IP BASED VIDEO TRANSMISSION DEVICE AND BROADCAST SYSTEM

Abstract

A broadcasting system of the present invention includes a video transmission device that receives uncompressed video signals to generate IP packet streams having uncompressed video data, and compresses uncompressed signals to IP packet streams having compressed video data, a video delivering system that delivers IP packet streams having uncompressed video data for high quality video, and delivers IP packet streams having compressed video data for monitor to a monitoring system, and the monitoring system that selects and displays IP packet streams to be monitored among the IP packet streams received from the video transmission device.

Claims

1.-6. (canceled)

7. A method implemented by a broadcasting system comprising: receiving uncompressed video signals; IP-packetizing the uncompressed video signals to generate first IP packet streams having uncompressed videos; compress the uncompressed video signals to generate compressed video data; IP-packetizing the compressed video data to generate second IP packet streams having compressed videos; transmitting the first IP packet streams to a video transmitter; decoding the second IP packet streams to generate first video signals; and displaying the first video signals on a monitor.

8. The method according to claim 7 further comprising: receiving from the video transmitter, third IP packet streams having compressed videos corresponding to the first IP packet streams; and decoding the third IP packet streams to generate second video signals; and displaying the second video signals on the monitor.

9. A method implemented by a broadcasting system comprising: receiving first IP packet streams having uncompressed video signals; converting the first IP packet streams into video signals: compress the video signals to generate second IP packet streams having compressed videos; transmitting the first IP packet streams to a video transmitter; decoding the second IP packet streams to generate first video signals; and displaying the first video signals on a monitor.

10. The method according to claim 9 further comprising: receiving from the video transmitter, third IP packet streams having compressed videos corresponding to the first IP packet streams; and decoding the third IP packet streams to generate second video signals; and displaying the second video signals on the monitor.

11. A broadcasting system comprising a switch, a first video transmitter, a decoder and a monitor, wherein the first video transmitter is configured to: receive uncompressed video signals; IP-packetize the uncompressed video signals to generate first IP packet streams having uncompressed videos and transmit the first IP packet streams to the switch; compress the uncompressed video signals to generate compressed video data; and IP-packetize the compressed video data to generate second IP packet streams having compressed videos and transmit the second IP packet streams to the switch, wherein the switch is configured to: transmit to a second video transmitter, the first IP packet streams transmitted by the first video transmitter; and transmit to the decoder, the second IP packet streams transmitted by the first video transmitter, and wherein the decoder is configured to: decode the second IP packet streams transmitted by the switch to generate to a first video signals; and display the first video signals on the monitor.

12. The broadcasting system according to claim 11, wherein the switch is further configured to receive from the second video transmitter, third IP packet streams having compressed videos corresponding to the first IP packet streams, and transmit the third IP packet streams to the decoder, and wherein the decoder is further configured to decode the third IP packet streams transmitted by the switch to generate second video signals, and display the second video signals on the monitor.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0022] FIG. 1 is a block diagram showing a broadcasting system using coaxial cables according to the prior art;

[0023] FIG. 2 is a block diagram showing a broadcast system in which a monitoring system according to the prior art is used for an IP-based video delivering system;

[0024] FIG. 3 is a block diagram showing an IP based broadcasting system using a monitoring system according to one embodiment of the present invention;

[0025] FIG. 4 is a diagram showing a packet format specified in the SMPTE2022-6;

[0026] FIG. 5 is a diagram showing a packet format specified in the SMPTE2022-2;

[0027] FIG. 6 is a block diagram showing an exemplary structure of a video transmitter used in the monitoring system illustrated in FIG. 3; and

[0028] FIG. 7 is a block diagram showing an exemplary structure of a video transmitter used in the monitoring system illustrated in FIG. 3.

DETAILED DESCRIPTION OF INVENTION

[0029] Hereinafter, embodiments of the present invention are described in detail in reference to the attached drawings.

[0030] FIG. 3 is a block diagram showing an exemplary structure of an IP based broadcasting system using a monitoring system according to one embodiment of the present invention. The broadcast system 3 illustrated in FIG. 3 includes an IP-based video delivering system 31, an external IP network 301, a recording studio 302, an editing system 303, a sending system 304, an archiving system 305, an editing system 306, and an IP-based monitoring system 32. The external IP network 301, the recording studio 302 and the editing system 303 output IP packet streams to the IP-based video delivering system 31. The sending system 304, the archiving system 305 and the editing system 306 receive the IP packet streams from the IP-based video delivering system 31. The IP-based monitoring system 32 receives IP packet streams from the IP-based video delivering system 31.

[0031] The IP-based video delivering system 31 includes an L2/L3 switch 310 configured to perform switching on an IP layer or a MAC sublayer, a depacketizer 312 configured to receive from the external IP network 301 and convert into HD-SDI signals 3121, IP packet streams 3012 compliant with the SMPTE2022-6, and an encoder 311 configured to encode the HD-SDI signals 3121 outputted from the depacketizer 312 according to the JPEG2000 scheme and output IP packet streams having compressed videos compliant with the SMPTE2022-2 to a 1 GbE 3111. With respect to a device having functions comprised in the depacketizer 312 and functions comprised in the encoder 311, a plurality of devices have been already commercialized as of 2013, such as the MD8000 from MEDIA LINKS Co., Ltd.

[0032] The SMPTE2022-2 corresponds to specifications for IP-packetizing streams having compressed videos in MPEG-TS signals. FIG. 4 shows a packet format specified in the SMPTE2022-6. Uncompressed videos are transmitted in a field Media Payload specified for an IP packet illustrated in FIG. 4. The Media Payload is a field with fixed 1376 length octets. Further, FIG. 5 shows a packet format specified in the SMPTE2022-2. Compressed videos are transmitted in a field MPEG2-TS Payload specified for an IP packet illustrated in FIG. 5. This field can contain up to seven MPEG2-TS signals.

[0033] With reference to FIG. 3 again, the recording studio 302 includes a video transmitter 3022 configured to generate from HD-SDI signals 3020 and transmit to a 10 GbE 3021, IP packet streams 3023 having uncompressed videos compliant with the MPTE2022-6 and IP packet streams 3024 having compressed video compliant with the MPTE2022-2. The editing system 303 also includes a video transmitter 3032 configured to generate from HD-SDI signals 3030 and transmit to a 10 GbE 3031, IP packet streams 3033 having uncompressed videos and IP packet streams 3034 having compressed videos.

[0034] The IP-based monitoring system 32 includes an L2/L3 switch 320 configured receive and select the IP packet streams inputted from the L2/L3 switch 310, decoders 3221 to 3228 each configured to decode and convert into HD-SDI signals, video data in the IP packet streams, that are outputted from the L2/L3 switch 320, having compressed videos compliant with the MPTE2022-2, and monitors 321 to 328 each configured to display the video signals outputted from the decoders 3221 to 3228.

[0035] The sending system 304 includes a video transmitter 3042 having a depacketizing function for receiving from a 10 GbE 3101 and converting into HD-SDI signals 3041, IP packet streams 3123 compliant with the SMPTE2022-6, and a compressing function for generating from the converted HD-SDI signals 3041 and transmitting to the 10 GbE 3101, IP packet streams 3126 having compressed videos compliant with the MPTE2022-2. The archiving system 305 includes a video transmitter 3052 having a depacketizing function for receiving from a 10 GbE 3102 and converting into HD-SDI signals 3051, IP packet streams 3124 compliant with the SMPTE2022-6, and a compressing function for generating from the converted HD-SDI signals 3051 and transmitting to the 10 GbE 3102, IP packet streams 3127 having compressed videos compliant with the MPTE2022-2.

[0036] The editing system 306 includes a video transmitter 3062 having a depacketizing function for receiving from a 10 GbE 3103 and converting into HD-SDI signals 3306, IP packet streams 3125 compliant with the SMPTE2022-6, and a compressing function for generating from the converted HD-SDI signals 3061 and transmitting to the 10 GbE 3103, IP packet streams 3128 having compressed videos compliant with the MPTE2022-2.

[0037] The black-shaded squares adjacent to the arrows represent IP packet streams having uncompressed videos, and the white-shaded squares adjacent to the arrows represent IP packet streams having compressed videos in FIG. 3.

[0038] In the IP-based video delivering system 31, the IP packet streams 3012 having uncompressed videos inputted from the external IP network 301 via the 10 GbE 3011 are inputted into the L2/L3 switch 310 and the depacketizer 312 through an optical splitter 313. The depacketizer 312 converts the inputted IP packet streams 3012 having uncompressed videos into the HD-SDI signals 3121 and transmits the converted HD-SDI signals to the encoder 311. The encoder 311 compresses videos in the HD-SDI signals 3121 to 100 Mbps signals according to the JPEG2000 encoding scheme to generate and output to the L2/L3 switch 310 via the 1 GbE 3111, IP packet streams 3122 compliant with the SMPTE2022-2. That is, the L2/L3 switch 310 receives both of the IP packet streams 3012 having uncompressed videos and the IP packet streams 3122 having compressed videos.

[0039] The video transmitter 3022 in the recording studio 302 converts the HD-SDI signals 3020 into the IP packet streams 3023 having uncompressed videos compliant with the SMPTE2022-6, and transmits the converted IP packet streams to the L2/L3 switch 310 via the 10 GbE 3021. In conjunction with that, the video transmitter 3022 compresses videos in the HD-SDI signals 3020 to 100 Mbps signals according to the JPEG2000 encoding scheme, converts the compressed signals into the IP packet streams 3024 having compressed videos compliant with the SMPTE2022-2, and transmits the converted IP packet streams the to the L2/L3 switch 310 via the 1 GbE 3021. That is, in the same way as the case of receiving the videos from the external IP network, the L2/L3 switch 310 receives both of the IP packet streams 3023 having uncompressed videos and the IP packet streams 3024 having compressed signals with 100 Mbps that are compressed from the uncompressed videos.

[0040] The video transmitter 3032 in the editing system 303 also converts the HD-SDI signals 3030 into the IP packet streams 3033 having uncompressed videos compliant with the SMPTE2022-6, and transmits the converted IP packet streams to the L2/L3 switch 310 via the 10 GbE 3031. In conjunction with that, the video transmitter 3022 compresses videos in the HD-SDI signals 3030 to 100 Mbps signals according to the JPEG2000 encoding scheme, converts the compressed signals into the IP packet streams 3034 having compressed videos compliant with the SMPTE2022-2, and transmits the converted IP packet streams the to the L2/L3 switch 310 via the 1 GbE 3032. That is, in the same way as the case of receiving the videos from the external IP network 301, the L2/L3 switch 310 receives from the recording studio 302 and the editing system 303, both of the IP packet streams 3033 having uncompressed videos and the IP packet streams 3044 having compressed signals with 100 Mbps that are compressed from the uncompressed videos.

[0041] Respective IP packet streams having uncompressed videos and respective IP packet streams having compressed videos have different destination IP addresses, different destination MAC addresses, or different VLAN IDs. Even in the case that the destination IP addresses and the destination MAC addresses are set with multicast addresses not unicast addresses, respective IP packet streams are set with different addresses or different VLAN IDs.

[0042] The L2/L3 switch 310 identifies the received destination IP addresses, the received destination MAC addresses, or the received VLAN IDs, and selects any of the sending system 304, the archiving system 305, the editing system 306 and the IP-based monitoring system 32 to output the IP packet streams to the selected one. The L2/L3 switch 310 selects the IP packet streams 3123 to 3125 having uncompressed videos for the sending system 304, the archiving system 305, and the editing system 306 respectively, and outputs the selected IP packet streams to the 10 GbE 3101 to 3103 corresponding to the respective systems. Further, the L2/L3 switch 310 selects a series of IP packet streams 3129, and outputs the selected series of IP packet streams to the 10 GbE 3104 corresponding to the IP-based monitoring system 32.

[0043] The video transmitter 3042 converts the IP packet streams 3123 having uncompressed videos transmitted to the sending system 304 into the HD-SDI signals 3041 for use in the sending system 304. The video transmitter 3042 also compresses videos in the converted HD-SDI signals 3041 to 100 Mbps signals according to the JPEG2000 encoding scheme for videos to be monitored in the sending system 304, converts the compressed signals into the IP packet streams 3126 having compressed videos compliant with the SMPTE2022-2, and re-transmits the converted IP packet streams to the L2/L3 switch 310 via the 10 GbE 3101. The IP packet streams 3126 having compressed videos re-transmitted to the L2/L3 switch 310 are outputted to the IP-based monitoring system 32 as apart of the series of IP packet streams 3129 having compressed videos.

[0044] The video transmitter 3052 also converts the IP packet streams 3124 having uncompressed videos transmitted to the archiving system 305 into the HD-SDI signals 3051 for use in the archiving system 305. The video transmitter 3052 also compresses videos in the converted HD-SDI signals 3051 to 100 Mbps signals according to the JPEG2000 encoding scheme for videos to be monitored in the archiving system 305, converts the compressed signals into the IP packet streams 3127 having compressed videos compliant with the SMPTE2022-2, and re-transmits the converted IP packet streams to the L2/L3 switch 310 via the 10 GbE 3102. The IP packet streams 3127 having compressed videos re-transmitted to the L2/L3 switch 310 are outputted to the IP-based monitoring system 32 as a part of the series of IP packet streams 3129 having compressed videos.

[0045] The video transmitter 3062 also converts the IP packet streams 3125 having uncompressed videos transmitted to the editing system 306 into the HD-SDI signals 3062 for use in the editing system 306. The video transmitter 3062 also compresses videos in the converted HD-SDI signals 3061 to 100 Mbps signals according to the JPEG2000 encoding scheme for videos to be monitored in the editing system 306, converts the compressed signals into the IP packet streams 3128 having compressed videos compliant with the SMPTE2022-2, and re-transmits the converted IP packet streams to the L2/L3 switch 310 via the 10 GbE 3103. The IP packet streams 3128 having compressed videos re-transmitted to the L2/L3 switch 310 are outputted to the IP-based monitoring system 32 as apart of the series of IP packet streams 3129 of compressed videos.

[0046] That is, the system illustrated in FIG. 3 delivers to the sending system 304, the archiving system 305 and the editing system 306, videos with image quality equivalent to those delivered in the system illustrated in FIG. 2, and delivers compressed videos with lower bit rate to the IP-based monitoring system 32.

[0047] In the IP-based monitoring system 32, the L2/L3 switch 320 selects IP packets having videos to be monitored on the monitors 321 to 328 among the IP packet streams having compressed videos inputted from the 10 GbE 3104, and outputs the selected IP packets to the 1 GbEs 3201 to 3208 respectively. The decoders 3221 to 3228 decode according to the JPEG2000 encoding scheme and convert into the HD-SDI signals 3231 to 3238 respectively, the IP packet streams outputted to the 1GbEs 3201 to 3208 by the L2/L3 switch 320, and the monitors 321 to 328 display the converted HD-SDI signals respectively. With respect to a device having functions comprised in the decoders 3221 to 3228, a plurality of devices have been already commercialized as of 2013, such as the MD8000 from MEDIA LINKS Co., Ltd.

[0048] As described above, the broadcasting system illustrated in FIG. 3 delivers uncompressed videos to systems requiring videos with high quality, and delivers compressed videos with low bit rate to the monitoring system, thereby achieving a system using inexpensive GbEs (1 GbE used in the present embodiment). Therefore, costs required for the L2/L3 switch used, cabling costs and wiring costs in the monitoring system can be reduced comparing to the system illustrated in FIG. 2.

[0049] FIG. 6 is a block diagram showing an exemplary structure of the video transmitter 3022 (referred to as video transmitter 61 in FIG. 6) used in the monitoring system illustrated in FIG. 3. The video transmitter 61 illustrated in FIG. 6 includes an HD-SDI interface 611 configured to receive HD-SDI signals 60, a JPEG2000 encoder 612 configured to encode the HD-SDI signals 60, and an IP packet generator and transmitter 63. The IP packet generator and transmitter 63 includes an uncompressed IP packet generator 631 configured to generate IP packet streams having uncompressed videos compliant with the SMPTE2022-6, a JPEG2000 compressed IP packet generator 632 configured to generate IP packet streams having JPEG2000 compressed videos compliant with the SMPTE2022-2, a 10 GbE MAC control circuit 633 configured to control a 10 GbE MAC sublayer, a 10 GbE PHY control circuit 634 configured to control a PHY layer, and an SFP+optical module 635 connected to a 10 GbE 62.

[0050] The HD-SDI interface 611 receives the HD-SDI signals 60 inputted into the video transmitter 61. Data received by the HD-SDI interface 611 is transmitted to the uncompressed IP packet generator 631 and the JPEG2000 encoder 612. The uncompressed IP packet generator 631 IP-packetizes data from the HD-SDI interface 611 to generate IP packet streams in a format compliant with the SMPTE2022-6 and illustrated in FIG. 4, and transmits the generated IP packet streams to the 10 GbE MAC control circuit 633. The JPEG2000 encoder 612 compresses video data from the HD-SDI interface 611 according to the JPEG2000 encoding scheme, and transmits streams having the compressed videos to the JPEG2000 compressed IP packet generator 632. The JPEG2000 compressed IP packet generator 632 IP-packetizes streams having compressed videos from the JPEG2000 encoder 612 to generate IP packet stream in a format compliant with the SMPTE2022-2 and illustrated in FIG. 5, and transmits the generated IP packet streams to the 10 GbE MAC control circuit 633. The 10 GbE MAC control circuit 633 transmits to the 10 GbE 62 via the 10 GbE PHY control circuit 634 and the SFP+optical module 635, the IP packet streams received from the uncompressed IP packet generator 631 and the JPEG2000 compressed IP packet generator 632.

[0051] As described above, according to the video transmitter 61 of embodiment illustrated in FIG. 6, the IP packet streams having uncompressed videos compliant with the SMPTE2022-6 and the IP packet streams having compressed videos compliant with the SMPTE2022-2 can be generated from the HD-SDI signals in parallel, and can be transmitted to the 10 GbEs. That is, it can achieve the video transmitters 3022 and 3032 illustrated in FIG. 3.

[0052] FIG. 7 is a block diagram showing an exemplary structure of the video transmitters 3042, 3052 and 3062 (referred to as video transmitter 71 in FIG. 7) used in the monitoring system illustrated in FIG. 3. The video transmitter 71 illustrated in FIG. 7 includes an SFP+optical module 711 connected to a 10 GbE 70, a 10 GbE PHY control circuit 712 connected to the SFP+optical module 711, and a 10 GbE MAC control circuit 713 connected to the 10 GbE PHY control circuit 712. The video transmitter 71 also includes an uncompressed IP packet decapsulator 714 connected to the 10 GbE MAC control circuit 713, and an HD-SDI interface 715 connected to the uncompressed IP packet decapsulator 714. The video transmitter 71 further includes a JPEG2000 encoder 716 connected to the uncompressed IP packet decapsulator 714, and a JPEG2000 compressed IP packet generator 717 connected between the JPEG2000 encoder 716 and the 10 GbE MAC control circuit 713.

[0053] The SFP+optical module 711 receives IP packet streams having uncompressed videos inputted into the video transmitter 71. The IP packet streams having uncompressed videos received by the SFP+optical module 711 are transmitted to the uncompressed IP packet decapsulator 714 via the 10 GbE PHY control circuit 712 and the 10 GbE MAC control circuit 713. The uncompressed IP packet decapsulator 714 depacketizes the IP packet streams having uncompressed videos to convert the depacketized IP packet streams into the HD-SDI signals. The HD-SDI signals depacketized by the uncompressed IP packet decapsulator 714 are outputted as an HD-SDI signal to outside the system via the HD-SDI interface 715.

[0054] The video transmitter 71 can also generate videos to be monitored used in facilities such as the sending system, archiving system and editing system in which the video transmitters 71 are placed respectively. The HD-SDI signals outputted from the uncompressed IP packet decapsulator 714 are outputted to the JPEG2000 encoder 716 for being monitored. The JPEG2000 encoder 716 compresses video data from the uncompressed IP packet decapsulator 714 according to the JPEG2000 encoding scheme, and transmits streams having compressed videos to the JPEG2000 compressed IP packet generator 717. The JPEG2000 compressed IP packet generator 717 IP-packetizes streams having compressed videos from the JPEG2000 encoder 716 to generate IP packet streams in a format compliant with the SMPTE2022-2 and illustrated in FIG. 5, and transmits the generated IP packet streams to the 10 GbE MAC control circuit 713. The 10 GbE MAC control circuit 713 transmits to the 10 GbE 70 via the 10 GbE PHY control circuit 712 and the SFP+optical module 711, the IP packet streams received from the JPEG2000 compressed IP packet generator 717.

[0055] As described above, according to the video transmitter 71 of embodiment illustrated in FIG. 7, the IP packet streams having compressed videos compliant with the SMPTE2022-2 can be generated from the HD-SDI signals generated by the video transmitter 71, in conjunction with generating the HD-SDI signals from the IP packet streams having uncompressed videos received from the 10 GbE and compliant with the SMPTE2022-6, and they can be transmitted to the 10 GbEs. That is, it can achieve the video transmitters 3042, 3052 and 3062 illustrated in FIG. 3.

[0056] Although the present embodiments employ the JPEG2000 scheme as a compression encoding scheme and bit rate with 100 Mbps as a bit rate for compressed video, the embodiments can employ other encoding scheme such as H.264 and HEVC, and other bit rates. Further, although the above embodiments employ an HD-SDI signal as an uncompressed video signal, the present invention can be applied to a video signal in other format such as 3G-SDI and SD-SDI.

[0057] Further, it is apparent that the IGMP and PIM protocols can be used as a protocol for switching in the L2/L3 switch illustrated in FIGS. 2 and 3, and a static entry can be generated and controlled in a MAC address table, a routing table and a VLAN table in the switch.

[0058] In the present embodiment illustrated in FIG. 3, the external IP network 301, the recording studio 302 and the editing system 303 are connected to the L2/L3 switch 310 as a system for transmitting IP packet streams to the L2/L3 switch 310. However, the external IP network 301, the recording studio 302 and the editing system 303 are only shown as an example. The present invention includes any system for transmitting IP packet streams having compressed videos and IP packet streams having uncompressed videos to the L2/L3 switch 310, and never limit to the system illustrated in FIG. 3. For example, the video transmitter 61 illustrated in FIG. 6 may be set and any camera may be connected to the video transmitter 61 in a sports stadium, and the video transmitter 61 and the L2/L3 switch 310 may be connected to the 10 GbE. Further, for example the video transmitter 61 illustrated in FIG. 6 may be set in other external broadcast station other than the broadcast station in which the IP-based video delivering system 31 is set, and the video transmitter 61 and the L2/L3 switch 310 may be connected to the 10 GbE.

[0059] Further, in the present embodiment illustrated in FIG. 3, the sending system 304, archiving system 305, and the editing system 306 are connected to the L2/L3 switch 310 as a system for transmitting IP packet streams having uncompressed videos from the L2/L3 switch 310. However, the sending system 304, archiving system 305, and the editing system 306 are only shown as an example in FIG. 3. The present invention includes any system for transmitting IP packet streams having uncompressed videos from the L2/L3 switch 310, and never limit to the system illustrated in FIG. 3. For example, the L2/L3 switch 310 may be connected to the external IP network directly via the 10 GbE.

[0060] In this case, the IP packet streams having compressed videos and the IP packet streams having uncompressed videos are to be transmitted from the video transmitter 61 to the L2/L3 switch 310. The L2/L3 switch 310 transmits the IP packet streams having compressed videos to the IP-based monitoring system 32, and transmits the IP packet streams having uncompressed videos to the sending system and the editing system etc., and the external IP network respectively.

[0061] In the present embodiment illustrated in FIG. 3, the L2/L3 switch 320 selects IP packet streams having videos to be displayed on the monitors 321 to 328 among the IP packet streams having compressed videos from the L2/L3 switch 310, and outputs the selected IP packet streams to the 1 GbEs 3201 to 3208 respectively in the IP-based monitoring system 32. However, the L2/L3 switch 320 may be omitted, and the L2/L3 switch 310 may selects directly streams having videos to be displayed on the monitors 221 to 228 among the IP packet streams having compressed videos, and output the selected streams to the 1 GbEs 3201 to 3208 respectively.

[0062] Further, the present embodiments describe the case of transmitting videos only, and the video transmitter may compress audio data in the uncompressed video signals according to the AAC scheme and AC3 scheme etc., to generate IP packet streams, and transmits the generated IP packet stream to the monitoring system, thereby reducing costs for the monitoring system as in the case of transmitting video data.