages packetization timing and data order suitable for transmission over a cellular network. As part of buffer management processing, the buffer / queue control unit 122 secures a temporary data storage area and makes adjustments considering network congestion and packet loss during transmission. As part of queue control processing, the buffer / queue control unit 122 manages the transmission order and optimizes the transmission timing of each packet. The communication protocol may be UDP (User Datagram Protocol), which enables low-latency transmission and is suitable for video transmission where real-time performance is required, or TCP (Transmission Control Protocol), which provides highly reliable transmission. These communication protocols may be used selectively depending on the network conditions and application requirements.

[0017] The transmission control unit 123 packets the compressed video data supplied from the buffer / queue control unit 122 based on RTP (Real-time Transport Protocol) and makes it ready for transmission over the cellular network. The transmission control unit 123 functions as the "first transmission unit" together with the communication terminal 13. The transmission control unit 123 divides the compressed video data into fixed time units and encapsulates them in RTP packets. The transmission control unit 123 assigns a timestamp and sequence number to each packet to enable synchronous playback and packet order restoration on the receiving side. The transmission control unit 123 may apply extended protocols as appropriate for security and improved transmission quality. The transmission control unit 123 may adopt extension protocols such as RTPS (Real-time Transport Protocol Secure), which enhances data security by adding encryption and authentication functions to RTP communications; SRTP (Secure Real-time Transport Protocol), which provides secure video transmission without compromising real-time performance by achieving lightweight encryption; and RTSPS (Real-Time Streaming Protocol Secure), a secure version of the streaming control protocol RTSP that enables encryption and authentication of control signals. By adopting these protocols, the reliability and security of video transmission are ensured even in public network environments such as cellular networks.

[0018] The communication terminal 13 is, for example, a terminal capable of 5G communication, and transmits the packetized video compressed data, which has been processed by the transmission control unit 123, over the cellular network. The packetized video compressed data may include an IP header, a UDP / TCP header, an RTP header, and RTP data (video), as shown in Figure 2.

[0019] (Cloud) Figure 3 is a diagram illustrating the configuration and functions on the cloud. As shown in Figure 3, the cloud configuration includes a video transmission application 21 and a lossless still image compression unit 22. The video transmission application 21 includes a lossy compression decoder unit 211, a buffer control unit 212, and a transmission control unit 213.

[0020] The lossy compression decoder unit 211 (first playback unit) plays back the video compressed data received via the cellular network on the cloud. The lossy compression decoder unit 211 converts (decodes) the received video compressed data into playable video data and plays it back. The conversion method may be, for example, H.265 / HEVC, H.264 / AVC, MPEG-4, MPEG-2, AV1, VP10, VP9, ​​etc.

[0021] The buffer control unit 212 has the function of temporarily storing and managing video compressed data received via the cellular network and video data converted by the lossy compression decoder unit 211. The communication protocol may be UDP, which enables low-latency transmission and is suitable for video transmission where real-time performance is required, or TCP, which provides highly reliable transmission.

[0022] The transmission control unit 213 performs transmission control based on RTP for the video data supplied from the buffer control unit 212. The transmission control unit 213 may also adopt extension protocols such as RTPS, SRTP, or RTSPS.

[0023] The lossless still image compression unit 22 (lossless compression unit) performs lossless compression of the first playback video played back by the lossy compression decoder unit 211 on the cloud. The lossless still image compression unit 22 performs lossless compression of the first playback video using, for example, the ST2110 standard to obtain broadcast data. ST2110 is an IP-based professional media transmission standard defined by SMPTE. ST2110 enables separate transmission, where video, audio, and ancillary data are transmitted as independent streams. In addition, ST2110 assigns a timestamp to each video frame, guaranteeing synchronization between multiple transmission streams. The lossless still image compression unit 22 also functions as a second transmission unit that transmits the losslessly compressed broadcast data (ST2110 data) to the broadcasting station.

[0024] (Broadcasting Station) Returning to Figure 1, the sub-control room of the broadcasting station is equipped with a decoder 31, a display 32, a remote control console 33, and a communication terminal 34.

[0025] The decoder 31 (second playback unit) plays back the received broadcast data. The decoder 31 converts (decodes) the broadcast data into playable data and plays it back. The conversion may be performed using, for example, the ST2110 standard. The display 32 (display unit) displays the second playback video played back by the decoder 31.

[0026] A user within the broadcasting station (a user who wants to control camera 11) operates the remote control console 33 based on the second playback video displayed on the display 32. The video played and displayed for the remote control of camera 11 may be broadcast data (second playback video) or lossy compressed data. The remote control console 33 (input unit) receives remote control requests for camera 11 from the user who has viewed the second playback video displayed on the display 32, and outputs a control signal corresponding to the remote control to the communication terminal 34.

[0027] The communication terminal 34 (third transmitting unit) transmits control signals corresponding to the remote control received by the remote control console 33 to the relay site via the cellular network. These control signals are transmitted to the camera 11 at the relay site via the cellular network. The camera 11 then changes its shooting mode based on the control signals.

[0028] Next, with reference to Figure 4, the video transmission and reception process of the video transmission method performed by the video transmission and reception system 1 will be described. Figure 4 is a flowchart of the video transmission and reception process.

[0029] As shown in Figure 4, first, the video footage captured by the camera 11 at the broadcast site is acquired by the lossy compression encoder unit 121 (step S1). Subsequently, the lossy compression encoder unit 121 performs lossy compression on the captured video footage (step S2).

[0030] Next, the transmission control unit 123 packets the compressed video data, and the communication terminal 13 transmits the packetized compressed video data (step S3). Process A1 in steps S1 to S3 is performed at the relay site.

[0031] Next, the video compression data is received by the lossy compression decoder unit 211 on the cloud (step S4), and the lossy compression data is converted (decoded) and played back (step S5).

[0032] Next, the lossless still image compression unit 22 performs lossless compression on the first playback video played back by the lossy compression decoder unit 211 (step S6), and the losslessly compressed broadcast data (ST2110 data) is transmitted to the broadcasting station (step S7). Process A2 in steps S4 to S7 is performed on the cloud.

[0033] Next, the broadcast station's decoder 31 performs conversion (decoding) and playback of the broadcast data, and the second playback image reproduced by the decoder 31 is displayed on the display 32 (step S8). Then, the user remotely controls the camera based on the second playback image displayed on the display 32, and a control signal corresponding to the remote control is transmitted from the communication terminal 34 to the camera 11 via the cellular network (step S9). Process A3 in steps S8 and S9 is performed by the broadcast station.

[0034] Finally, the camera 11 is operated according to the control signal (step S10). Process A4 in step S10 is a process that is carried out at the broadcast site.

[0035] Next, the operation and effects of the video transmission and reception system 1 according to this embodiment will be described.

[0036] The video transmission and reception system 1 includes a lossy compression encoder unit 121 that acquires video footage captured by a camera 11 at the relay site and performs lossy compression, a transmission control unit 123 that packets the lossily compressed video data, a communication terminal 13 that transmits the packetized video data via a cellular network, a lossy compression decoder unit 211 that plays back the video data received via the cellular network on the cloud, and a lossless still image compression unit 22 that performs lossless compression on the first playback video played back by the lossy compression decoder unit 211 on the cloud and transmits the broadcast data to the broadcasting station.

[0037] Conventionally, video footage from live broadcast sites has been transmitted using an FPU (Flash Processing Unit), which required complicated preparations such as the installation of the FPU and dedicated equipment for transmission and reception. As a result, the time and financial costs required for preparation were substantial. In this regard, the video transmission and reception system 1 disclosed herein performs lossy compression (high compression) suitable for mobile communication on video footage captured at the live broadcast site, and the compressed video data is packetized and transmitted to the cloud via the cellular network. The compressed video data is then played back on the cloud, lossless compression is performed to convert it into broadcast data, and this broadcast data is transmitted to the broadcasting station. In this way, lossy compression (high compression) suitable for mobile communication is performed, enabling the transmission of compressed video data using existing cellular networks, and allowing video footage captured by the camera 11 to be transmitted without the use of dedicated equipment such as an FPU. Furthermore, because the compressed video data is losslessly compressed on the cloud to become broadcast data, it can be appropriately converted into broadcast data even when compressed video data is transmitted using the cellular network as described above. Thus, according to the video transmission and reception system 1 of this embodiment, video images related to broadcast relay can be appropriately transmitted and received easily and inexpensively without using dedicated equipment such as an FPU, that is, without requiring time and money costs for preparation.

[0038] The video transmission and reception system 1 may further include a decoder 31 that acquires and plays back broadcast data on the broadcasting station side, and a display 32 that displays the second playback video played back by the decoder 31. With such a configuration, the broadcasting station side can visually confirm the second playback video that has been converted and played back.

[0039] The video transmission and reception system 1 may further include a remote control console 33 that receives remote commands to the camera 11 from a user who has viewed the second playback video displayed on the display 32, and a communication terminal 34 that transmits control signals corresponding to the remote commands received by the remote control console 33 to the broadcast site via a cellular network. With such a configuration, it becomes possible to remotely control the camera 11 from the broadcasting station without having to dispatch an operator to the broadcast site.

[0040] The block diagram used in the description of the above embodiment shows functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the one or more devices with software.

[0041] Functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. In all cases, as mentioned above, the method of implementation is not particularly limited.

[0042] For example, each component constituting the moving image transmission / reception system 1 according to an embodiment of the present disclosure may function as a computer that executes the processing of the moving image transmission / reception method of the present disclosure. FIG. 5 is a diagram showing the hardware configuration of each component included in the moving image transmission / reception system according to the present embodiment. Each of the above-described components may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. The components only need to be configured as a computer device including at least one processor such as a CPU or GPU, may be configured as a computer device including a plurality of processors, or may be configured to include a plurality of computer devices.

[0043] In the following description, the term "apparatus" may be read as a circuit, a device, a unit, or the like. The hardware configuration of the RAG system 20 may be configured to include one or more of each apparatus shown in the figure, or may be configured not to include some of the apparatuses.

[0044] Each function in the moving image transmission / reception system 1 is implemented by loading predetermined software (program) onto hardware such as the processor 1001 and the memory 1002, causing the processor 1001 to perform operations, controlling communication by the communication device 1004, and controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0045] For example, the processor 1001 operates an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control unit, an arithmetic unit, a register, and the like. For example, each functional unit described above may be implemented by the processor 1001.

[0046] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes accordingly. The program used is one that causes the computer to execute at least a part of the operations described in the above embodiment. For example, each of the above-mentioned functional units may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be implemented similarly. The above-mentioned various processes have been described as being executed by one processor 1001, but they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may also be transmitted from a network via a telecommunications line.

[0047] The memory 1002 is a computer-readable recording medium and may consist of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The memory 1002 may also be called a register, cache, main memory, etc. The memory 1002 can store executable programs (program code), software modules, etc., for implementing the video transmission and reception method according to one embodiment of the present disclosure.

[0048] The storage 1003 is a computer-readable recording medium, and may be constituted by at least one of, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disc, a digital versatile disc, a Blu-ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like. The storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, a database, a server or other suitable medium including at least one of the memory 1002 and the storage 1003.

[0049] The communication device 1004 is hardware (a transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD), for example. For example, each of the above-described functional units may be implemented by the communication device 1004.

[0050] The input device 1005 is an input device that receives input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like). The output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, an LED lamp, and the like). Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

[0051] Furthermore, each device, such as the processor 1001 and memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0052] Furthermore, the video transmission and reception system 1 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0053] Information notification is not limited to the embodiments described herein and may be carried out by other means. For example, information notification may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or combinations thereof. RRC signaling may also be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0054] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described in this disclosure may be reordered, provided they do not contradict each other. For example, the methods described in this disclosure present various step elements using exemplary order and are not limited to the specific order presented.

[0055] Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0056] The determination may be made by a value represented by one bit (0 or 1), by a boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0057] Each aspect / embodiment described in this disclosure may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0058] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Accordingly, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way.

[0059] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0060] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technologies (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0061] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0062] In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0063] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0064] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0065] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0066] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate term.

[0067] As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, or inquiring (e.g., searching in a table, database, or other data structure), or ascertaining. “Determining” may also include, for example, receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, or accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0068] The terms “connected,” “coupled,” or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be reinterpreted as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0069] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0070] Any reference to elements using designations such as “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, references to first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

[0071] Where the terms “include,” “including,” and their variations are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to be exclusive OR.

[0072] In this disclosure, if articles are added by translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0073] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0074] 1...Motion image transmission and reception system, 11...Camera, 13...Communication terminal, 22...Lossless still image compression unit (lossless compression unit, second transmission unit), 31...Decoder (second playback unit), 32...Display (display unit), 33...Remote control console (input unit), 34...Communication terminal (third transmission unit), 121...Lossy compression encoder unit (lossy compression unit), 123...Transmission control unit, 211...Lossy compression decoder unit (first playback unit).

Claims

1. A video transmission and reception system comprising: a lossy compression unit that acquires video footage captured by a camera at a broadcast site and performs lossy compression; a first transmission unit that packets the lossy compressed video data and transmits it via a cellular network; a first playback unit that plays back the video compressed data received via the cellular network on the cloud; a lossless compression unit that performs lossless compression of the first playback video played back by the first playback unit on the cloud; and a second transmission unit that transmits the losslessly compressed broadcast data to the broadcasting station.

2. The video transmission and reception system according to claim 1, further comprising: a second playback unit that acquires and plays back the broadcast data at the broadcasting station; and a display unit that displays the second playback video played back by the second playback unit.

3. The video transmission and reception system according to claim 2, further comprising: an input unit that receives remote control of the camera from a user who has viewed the second playback video displayed on the display unit; and a third transmission unit that transmits a control signal corresponding to the remote control received by the input unit to the relay site via a cellular network.

4. A video transmission method performed by a video transmission and reception system, comprising: acquiring video footage captured by a camera at a relay site and performing lossy compression; packetizing the video compressed data subjected to the lossy compression and transmitting it via a cellular network; playing back the video compressed data received via the cellular network on the cloud; performing lossless compression on the first played-back video played back on the cloud; and transmitting the lossless compressed broadcast data to the broadcasting station.

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