WO2017128593A1

WO2017128593A1 - Method and device for processing high code rate transmission of digital television and high-definition digital television

Info

Publication number: WO2017128593A1
Application number: PCT/CN2016/085331
Authority: WO
Inventors: 苏志辉; 林铠鹏; 江楚发
Original assignee: 深圳国微技术有限公司
Priority date: 2016-01-28
Filing date: 2016-06-08
Publication date: 2017-08-03
Also published as: CN105578287A; CN105578287B

Abstract

The present invention relates to the technical field of digital televisions and provides a method of processing high code rate transmission of a digital television. The method comprises the following steps: receiving a high code rate transport stream; according to a filter condition configured by a user, filtering transport stream packets in the high code rate transport stream to obtain a low code rate transport stream; and transmitting the low code rate transport stream. The embodiment of the present invention adopts a method of filtering transport stream packets to solve the technical problem in the art in which the technology increasing the transmission efficiency cannot be applied to a machine-card separation solution, such that a high code rate transport stream can be converted to a low code rate transport stream easily and quickly, thereby greatly increasing the utilization rate of transmission bandwidth, and moreover, the entire converting process can be done simultaneously with the user viewing process, which is especially suitable for the transmission of a machine-card separation solution such as an integrated digital television.

Description

Method, device and high definition digital television for solving high bit rate transmission of digital television

Technical field

The invention belongs to the technical field of digital television, and in particular relates to a method and a device for solving high-speed rate transmission of digital television and a high-definition digital television.

Background technique

The most widely used and most common application for digital image communication is the digital television broadcasting system, which corresponds to MPEG2. _TS DVB (Digital Video The establishment of the Broadcasting (Digital Video Broadcasting) standard has accelerated the large-scale application of digital TV broadcasting systems. With the transition from analog TV to digital TV platform at home and abroad, the digital TV terminal technology has been evolving to meet the needs of local operators. The PCMCIA-based machine card separation scheme has been adhering to the principle of “one machine universal, machine card separation principle”. An important solution to address the differentiated needs of operators in different places. As technology continues to evolve, USB-based machine card separation solutions are gradually being accepted by operators.

In recent years, high-definition digital TV terminals are one of the main development directions of TV manufacturers, and high definition will inevitably bring TS (Transport) with very high data rate. Stream, transport stream) package, with the continuous provision of program quality requirements for digital TV terminal users and the advancement of TS data transmission technology, the single-channel TS code stream can even be as high as 150Mbp, which brings a great deal to the terminal card separation scheme. challenge.

In the prior art, in the case where the transmission bandwidth is relatively fixed, the manner of improving the transmission efficiency is roughly divided into two types: one is to change the code rate, and the step of encoding, decoding, transcoding, and re-encoding the high-rate TS is converted to The low bit rate TS; the second is to change the size, and divide the complete high bit rate TS packet into a number of small TS packets of a certain length for transmission. Although the former can achieve high bit rate and low bit rate conversion, in the process of changing the code rate, once the interruption occurs, it is very easy to cause data loss. Therefore, the former is difficult to use in the card separation scheme; Although the utilization of transmission bandwidth can be improved, the process of segmentation and re-integration requires a large amount of hardware resources, which causes a long pause of digital television broadcasting, which has an impact on the user's viewing experience.

In summary, the prior art has a technical problem that the utilization of the transmission bandwidth is low and the real-time transmission cannot be performed when the card is separated.

technical problem

Embodiments of the present invention provide a method for solving high-speed rate transmission of digital television, which aims to solve the technical problem that the transmission bandwidth utilization is poor and cannot be transmitted in real time when the machine card is separated.

Technical solution

The embodiment of the present invention is implemented as follows. A method for solving high-speed rate transmission of a digital television includes the following specific steps:

Receiving a high bit rate transport stream;

Filtering the transport stream packets in the high-rate transport stream according to the filtering conditions configured by the user, to obtain a low-rate transport stream;

Transmit a low bit rate transport stream.

The embodiment of the invention further provides an apparatus for solving high-speed rate transmission of a digital television, comprising:

An input unit, configured to receive a high bit rate transport stream;

a filtering unit, configured to filter, according to a filtering condition configured by the user, a transport stream packet in the high-rate transport stream to obtain a low-rate transport stream;

A transmission unit that transmits a low bit rate transport stream.

The embodiment of the invention further provides a high-definition digital television, comprising the apparatus as described above, the apparatus is configured to receive a high-rate transmission stream, and according to a filtering condition configured by a user, a transport stream packet in a high-rate transmission stream. After filtering, the low bit rate transmission stream is transmitted to the high definition digital television.

Beneficial effect

The method for solving the high bit rate transmission of the digital television disclosed by the invention can filter the transport stream packet in the high bit rate transport stream, so that the high bit rate transport stream can be easily and quickly converted into the low bit rate transport stream. Thereby, the utilization of the transmission bandwidth is greatly improved, and the entire conversion process can be synchronized while the user is watching, and is particularly suitable for the transmission of the separation mode of the high-definition digital television integrated machine.

DRAWINGS

1 is a working environment diagram of a method for solving high bit rate transmission of a digital television according to an embodiment of the present invention;

FIG. 2 is another working environment diagram of a method for solving high bit rate transmission of digital television according to an embodiment of the present invention; FIG.

FIG. 3 is a flowchart of a method for solving high bit rate transmission of a digital television according to an embodiment of the present invention; FIG.

FIG. 4 is a flowchart of filtering a transport stream packet in a high code rate transport stream according to a filter condition configured by a user according to an embodiment of the present invention, to obtain a low bit rate transport stream;

FIG. 5 is a flowchart of a method for solving high bit rate transmission of a digital television according to an embodiment of the present invention; FIG.

FIG. 6 is a flowchart of determining whether a transport stream packet in a transport stream meets a filter parameter according to an embodiment of the present invention;

FIG. 7 is a flowchart of a method for solving a high bit rate transmission of a digital television according to an embodiment of the present invention;

FIG. 8 is a flowchart of another method for solving a high bit rate transmission of a digital television according to an embodiment of the present invention;

FIG. 9 is a structural diagram of an apparatus for solving high-speed rate transmission of a digital television according to an embodiment of the present invention; FIG.

Figure 10 is a structural diagram of a filter unit according to an embodiment of the present invention;

FIG. 11 is a structural diagram of an apparatus for solving a high bit rate transmission of a digital television according to an embodiment of the present invention;

FIG. 12 is a structural diagram of a determining subunit provided by an embodiment of the present invention.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the embodiment of the present invention, the transport stream packet in the high-rate transport stream is filtered according to the filtering condition configured by the user, so that the high-rate transport stream can be easily and quickly converted into the low-rate transport stream. It improves the utilization of transmission bandwidth and realizes real-time transmission when the machine card is separated.

FIG. 1 shows a working environment for solving a method for high bit rate transmission of digital television provided by an embodiment of the present invention.

The descrambling device is connected to the broadcast television network to obtain the high-definition program data scrambled on the broadcast television network, and then descrambled, and then transmits the high-definition program data to the high-definition digital television through the USB interface for playing.

At this time, the transmission method is adapted to transmit the descrambled high-rate transmission stream from the descrambling device to the high-definition digital television.

FIG. 2 shows another working environment of a method for solving high bit rate transmission of digital television provided by an embodiment of the present invention.

The high-definition digital television is directly connected to the broadcast television network to obtain the high-definition program data scrambled on the broadcast television network, and then transmitted to the descrambling device through the PCMCIA to descramble, and finally the transmission device returns the descrambled high-definition program data. Play HD digital TV.

At this time, the transmission method is adapted to transmit the undisturbed high bit rate transport stream from the high definition digital television to the descrambling device.

Example 1:

FIG. 3 is a flowchart of a method for solving high bit rate transmission of a digital television according to an embodiment of the present invention, which is described in detail as follows:

In step S301, a high code rate transport stream is received.

In step S302, the TS packets in the high-rate transmission stream are filtered according to the filtering conditions configured by the user to obtain a low-rate transmission stream.

In the embodiment of the present invention, the configuration party of the filtering condition is an upper layer application that interacts with the user, and may be a high-definition digital television terminal, or may be another terminal inserted with a PCMCIA card.

The filtering condition includes a filtering parameter and a filtering mode, where the filtering parameter is used to identify a TS packet, and the filtering manner includes a filtering manner built in the system and a user-defined filtering manner.

In this case, the filtering parameter is an important condition for judging whether the TS packet should be filtered. Therefore, in order to prevent the TS packet required by the user from being filtered, the embodiment of the present invention uses the PID set of the TS packet header as a filtering parameter.

Of course, as long as the parameters that uniquely identify the TS packet can be used as filtering parameters.

When the embodiment of the present invention is used in the normal playback process of the program, the upper application only needs to obtain the PID of the audio and video data transmission according to the information of the currently broadcasted program, and then set the filtering parameter, and finally receives the filtering condition from the front end. The TS packet in which the PID is the current program audio is extracted from the transport stream, and the TS packet whose PID is the current program video is discarded, and the remaining PID packets are discarded.

In step S303, the low bit rate transport stream is transmitted.

The embodiment of the present invention is directed to the technical problem that the utilization rate of the transmission bandwidth of the prior art is low, and the TS packet filtering method is used to filter the TS packets satisfying the filtering conditions in the high-rate transmission stream according to the corresponding filtering manner, so that the filtering is performed. The transport stream only contains the program data required by the user, thereby greatly reducing the bit rate of the transport stream, improving the utilization of the transmission bandwidth, and shortening the delay time of the high code rate transport stream during transmission.

Of course, the transmission method of the embodiment of the present invention is not limited to the use of digital television broadcasting, and the user can use the present invention as long as it is a multiplexed transmission mode, such as a video image of a monitor and data transmission between storage devices. To reduce the bit rate of the transport stream and obtain a single data stream from the multiplexed transport stream.

Example 2:

In the embodiment of the present invention, the filtering manner includes whitelist filtering and blacklist filtering.

FIG. 4 is a flowchart of filtering a transport stream packet in a high-rate transport stream according to a filter condition configured by a user according to a user-configured filter condition, and obtaining a low-rate transport stream, which is as follows:

In step S401, a serial input of a high bit rate transport stream is received.

Embodiment 3 of the present invention adopts a method of filtering TS packets in a transport stream one by one, and therefore, a high code rate transport stream should be input serially.

In step S402, it is judged one by one whether the TS packets in the transport stream meet the filtering parameters.

In step S403, it is determined whether the current filtering mode is whitelist filtering. If yes, the process goes to step S404; if not, the process goes to step S405.

In step S404, the TS packets that meet the filtering parameters are reserved, and the non-compliant TS packets are discarded.

In step S405, the TS packet conforming to the filtering parameter is discarded, and the non-compliant TS packet is reserved.

In the embodiment of the present invention, the TS packets are filtered one by one, and each TS packet is filtered and judged, so that the transport stream filtering is more accurate, and the transport stream filtering efficiency is improved, thereby making the entire transport stream filtering process shorter and helpful. Real-time transmission when the machine card is separated.

In a multiplexed transport stream, for example, a cable with a high transmission bandwidth can generally transmit 8 channels at the same time. If whitelist filtering is used, the overhead can be effectively reduced and the current time can be obtained more quickly. The TS package of the program is watched. At the same time, the filtering method of “white list” is adopted, and the PID stored in the filtering parameter is less, and the overall space occupied by the filtering parameter is also smaller.

In a relatively small number of multiplexed transmission streams, for example, 4K high-definition digital televisions can only transmit two channels at the same time. If blacklist filtering is used, the accuracy of TS packet filtering can be improved. Avoid the omission of the TS package, making the viewing of the program more clear.

The filtering mode in the embodiment of the present invention can be adjusted by the upper layer application according to the viewing requirement of the user, or the upper layer application can be automatically adjusted according to the current program information, thereby facilitating the user's use.

Example 3:

FIG. 5 is a flowchart of a method for solving high bit rate transmission of a digital television according to an embodiment of the present invention, which is described in detail as follows:

After step S302 and before step S303, step S501 is further included.

In step S501, a discard tag is inserted in the discarded TS packet.

At this point, the drop label can be used for recovery of TS packets to avoid useful TS packets being discarded; it can also be used for transport of transport streams in subsequent applications.

That is to say, when the TS contains programs viewed by other users, subsequent applications can directly search for the required program data in the discarded TS packets, instead of transmitting or filtering the entire transport stream again, thereby not only reducing the current The bit rate of the user's transport stream, and can also reduce the bit rate of other users' transport streams.

Example 4:

FIG. 6 is a flowchart of determining whether a transport stream packet in a transport stream meets a filter parameter according to an embodiment of the present invention, and details are as follows:

In the embodiment of the present invention, the step of determining whether the TS packet in the transport stream meets the filtering parameter is performed one by one, and refining it to perform the following steps several times:

In step S601, one TS packet in the transport stream is received.

In the embodiment of the present invention, one TS packet in the high-rate transmission stream is processed in parallel, and the reserved TS packet is transmitted after the processing. At this time, one TS packet forms a new transport stream in the transmission process. The transport stream has been classified into a low bit rate transport stream to enable conversion of a high rate rate transport stream to a low bit rate transport stream.

In step S602, the header of the TS packet is parsed to obtain a PID value corresponding to the TS packet.

In step S603, based on the PID, it is determined whether the TS packet has been recorded in the filtering parameter.

The embodiment of the present invention adopts a filtering method for filtering TS packets one by one, which is different from the existing technology for changing the TS code rate by re-encoding. The whole filtering process has low overhead and high processing efficiency, and can quickly reduce the high code. The rate of the TS is such that the high bit rate TS enables real time transmission when the user views the program.

Example 5:

FIG. 7 is a flowchart of a method for solving a high-speed rate transmission of a digital television according to an embodiment of the present invention, which is described in detail as follows:

In step S701, the TS filtering mode of the current program is set. At this time, the "white list" filtering method is adopted.

In step S702, the TS source device side is started, waiting for the input of the high code rate TS. At this time, the TS is generally output from a tuner or a demodulator.

In step S703, the TS data is serially input, and one TS packet is received.

In step S704, it is determined whether the current TS packet is in the whitelist PID parameter set set by the upper layer application, and if yes, the process goes to step S705; otherwise, the process goes to step S706.

In step S705, the TS packet is reserved and output, and the flow goes to step S707.

In step S706, the TS packet is discarded and the discard tag is inserted, and the flow proceeds to step S707.

In step S707, whether the current upper layer application stops outputting, and if so, the flow is ended; otherwise, the process returns to step S703 to perform filtering of the next TS packet again.

The embodiment of the present invention adopts a method for performing whitelist filtering on a TS packet in a high code rate transport stream, so that a TS packet that is consistent with the filtering parameter is reserved and transmitted, and a TS packet that does not meet the filtering parameter is discarded, thereby making the high code The rate transport stream can be easily and quickly converted to a low bit rate transport stream, greatly improving the utilization of the transmission bandwidth.

Example 6

FIG. 8 is a flowchart showing another method for solving a high-speed rate transmission of a digital television according to an embodiment of the present invention, which is described in detail as follows:

In step S801, the TS filtering mode of the current program is set. At this time, the filtering method of "blacklist" is adopted.

In step S802, the TS source device is started, waiting for the input of the high code rate TS. At this time, the TS is generally output from a tuner or a demodulator.

In step S803, the TS data is serially input, and one TS packet is received.

In step S804, it is determined whether the current TS packet is in the blacklist PID parameter set set by the upper layer application, and if yes, the process goes to step S805; otherwise, the process goes to step S806.

In step S805, the TS packet is discarded and the discard tag is inserted, and the flow proceeds to step S807.

In step S806, the TS packet is reserved and output, and the flow proceeds to step S807.

In step S807, whether the current upper layer application stops outputting, and if so, the flow ends; otherwise, the process returns to step S803 to perform filtering of the next TS packet again.

The embodiment of the present invention adopts a blacklist filtering method for the TS packets in the high-rate transmission stream, so that the TS packets that are consistent with the filtering parameters are reserved and transmitted, and the TS packets that do not meet the filtering parameters are discarded, thereby making the high-code The rate transport stream can be easily and quickly converted to a low bit rate transport stream, greatly improving the utilization of the transmission bandwidth.

In the actual application of the embodiment of the present invention, a standard TS code stream with a code rate of generally 38 Mbps to 43 Mbps is used. If a standard definition program is transmitted, one TS transmits eight channels of programs, and the filtered TS data can be reduced by more than 80%; If it is a 1080P HD program, TS can transmit 4 channels of HD programs, TS data can be reduced by at least 70%; if it is 4K HD program, TS can transmit 2 channels of HD programs, TS data can be reduced by about 50%.

It will be understood by those skilled in the art that all or part of the steps in implementing the foregoing method embodiments may be implemented by a program and related hardware, and the program may be stored in a computer readable storage medium. Storage media, such as ROM/RAM, disk, CD, flash drive, etc.

Example 7

FIG. 9 shows a structure of an apparatus for solving high-rate transmission of digital television according to an embodiment of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown.

In the embodiment of the present invention, the apparatus for solving high-rate transmission of digital television includes a control unit 901, a filtering unit 902, and a transmission unit 903, where:

The control unit 901 is configured to receive a high code rate transport stream.

The filtering unit 902 is configured to filter the transport stream packet in the high-rate transport stream according to the filtering condition configured by the user, to obtain a low-rate transport stream.

The transmission unit 903 transmits the low bit rate transport stream.

The embodiment of the present invention is directed to the technical problem of low utilization of the transmission bandwidth of the prior art, and uses the TS packet filtering method to filter the TS packets satisfying the filtering conditions in the high-rate transmission stream according to the corresponding filtering manner, so that the filtered The transport stream only contains the program data required by the user, thereby greatly reducing the bit rate of the transport stream, improving the utilization of the transmission bandwidth, and shortening the delay time of the high code rate transport stream during transmission.

Of course, the transmission device of the embodiment of the present invention is not limited to the use of digital television broadcasting, and the user can use the transmission as long as it is a multiplexed transmission mode, such as a video image of a monitor and data transmission between storage devices. The device reduces the bit rate of the transport stream and obtains a single data stream from the multiplexed transport stream.

Example 8

FIG. 10 shows the structure of a filtering unit according to an embodiment of the present invention. For the convenience of description, only parts related to the embodiment of the present invention are shown, wherein:

The receiving subunit 1001 is configured to receive a serial input of the high bit rate transport stream.

The embodiment of the present invention adopts a method of filtering the TS packets in the transport stream one by one. Therefore, the high bit rate transport stream should be input serially.

The determining sub-unit 1002 is configured to judge whether the TS packets in the transport stream meet the filtering parameters one by one.

The whitelist filtering sub-unit 1003 is configured to: when the filtering mode is whitelist filtering, retain the transport stream packet that meets the filtering parameter, and discard the non-compliant transport stream packet.

The blacklist filtering sub-unit 1004 is configured to discard the transport stream packet that meets the filtering parameter and retain the non-compliant transport stream packet when the filtering mode is blacklist filtering.

For the whitelist filtering sub-unit 1003 and the blacklist filtering sub-unit 1004 in the embodiment of the present invention, the user can switch at any time according to the viewing requirement of the user, or the upper-layer application automatically converts according to the current program information, thereby facilitating the user. usage of.

Example 9

FIG. 11 shows a structure for solving a high-rate transmission of a digital television according to an embodiment of the present invention. For the convenience of description, only parts related to the embodiment of the present invention are shown, wherein:

The tag unit 1101 is configured to insert a discard tag in the TS packet that is discarded after filtering.

Example 10:

FIG. 12 shows the structure of the determining subunit 1002 provided by the embodiment of the present invention. For the convenience of description, only parts related to the embodiment of the present invention are shown, wherein:

The receiving module 1201 is configured to receive one TS packet in the transport stream.

The parsing module 1202 is configured to parse the header of the TS packet to obtain a PID value corresponding to the TS packet.

The determining module 1203 is configured to determine, according to the PID, whether the TS packet has been recorded in the filtering parameter.

Example 11

An embodiment of the present invention provides a high-definition digital television, including a transmission device, where the device is configured to receive a high-rate transmission stream, and filter the transport stream packet in the high-rate transmission stream according to a filtering condition configured by the user. Transmit low bit rate transport streams to HD digital TV.

The embodiment of the present invention is the practical application of the above embodiment. At this time, the digital television is an all-in-one, that is, the transmission device is installed together with the digital television.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

A method for solving high bit rate transmission of digital television, characterized in that it comprises the following specific steps:

Receiving a high bit rate transport stream;

Filtering the transport stream packets in the high-rate transport stream according to the filtering conditions configured by the user, to obtain a low-rate transport stream;

Transmit a low bit rate transport stream.
The method of claim 1 wherein said filtering conditions specifically comprise filtering parameters and filtering methods.
The method according to claim 2, wherein the filtering method comprises a filtering method built in the system and a user-defined filtering manner.
The method according to claim 2 or 3, wherein the filtering method comprises whitelist filtering and blacklist filtering;

The filtering of the transport stream packet in the high-rate transport stream according to the filtering condition configured by the user, to obtain the low-rate transport stream, specifically includes the following steps:

Determine whether the transport stream packets in the transport stream meet the filtering parameters one by one;

When the filtering mode is whitelist filtering, the transport stream packet that meets the filtering parameter is retained, and the transport stream packet that does not match is discarded;

When the filtering mode is blacklist filtering, the transport stream packet that meets the filtering parameter is discarded, and the transport stream packet that does not conform is retained.
The method of claim 4 wherein said high rate rate transport stream is serially input.
The method according to claim 5, wherein after filtering the transport stream packet in the high-rate transport stream according to the filter condition configured by the user, and obtaining the low-rate transport stream, the method further includes:

A drop tag is inserted in the dropped transport stream packet.
The method according to claim 5 or 6, wherein the determining whether the transport stream packet in the transport stream meets the filter parameter comprises the following steps:

Receiving a transport stream packet in the transport stream;

Parsing a packet header of the transport stream packet to obtain a PID value corresponding to the transport stream packet;

According to the PID, it is determined whether the transport stream packet has been recorded in the filter parameter.
An apparatus for solving high-speed rate transmission of a digital television, comprising:

An input unit, configured to receive a high bit rate transport stream;

a filtering unit, configured to filter, according to a filtering condition configured by the user, a transport stream packet in the high-rate transport stream to obtain a low-rate transport stream;

A transmission unit that transmits a low bit rate transport stream.
The apparatus according to claim 10, wherein said filtering condition specifically comprises a filtering parameter and a filtering mode.
The device according to claim 11, wherein the filtering mode comprises a filtering method built in the system and a user-defined filtering mode.
The device of claim 10, wherein the filtering unit comprises:

a determining subunit, configured to determine, by one by one, whether the transport stream packet in the transport stream meets the filtering parameter;

a whitelist filtering sub-unit, configured to: when the filtering mode is whitelist filtering, retain a transport stream packet that meets the filtering parameter, and discard a non-compliant transport stream packet;

The blacklist filtering sub-unit is configured to discard the transport stream packet that meets the filtering parameter and retain the non-compliant transport stream packet when the filtering mode is blacklist filtering.
The device of claim 11 wherein said device further comprises:

A tag unit for inserting a discard tag in the dropped transport stream packet.
The apparatus according to claim 11, wherein said determining subunit comprises:

a receiving module, configured to receive a transport stream packet in the transport stream;

a parsing module, configured to parse a packet header of the transport stream packet, to obtain a PID value corresponding to the transport stream packet;

The determining module is configured to determine, according to the PID, whether the transport stream packet has been recorded in the filtering parameter.
A high definition digital television, comprising: the apparatus according to any one of claims 8 to 13, the apparatus for receiving a high bit rate transport stream, and for a high code rate according to a filter condition configured by a user After the transport stream packet in the transport stream is filtered, the low bit rate transport stream is transmitted to the high definition digital television.