WO2016000211A1

WO2016000211A1 - Video data transmission device, method, server, base station and client

Info

Publication number: WO2016000211A1
Application number: PCT/CN2014/081391
Authority: WO
Inventors: 邓晓琳; 韩广林
Original assignee: 华为技术有限公司
Priority date: 2014-07-01
Filing date: 2014-07-01
Publication date: 2016-01-07
Also published as: CN105453512B; CN105453512A

Abstract

The present invention relates to the field of communications. A video data transmission device, method, server, base station and client, being capable of enabling video data transmission to be more efficient and meeting customer requirements. The method comprises: a server segments a video and encodes the video segments by various means; a base station computes a data rate of a client according to channel quality, and selects an appropriate encoding rate according to the data rate for video data transmission.

Description

Video data transmission device, method, server, base station and client

Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a video data transmission apparatus, method, server, base station, and client. Background technique

With the development of the fourth generation of mobile communication technology, mobile video services require more data traffic. The widely used video data transmission technology in the prior art is HAS (Http Adaptive Streaming) technology, which is to The source video data is sliced, and each slice is coded by a coding technique of a different code rate, and a search file of each slice and its corresponding code rate is generated, and the client requests a slice of a specific code rate. The index file is downloaded first, and then the video fragment corresponding to the code rate required by the client is found according to the index file, and finally the video fragment is obtained and the video fragment is decoded.

In the process of video data transmission using the prior art, the inventors have found that the prior art has at least the following problems:

After the channel quality is deteriorated, after the video encoding is performed by the encoding method originally determined by the client, after the encoded video segment is transmitted to the client via the changed channel, the video quality received by the client will be due to The channel quality is deteriorated and correspondingly deteriorates;

When the channel quality becomes better than before, if the video fragment is still encoded using the encoding method currently determined by the client, channel resources will be wasted. Summary of the invention

Embodiments of the present invention provide a video data transmission apparatus, method, server, base station, and client, which are capable of adjusting a video slice coding mode according to a change in channel quality, making video data transmission more efficient and satisfying customer requirements.

A first aspect of the embodiments of the present invention provides a video data transmission apparatus, where the apparatus includes:

a segmentation unit, configured to segment the video data by time, and encode each video segment by using different coding modes to form a video segment, where each of the coding modes corresponds to one video segment. And generating fragmentation information corresponding to each video segment and fragmentation information corresponding to each of the video segments, where the segmentation information includes a length of time corresponding to the video segment, and the fragmentation information The fragmentation information includes a coding mode corresponding to the video segment and a code rate corresponding to the coding mode, and a quantization unit, configured to acquire, from the segmentation unit, each video segment corresponding to each segment, and according to the video The objective evaluation method quantifies the quality of the video segmentation, and generates a quality quantization result, where the quality quantization result includes different quality scores, and the code rates in different numerical ranges are represented as different quality scores, and the quality scores In proportion to the code rate;

a description unit, configured to acquire the segmentation information, the fragmentation information, and the quality quantization result from the segmentation unit and the quantization unit, to generate a media description file corresponding to the video segment, where the media The description file includes the segmentation information and the fragmentation information and the quality quantization result;

a file sending unit, configured to acquire the media description file from the description unit, and send the media description file to a client, so that the base station determines, according to the media description file and the channel quality, the video segment corresponding to each segment .

With reference to the first aspect, in a first possible implementation, the device further includes: a request receiving unit, configured to acquire video service request information, after the sending the media description file to a client, where the request information includes The first fragmentation information of the first video fragment corresponding to the video segment, where the video service includes an adaptive streaming service;

And a fragment sending unit, configured to acquire the first fragmentation information from the request receiving unit, and send the first video fragment corresponding to the first fragmentation information to the client.

A second aspect of the embodiments of the present invention provides a video data transmission apparatus, where the apparatus includes:

a description file receiving unit, configured to acquire a media description file, where the media description file includes segmentation information of the video data, fragmentation information, and a quality quantization result of the video data, where the segmentation information includes a score of the video data The time length corresponding to the segment, the fragmentation information includes a coding mode corresponding to the video segment of the video data, and a code rate corresponding to the coding mode, where the quantization result includes different quality scores, and different value ranges The code rate is expressed as a different quality score, and the quality score is proportional to the code rate;

a user information receiving unit, configured to acquire user information, where the user information includes a channel signal to noise ratio between the client and the base station, and the lowest quality score required by the client; a capability calculation unit, configured to acquire the channel signal to noise ratio from the user information receiving unit, and determine, according to the channel signal to noise ratio, a data transmission capability of the client within the time length, where the data transmission capability includes the The number of data bits that the client can transmit on a resource block;

a data rate determining unit, configured to acquire the data transmission capability from the capability computing unit, and determine, according to the data transmission capability and the minimum required quality score of the client, the client in the time length An allocated data rate, the data rate including a ratio of a number of data bits transmitted by the client over a resource block within the length of time to a number of data bits of all resource blocks within the length of time;

a fragment determining unit, configured to acquire the data rate from the data rate determining unit, and determine, according to the data rate, the first video segment corresponding to the video segment, so that the server and the client The first video slice is transmitted. In conjunction with the second aspect, in a first possible implementation, the apparatus further includes:

a service request obtaining unit, configured to acquire video service request information sent by the client, where the request information includes first fragment information corresponding to the first fragment corresponding to the video segment;

a modifying unit, configured to acquire the video service request information from the service request obtaining unit, and modify the coding mode in the video service request information to a first coding mode corresponding to the first fragment information, and And modifying the coded code rate in the video service request information to a first coded code rate corresponding to the first slice information;

And a request sending unit, configured to obtain the modified video service request information from the modifying unit, and send the modified video service request message to the server.

A third aspect of the embodiments of the present invention provides a video data transmission apparatus, where the apparatus includes:

a user information sending unit, configured to send user information to the base station, where the user information includes a channel signal to noise ratio between the client and the base station, and a minimum quality score required by the client, and a video coding rate representation in different value ranges For different quality scores, the quality score is proportional to the code rate;

a request information sending unit, configured to send video service request information to the base station after the user information sending unit sends the user information, so that the base station modifies and forwards the video service request information to a server, where The request information includes a video segment corresponding to the video segment and an encoding mode corresponding to the video segment and an encoding code rate corresponding to the encoding mode, where the video segment is The segment is encoded to form the video segment;

a segment obtaining unit, configured to: after the request information sending unit sends the video service request message, acquire a video segment and a media description file corresponding to the video segment, where the media description file includes segmentation information of the video data And the fragmentation information, the segmentation information includes a length of time corresponding to the segment of the video data, where the fragmentation information includes a first coding mode corresponding to the video segment and a first corresponding to the first coding mode a code rate;

a decoding unit, configured to acquire the first encoding mode from the segment obtaining unit, decode the video segment and read the decoded video in the time length according to a decoding manner corresponding to the first encoding mode data.

A fourth aspect of the embodiments of the present invention provides a video data transmission method, where the method includes:

The video data is segmented by time, and each video segment is coded by using different coding modes to form a video segment, and each of the coding modes corresponds to one video segment, and segments corresponding to each video segment are generated. a piece of information corresponding to each of the video segments, the segment information includes a length of time corresponding to the video segment, the fragment information includes an encoding mode corresponding to the video segment, and the encoding The code rate corresponding to the mode;

Compensating the quality of the video segment according to the video objective evaluation method, and generating a quality quantization result, where the quality quantization result includes different quality scores, and the code rates in different numerical ranges are represented as different quality scores, The quality score is proportional to the code rate;

Generating a media description file corresponding to the video segment, where the media description file includes the segmentation information, the fragmentation information, and the quality quantization result;

And sending the media description file to the client, so that the base station determines the video segment corresponding to each segment according to the media description file and the channel quality.

With reference to the fourth aspect, in a first possible implementation, after the sending the media description file to a client, the method further includes:

After the media description file is sent to the client, the video service request information is obtained, where the request information includes first fragment information of the first video fragment corresponding to the video segment, and the video service includes an adaptive stream. a media service; sending, to the client, a first video fragment corresponding to the first fragmentation information.

A fifth aspect of the embodiments of the present invention provides a video data transmission method, where the method package Includes:

Obtaining a media description file, where the media description file includes fragmentation information of the video data, and a quality quantization result of the video data, where the fragmentation information includes a length of time corresponding to the segment of the video data, the fragmentation The information includes a coding mode corresponding to the video segment and a code rate corresponding to the coding mode, where the quantization result includes different quality scores, and the code rates in different numerical ranges are represented as different quality scores. The quality score is proportional to the code rate; obtaining user information, where the user information includes a channel signal to noise ratio between the client and the base station and the lowest quality score required by the client;

Determining, according to the channel signal to noise ratio, a data transmission capability of the client within the length of time, where the data transmission capability includes a number of data bits that the client can transmit on a resource block; according to the data transmission capability and The minimum required quality score of the client, determining a data rate allocated to the client within the length of time, the data rate including data transmitted by the client on a resource block within the length of time The ratio of the number of bits to the number of data bits of all resource blocks within the length of time;

Determining, according to the data rate, the first video segment corresponding to the video segment, so that the server and the client transmit the first video segment.

With reference to the fifth aspect, in a first possible implementation manner, after determining, by the client, the coding mode corresponding to the video segment and the coding code rate according to the data rate, the method further Includes:

Acquiring the video service request information sent by the client, where the request information includes the first fragment information corresponding to the first fragment corresponding to the video segment;

Modifying the coding mode in the video service request information to a first coding mode corresponding to the first fragmentation information, and modifying the coding rate in the video service request information to the first a first code rate corresponding to the fragmentation information;

The modified video service request message is sent to the server.

A sixth aspect of the embodiments of the present invention provides a video data transmission method, where the method includes:

Transmitting user information to the base station, where the user information includes a channel signal to noise ratio between the client and the base station and a minimum quality score required by the client, and the video coding rate in different numerical ranges is represented as different quality scores. The quality score is proportional to the code rate; Sending video service request information to the base station, so that the base station modifies and forwards the video service request information to the server, where the request information includes a video segment corresponding to the video segment and a coding mode corresponding to the video segment. And an encoding code rate corresponding to the encoding mode, where the video segment is encoded to form the video segment;

Acquiring a video segment and a media description file corresponding to the video segment, the media description file includes segmentation information of the video data, and fragmentation information, where the segmentation information includes a length of time corresponding to the segment of the video data The fragmentation information includes a first coding manner corresponding to the video fragment and a first coding rate corresponding to the first coding mode;

The video segment is decoded and the decoded video data is read within the length of time according to a decoding mode corresponding to the first coding mode.

A seventh aspect of the embodiments of the present invention provides a server including a bus and a transmitter, a receiver, a memory, and a processor connected to the bus, the memory being configured to store an instruction, and the processor reads the Instructions are used to:

And sending, by the sender, the media description file to the client, so that the base station determines the video segment corresponding to each segment according to the media description file and the channel quality.

In conjunction with the seventh aspect, in a first possible implementation, the processor reads the instruction and is further used to:

After the media description file is sent to the client, the video service request information is obtained by the receiver, where the request information includes the first fragment information of the first video segment corresponding to the video segment, and the video The business includes adaptive streaming services; Transmitting, by the sender, the first video fragment corresponding to the first fragmentation information to the client.

An eighth aspect of the embodiments of the present invention provides a base station including a bus and a receiver, a transmitter, a memory, and a processor connected to the bus, the memory for storing an instruction, the processor reading Take this instruction for:

Obtaining, by the receiver, a media description file, where the media description file includes fragmentation information of the video data, and a quality quantization result of the video data, where the fragmentation information includes a length of time corresponding to the segment of the video data. The fragmentation information includes an encoding manner corresponding to the video fragment and a code rate corresponding to the encoding mode, where the quantization result includes different quality scores, and the code rates in different numerical ranges are represented as different locations. a quality score, the quality score being proportional to the code rate;

Acquiring user information by the receiver, where the user information includes a channel signal to noise ratio between the client and the base station and the lowest quality score required by the client;

With reference to the eighth aspect, in a first possible implementation, after the determining, by the client, the encoding manner corresponding to the video segment and the encoding code rate according to the data rate, the processing The device reads the instructions and is also used to:

The modified video service request message is sent to the server by the sender. A ninth aspect of an embodiment of the present invention provides a client including a bus and a transmitter, a receiver, a memory, and a processor connected to the bus, the memory for storing an instruction, the processing Read this instruction for:

Transmitting user information to the base station by using the transmitter, where the user information includes a channel signal to noise ratio between the client and the base station, and a minimum quality score required by the client, and the video coding rate in different value ranges is represented as different The quality score, the quality score is proportional to the code rate, and the video service request information is sent to the base station by the transmitter, so that the base station modifies and forwards the video service request information to the server. The request information includes a video segment corresponding to the video segment and an encoding mode corresponding to the video segment and an encoding code rate corresponding to the encoding mode, where the video segment is encoded to form the video segment;

Obtaining, by the receiver, a video segment and a media description file corresponding to the video segment, where the media description file includes segmentation information of video data, and fragmentation information, where the segmentation information includes a division of the video data. a length of time corresponding to the segment, where the fragment information includes a first encoding manner corresponding to the video fragment and a first encoding rate corresponding to the first encoding manner;

The embodiment of the present invention provides a video data transmission apparatus, method, server, base station, and client. First, the server segments the original video, and encodes each fragment according to different coding modes to form a video fragment, and performs fragmentation quality. Quantizing and generating a media description file, and then the base station obtains the media description file and the data transmission capability of the client in the channel, and determines the data rate of each client in each video segmentation time length according to the data transmission capability, and finally according to The media description file and the data rate determine the encoding mode of the video segment, and the video segmentation coding mode can be adjusted according to the channel quality change, so that the video data transmission is more efficient and meets customer requirements. DRAWINGS

Figure 1 is the first picture of Figure 1.

Figure 2 is the first picture

Figure 3 is the first picture of Figure 3

Figure 4 is the hair

Figure 4 5 is a schematic structural diagram 5 of a video data transmission apparatus according to an embodiment of the present invention; FIG. 6 is a schematic flowchart 1 of a video data transmission method according to an embodiment of the present invention;

FIG. 7 is a second schematic flowchart of a video data transmission method according to an embodiment of the present disclosure;

FIG. 8 is a schematic flowchart 3 of a video data transmission method according to an embodiment of the present disclosure;

FIG. 9 is a schematic flowchart 4 of a video data transmission method according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a server according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a client according to an embodiment of the present invention.

detailed description

The above described objects, features, and advantages of the present invention will become more apparent from the aspects of the invention.

The terms used in the embodiments of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the invention. "an," and "the" It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The embodiment of the present invention provides a video data transmission apparatus 01. As shown in FIG. 1, the apparatus 01 includes: a segmentation unit 011, configured to segment video data by time, and perform different coding methods for each video segment. The encoding forms a video segment, each of the encoding modes corresponds to one video segment, and generates segmentation information corresponding to each video segment and segmentation information corresponding to each of the video segments, and the segmentation information is divided into segments. The segment information includes a length of time corresponding to the video segment, where the fragmentation information fragmentation information includes an encoding manner corresponding to the video fragment and a code rate corresponding to the encoding mode.

The quantization unit 012 is configured to obtain a code rate corresponding to the coding mode from the segmentation unit 011, quantize the quality of the video segment according to the video objective evaluation method, and generate a quality quantization result, where the quality quantization result includes different quality scores, different The code rate in the range of values is represented as a different quality score, and the quality score is proportional to the code rate;

a description unit 013, configured to acquire segmentation information and a quantization result from the segmentation unit 012 and the quantization unit, to generate a media description file corresponding to the video segment, where the media description file includes the segmentation information and the fragmentation Information and quantified results of the quality; The file sending unit 014 is configured to obtain a media description file from the description unit 013, and send the media description file to the client, so that the base station determines the video segment corresponding to each segment according to the media description file and the channel quality.

Further, as shown in FIG. 2, the device 01 further includes:

The request receiving unit 015 is configured to: after sending the media description file to the client, obtain the video service request information, where the request information includes the first fragment information of the first video segment corresponding to the video segment, where The video service includes an adaptive streaming service;

The fragment sending unit 016 is configured to obtain the first encoding mode and the first encoding rate from the request receiving unit 015, and send the first video fragment corresponding to the first fragment information to the client.

Further, the quantization unit 012 is specifically used to:

Performing a quantization test on the video quality of the video segment in the coding mode corresponding to the video segment, where the quantization test compares the video segment with the original video;

Quantitative testing methods include subjective or objective testing and generate quality quantified results.

Embodiments of the present invention provide a video data transmission apparatus. First, a server fragments an original video, and encodes each fragment according to a different encoding manner, and then quantizes the fragment quality and generates a media description file, and the fragment is segmented. And the corresponding media description file is sent to the client, so as to determine the video segment corresponding to the video segment according to the media description file and the channel quality, and the video segmentation coding mode can be adjusted according to the channel quality change, so that the video data transmission is more efficient and satisfies client needs.

The embodiment of the present invention provides a video data transmission device 02. As shown in FIG. 3, the device 02 includes: a description file receiving unit 021, configured to acquire a media description file, where the media description file includes segmentation information, fragmentation information of the video data, and The quality of the video data is quantized, and the segmentation information includes a length of time corresponding to the segmentation of the video data. The segmentation information includes a coding mode corresponding to the video segment of the video data and a code rate corresponding to the coding mode, and the quantized result includes different quality scores. , the code rate in different numerical ranges is expressed as different quality scores, and the quality score is proportional to the code rate;

The user information receiving unit 022 is configured to obtain user information, where the user information includes a channel signal to noise ratio between the client and the base station and a minimum quality score required by the client;

The capability calculation unit 023 is configured to obtain a channel signal to noise ratio from the user information receiving unit 022, and determine a data transmission capability of the client in a time length according to a channel signal to noise ratio, where the data transmission capability includes a client capable of transmitting on a resource block. Number of data bits; The data rate determining unit 024 is configured to obtain the data transmission capability from the capability calculating unit 023, and determine a data rate allocated to the client in the length of time according to the data transmission capability and the minimum quality score required by the client, and the data rate includes the client. The ratio of the number of data bits transmitted over a resource block over a length of time to the number of data bits of all resource blocks over that length of time;

a fragment determining unit 025, configured to acquire a data rate from the data rate determining unit 024, and determine, according to the data rate, the first video segment corresponding to the video segment, so that the server and the client transmit The first video slice.

Further, as shown in FIG. 4, the device 02 further includes:

The service request obtaining unit 026 is configured to obtain video service request information sent by the client, where the request information includes the first fragment information corresponding to the first fragment corresponding to the video segment;

The modifying unit 027 is configured to obtain the video service request information from the service request obtaining unit 026, modify the coding mode in the video service request information to the first coding mode corresponding to the first fragmentation information, and encode the video service request information. The code rate is modified to a first code rate corresponding to the first slice information;

The request sending unit 028 is configured to obtain the modified video service request information from the modifying unit 027, and send the modified video service request message to the server.

Further, the capacity calculation unit 023 is specifically used for:

The data transmission capability of the client over the length of time is determined by an adaptive modulation coding technique based on a channel signal to noise ratio between the client and the base station.

Further, the data rate determining unit 024 is specifically used to:

Allocating resource blocks within the length of time to the client one by one until the client meets the required minimum quality score or all resource blocks within the length of time have been allocated; if the client meets the required The lowest quality score, and there are unallocated resource blocks in the length of time, the unallocated resource blocks are further allocated to the client one by one until the client meets the highest transmission code rate or all resource blocks within the length of time Has been assigned;

After all resource blocks in the length of time are allocated, the ratio of the number of data bits transmitted by the client on the allocated resource block to the number of data bits on all resource blocks in the length of time is the length of time of the client. Data rate.

Further, the encoding mode determining unit 025 is specifically used to:

Determining a first coding mode in a coding mode of the video segment, where the first coding mode corresponds to the first The code rate is less than or equal to the data rate of the client.

Embodiments of the present invention provide a video data transmission apparatus, which first acquires a media description file and a data transmission capability of a client in a channel, and then determines a data rate of each client within a length of each video segment according to the data transmission capability. Finally, the video segment corresponding to the video segment is determined according to the media description file and the data rate, and the video segmentation coding mode can be adjusted according to the channel quality change, so that the video data transmission is more efficient and meets customer requirements.

The embodiment of the present invention provides a video data transmission device 03. As shown in FIG. 5, the device 03 includes:

The user information sending unit 031 is configured to send user information to the base station, where the user information includes a channel signal to noise ratio between the client and the base station, and a minimum quality score required by the client, and the video coding rate in different value ranges is represented as different. The quality score, the quality score is proportional to the code rate;

The request information sending unit 032 is configured to send the video service request information to the base station after the user information sending unit 031 sends the user information, so that the base station modifies and forwards the video service request information to the server, where the request information includes the video corresponding to the video segment. a slice and a coding mode corresponding to the video segment and an encoding code rate corresponding to the coding mode, where the video segment is encoded to form the video segment;

The segment obtaining unit 033 is configured to: after the request information sending unit 032 sends the video service request message, obtain a video segment and a media description file corresponding to the video segment, where the media description file includes segmentation information and fragmentation information of the video data. The segmentation information includes a length of time corresponding to the segment of the video data, and the segmentation information includes a first coding mode corresponding to the slice of the video data and a first coding code rate corresponding to the first coding mode;

The decoding unit 034 is configured to obtain the first encoding mode from the segment obtaining unit 033, decode the video segment in the length of time according to the decoding mode corresponding to the first encoding mode, and read the decoded video data.

The embodiment of the present invention provides a video data transmission device. After receiving the media description file, the client sends the user information, so that the base station receives the user information and rewrites the video service application message of the client according to the channel quality, and forwards the message to the server, and then sends the message to the server. The video is sliced, and the video slice is parsed, and the video slice coding mode can be adjusted according to the channel quality change, so that the video data transmission is more efficient and meets the customer's needs.

An embodiment of the present invention provides a video data transmission method. As shown in FIG. 6, the method includes: 5101. The video data is segmented by time, and each video segment is coded by using different coding modes to form a video segment, and each coding mode corresponds to one video segment, and a segment corresponding to each video segment is generated. The fragmentation information corresponding to each video segment, the segmentation information includes a length of time corresponding to the video segment, and the fragmentation information includes a coding mode corresponding to the video segment and a code rate corresponding to the coding mode.

5102. Quantify the quality of the video segmentation according to an objective video evaluation method, and generate a quality quantization result. The quality quantization result includes different quality scores, and the code rates in different numerical ranges are expressed as different quality scores, and the quality score and the code rate are positive. Than relationship.

5103. Generate a media description file corresponding to the video segment, where the media description file includes segmentation information, and the fragmentation information and the quality quantization result.

S104: Send a media description file to the client, so that the base station determines a video segment corresponding to each segment according to the media description file and the channel quality.

The embodiment of the present invention provides a video data transmission method. First, the server segments the original video, and encodes each fragment according to different encoding manners, and then quantizes the fragment quality and generates a media description file, and the fragment is segmented. And the corresponding media description file is sent to the client, so as to determine the video segment corresponding to the video segment according to the media description file and the channel quality, and the video segmentation coding mode can be adjusted according to the channel quality change, so that the video data transmission is more efficient and satisfies client needs.

The embodiment of the present invention provides a video data transmission method. As shown in FIG. 7, the method includes: S20: acquiring a media description file, where the media description file includes fragmentation information of the video data, and quality quantization result of the video data, where the fragmentation information includes The length of time corresponding to the segmentation of the video data, the fragmentation information includes the coding mode corresponding to the video segment and the code rate corresponding to the coding mode, and the quantization result includes different quality scores, and the code rates in different numerical ranges are represented as different quality scores. The quality score is proportional to the code rate.

S202. Acquire user information, where the user information includes a channel signal to noise ratio between the client and the base station, and a minimum quality score required by the client.

5203. Determine, according to a channel signal to noise ratio, a data transmission capability of the client within a time length, where the data transmission capability includes a number of data bits that the client can transmit on a resource block.

5204. Determine, according to a data transmission capability and a minimum quality score required by the client, a data rate allocated to the client within a length of time, where the data rate includes a resource block of the client over a length of time. The ratio of the number of transmitted data bits to the number of data bits of all resource blocks over that length of time.

S205. Determine, according to the data rate, the first video segment corresponding to the video segment, so that the server and the client transmit the first video segment.

Embodiments of the present invention provide a video data transmission method, which first acquires a media description file and a data transmission capability of a client in a channel, and then determines a data rate of each client within a length of each video segment according to the data transmission capability. Finally, the video segment corresponding to the video segment is determined according to the media description file and the data rate, and the video segmentation coding mode can be adjusted according to the channel quality change, so that the video data transmission is more efficient and meets customer requirements.

The embodiment of the present invention provides a video data transmission method. As shown in FIG. 8, the method includes: S30: transmitting user information to a base station, where the user information includes a channel signal to noise ratio between the client and the base station, and a minimum quality score required by the client. The video coding rate in different numerical ranges is expressed as different quality scores, and the quality score is proportional to the code rate.

5302. Send video service request information to the base station, so that the base station modifies and forwards the video service request information to the server, where the request information includes a video segment corresponding to the video segment and a coding mode corresponding to the video segment and corresponding to the coding mode. The code rate, the video segment is encoded to form a video slice.

5303. Obtain a video segment and a media description file corresponding to the video segment. The media description file includes segmentation information and fragmentation information of the video data, where the segmentation information includes a length of time corresponding to the segment of the video data, and the fragmentation information includes The first coding mode corresponding to the slice of the video data and the first coding rate corresponding to the first coding mode.

5304. Decode the video segment and read the decoded video data in a time length according to a decoding mode corresponding to the first coding mode.

The embodiment of the present invention provides a video data transmission method, which first sends a user information of a client and a video service request message to a base station, so that the base station rewrites the video segmentation coding mode in the video service request message to the base station according to the user information according to the user information. And the encoding method determined by the media description file, and forwarded to the server, and then receives the video fragment sent by the server, and finally decodes the received video fragment by using the corresponding decoding method, and can adjust the video fragment encoding mode according to the channel quality change. Make video data transmission more efficient and meet customer needs.

In order to enable those skilled in the art to more clearly understand the technical solutions of the present invention, a more detailed embodiment will be described below. The embodiment of the invention provides a video data transmission method. As shown in FIG. 9, the method includes:

5401. The server segments the original video data according to time, and uses different coding modes for each video segment to generate a video segment, and generates segment information corresponding to each video segment and a slice corresponding to the segment. The segmentation information includes a length of time corresponding to the video segment, and the fragmentation information includes an encoding mode corresponding to the video segment and a code rate corresponding to the encoding mode.

Specifically, it can be achieved by the following methods:

After the original video data is acquired by the video capture device, the server segments the original video data after the original video data is obtained, and the video data may be divided into video segments of the same length or different lengths, and The segmented video segments are encoded by different coding modes, and segmentation information and fragmentation information corresponding to each video segment are generated, and the segmentation information includes a length of time corresponding to the video segment, and the segmentation information includes The coding mode corresponding to the video fragment and the code rate corresponding to the coding mode.

Illustratively, in the HAS (Http Adaptive Streaming) service, there are 6 different coding modes, and the coding rates corresponding to the above coding modes are 128 kbps, 210 kbps, 350 kbps, 545 kbps, 876 kbps, and 1410 kbps, assuming HAS. The total length of the video is 100 seconds, and the video can be segmented. Each segment can be 5 seconds in length, that is, it can be divided into 20 segments, and then the 20 segments are respectively classified according to the above six The coding scheme of the code rate is coded, and each segment forms six coded versions.

5402. Perform video quality quantization processing on different coding versions of each video segment according to a coding rate, and generate a quality quantization result.

Specifically, it can be achieved by the following methods:

Performing quantization test on the video quality of the video segment in the coding mode corresponding to the video segment, and performing the quantization test according to the code rate corresponding to the coding mode corresponding to the video segment;

Quantitative testing methods include subjective testing or objective testing, and generate quality quantitative results. The quality quantitative results include five quality scores. The code rates in different numerical ranges are expressed as different quality scores, and the mass scores are proportional to the code rate.

For example, the video quality quantization may be performed on the six different coded versions of the foregoing HAS service, and the quantization process may be to quantize the coding rate of the six different coded versions into five scores according to the rate, and the fraction may be divided. Further quantified into the form of MOS (Mean Opinion Score) value, the quantized MOS value can range from 1 to 5 points, 1 represents The lowest rate score, 5 represents the highest rate score, and the quantified results of the above HAS service can be expressed as shown in Table 1 below.

Table 1

5403. Generate a media description file corresponding to the video segment, where the media description file includes segmentation information, and the fragmentation information and the quality quantization result.

5404. The server sends the media description file to the client.

S405: The client receives the media description file, generates user information, and sends user information to the base station.

Specifically, it can be achieved by the following methods:

After receiving the media description file, the client generates the minimum quality score required by the client according to the minimum video coding rate required by the client, and then the client calculates the channel signal to noise ratio at this time, and the signal to noise ratio is The minimum required quality score is generated and sent to the base station.

5406. The base station receives user information, and calculates a data transmission capability of the client within a video segmentation time length.

Specifically, it can be achieved by the following methods:

In the fourth generation mobile communication technology, due to the adaptive modulation and coding technology, the data transmission capability of the client can be determined by the channel signal to noise ratio between the client and the base station, and the data transmission capability indicates that the client can transmit on a resource block. The number of data bits.

It should be noted that different clients have the same or different data transmission capabilities on the same resource block.

S407. The base station determines, according to the minimum quality score required by the client and the data transmission capability, a data rate allocated to the client during the video segmentation time length. The specific method can be achieved by the following methods:

Allocating resource blocks within a length of time to the client one by one until the client meets the required minimum quality score or all resource blocks within the length of time have been allocated;

If the client meets the required minimum quality score and there are unallocated resource blocks in the length of time, the unallocated resource blocks are further allocated to the client one by one until the client meets the highest transmission code rate or the length of time. All resource blocks in the resource have been allocated;

For example, the data rate can be allocated to the client based on the greedy algorithm. The data rate allocation process can be divided into two rounds. In the first round of the allocation process, all clients can be added to the allocation queue first, and the video is segmented. The resource blocks are allocated one by one to the clients in the allocation queue. If one of the clients meets the minimum quality requirement required by the client, the client is temporarily removed from the allocation queue until the allocation queue is All resource blocks within the length of the null or video segmentation are allocated;

If, after the end of the first round of the allocation process, there are redundant resource blocks that are not allocated during the video segmentation time, all clients can be added to the allocation queue again, if a client is on a resource block. The highest data transmission capability, the resource block can be allocated to the client until all unallocated resource blocks are allocated or the allocation queue is empty.

After the process of allocating the resource blocks, calculating the data rate allocated by each client within the length of the video segment, the data rate indicating the number of data bits transmitted by the client on the resource block within the length of time and the The ratio of the number of data bits of all resource blocks in the length of time.

S408. The base station determines, according to a data rate of the client within a video segmentation time length, a coding mode and a coding code rate corresponding to the video segment of the client.

Specifically, it can be achieved by the following methods:

After determining the data rate of each client within the video segmentation time length, the client may select a data rate lower than the client data rate and the first closest to the data rate in all coding modes of the video segmentation. In the coding mode, the corresponding code rate is the first code rate, which can save resources and ensure that a video segment can be completely downloaded by the client within a segmentation time length.

S409. The base station acquires video service request information sent by the client, and performs the request information. Rewrite, and then forward the rewritten video service request message to the server.

Specifically, it can be achieved by the following methods:

After the client sends the video service request message, the base station acquires the video service request message, where the request information includes a coding mode corresponding to the video segment and an encoding code rate corresponding to the coding mode, and then the coding mode in the video service request message is modified. For the first coding mode determined by the base station for the client, the code rate is modified to a corresponding first code rate, and then the modified video service request message is forwarded to the server.

S410. The server receives the video service request message forwarded by the base station, and sends the video segment with the same coding mode as the request message to the client.

Specifically, it can be achieved by the following methods:

After receiving the video service request message forwarded by the base station, the server adds the video segment with the same coding mode as the first coding mode in the request message to the first resource block, where the first resource block is allocated to The resource block of the client corresponding to the request message.

The S41 client receives the video segment, and parses the video segment according to the media description file corresponding to the video segment.

Specifically, it can be achieved by the following methods:

After receiving the video segment sent by the server, the client reads the video segment and the media description file corresponding to the video segment from the allocated resource block, and determines, according to the media description file, that the video segment is encoded. The first coding mode is followed by decoding the received video segment by using a decoding mode corresponding to the first coding mode, and reading the decoded video data.

The embodiment of the present invention provides a video data transmission method. First, the server segments the original video, encodes each fragment according to different coding modes, quantizes the fragment quality, and generates a media description file, and then the base station obtains the media description file. And the data transmission capability of the client in the channel, and determining a data rate of each client within a length of each video segment according to the data transmission capability, and finally determining a video segment corresponding according to the media description file and the data rate The video segmentation can adjust the video segmentation coding mode according to the channel quality change, making the video data transmission more efficient and satisfying the customer's needs.

The embodiment of the present invention provides a server 03. As shown in FIG. 10, the server 03 includes a transmitter 031, a receiver 032, a bus 033, and a memory 034 and a processor 035, wherein the transmitter 031, the receiver 032, the memory 034, and the processing The device 035 is connected by a bus 033, the memory 034 For storing instructions, the processor 035 is configured to read the instructions for:

The video data is segmented by time, and each video segment is coded by using different coding modes to form a video segment, each coding mode corresponding to one video segment, and segmentation information corresponding to each video segment is generated. The fragmentation information corresponding to each video segment, the segmentation information includes a length of time corresponding to the video segment, the fragmentation information includes a coding mode corresponding to the video segment, and a code rate corresponding to the coding mode; The quality of the slice is quantified to generate quality quantified results. The quality quantified results include different quality scores. The code rates in different numerical ranges are expressed as different quality scores, and the quality scores are proportional to the code rate;

Generating a media description file corresponding to the video segment, where the media description file includes segmentation information and fragmentation information and quality quantization results;

The media description file is sent to the client by the transmitter 031 so that the base station determines the video segment corresponding to each segment according to the media description file and the channel quality. Further, the processor 035 reads the instruction and is also used to:

After the media description file is sent to the client, the video service request information is obtained by the receiver, where the request information includes the first fragmentation information of the first video segment corresponding to the video segment, and the video service includes the adaptive streaming media service;

Sending, by the sender, the first video fragment corresponding to the first fragmentation information to the client.

Further, the processor 035 reads the instruction specifically for:

The video quality of the video segmentation is quantified under the coding mode corresponding to the video segmentation, and the quantization test is to compare the video segment with the original video;

The embodiment of the present invention provides a server. First, the server fragments the original video, and encodes each fragment according to different coding modes, and then quantizes the fragment quality and generates a media description file, and the fragment and the corresponding The media description file is sent to the client to determine the encoding mode according to the media description file and the channel quality, and the video segmentation coding mode can be adjusted according to the channel quality change, so that the video data transmission is more efficient and meets the customer's needs.

The embodiment of the present invention provides a base station 04. As shown in FIG. 11, the base station 04 includes a transmitter 041, a receiver 042, a bus 043, and a memory 044 and a processor 045, wherein the transmitter 041 receives The processor 044 is connected to the processor 045 via a bus 043 for storing instructions, and the processor 045 is configured to read the instructions for:

And obtaining, by the receiver, a media description file, where the media description file includes fragmentation information of the video data, and a quality quantization result of the video data, where the fragmentation information includes a length of time corresponding to the segment of the video data, and the fragmentation information includes a video fragment corresponding to the video fragment. The coding mode and the code rate corresponding to the coding mode, the quantization result includes different quality scores, and the code rates in different numerical ranges are represented as different quality scores, and the quality score is proportional to the code rate;

The user information is obtained through the receiver 042, and the user information includes a channel signal to noise ratio between the client and the base station and a minimum quality score required by the client;

Determining the data transmission capability of the client over the length of time according to the channel signal to noise ratio, and the data transmission capability includes the number of data bits that the client can transmit on a resource block;

Determining the data rate allocated to the client over the length of time according to the data transmission capability and the minimum quality score required by the client, and the data rate includes the number of data bits transmitted by the client on the resource block within the length of time and within the length of time The ratio of the number of data bits of all resource blocks;

The first video segment corresponding to the video segment is determined by the client according to the data rate, so that the server and the client transmit the first video segment. Further, the processor 045 executes the instruction and is also used to:

Obtaining, by the receiver, the video service request information sent by the client, where the request information includes the first fragment information corresponding to the first fragment corresponding to the video segment;

Modifying the coding mode in the video service request information to the first coding mode corresponding to the first fragmentation information, and modifying the coding rate in the video service request information to the first coding rate corresponding to the first fragmentation information;

The modified video service request message is sent to the server through the sender.

Further, the processor 045 reads the instruction specifically for:

The data transmission capability of the client over the length of time is determined by an adaptive modulation coding technique according to the channel signal to noise ratio between the client and the base station.

Further, the processor 045 reads the instruction specifically for:

If the client meets the required minimum quality score and there are unallocated resource blocks in the length of time, the unallocated resource blocks are further allocated to the client one by one until the client satisfies the highest transmission code. Rate or all resource blocks within the length of time have been allocated;

Further, the processor 045 reads the instruction specifically for:

The first coding mode is determined in the coding mode of the video segment, and the first coding rate corresponding to the first coding mode is less than or equal to the data rate of the client.

The embodiment of the present invention provides a base station, which first obtains a media description file and a data transmission capability of a client in a channel, and then determines a data rate of each client within a length of each video segment according to the data transmission capability, and finally according to the data rate The media description file and the data rate determine the encoding mode of the video segment, and the video segmentation coding mode can be adjusted according to the channel quality change, so that the video data transmission is more efficient and meets customer requirements.

The embodiment of the present invention provides a client 05. As shown in FIG. 12, the base station 05 includes a transmitter 051, a receiver 052, a bus 053, and a memory 054 and a processor 055, wherein the transmitter 051, the receiver 052, and the memory 054 are The processor 055 is coupled via a bus 053 for storing instructions for reading the instructions for:

The user information is sent to the base station by the transmitter 051, and the user information includes a channel signal to noise ratio between the client and the base station and a minimum quality score required by the client, and the video coding rate in different numerical ranges is expressed as a different quality score, quality. The score is proportional to the code rate;

The video service request information is sent to the base station by the transmitter 051, so that the base station modifies and forwards the video service request information to the server, where the request information includes the video segment corresponding to the video segment and the coding mode corresponding to the video segment and the coding. The code rate corresponding to the mode, and the video segment is encoded to form a video segment;

The video segment and the media description file corresponding to the video segment are obtained by the receiver 052, where the media description file includes segmentation information and fragmentation information of the video data, and the segmentation information includes a length of time corresponding to the segment of the video data, and the fragmentation The information includes a first coding mode corresponding to the slice of the video data and a first coding code rate corresponding to the first coding mode;

The video slice is decoded over the length of time according to the decoding mode corresponding to the first coding mode, and the decoded video data is read.

The embodiment of the present invention provides a client, and after receiving the media description file, the client sends the user. Information, so that the base station receives the user information and rewrites the video service request message of the client according to the channel quality, and forwards the message to the server, and then receives the video segment sent by the server, and parses the video segment, and can adjust the video segment according to the channel quality change. The coding method makes video data transmission more efficient and meets customer needs.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

Claim

A video data transmission device, comprising:

a segmentation unit, configured to segment the video data by time, and encode each video segment by using different coding modes to form a video segment, each of the coding modes corresponding to one video segment, and generating each video Segmentation information corresponding to the segment and the fragmentation information corresponding to each of the video segments, the segmentation information includes a length of time corresponding to the video segment, and the fragmentation information fragmentation information includes a coding mode corresponding to the video segment and a code rate corresponding to the coding mode; a quantization unit, configured to acquire each video segment corresponding to each segment from the segmentation unit, and compare the video according to an objective evaluation method of the video The quality of the slice is quantized to generate a quality quantized result, the quality quantized result comprising different quality scores, the code rate in different value ranges being represented as different quality scores, the quality score and the code rate Proportional relationship;

The device according to claim 1, wherein the device further comprises: a request receiving unit, configured to acquire video service request information after the media description file is sent to the client, where the request information includes The first fragmentation information of the first video fragment corresponding to the video segment, where the video service includes an adaptive streaming service;

The apparatus according to claim 1, wherein the quantization unit is specifically configured to: perform quantization test on video quality of the video segment in an encoding mode corresponding to the video segment, where the quantization Testing is to compare the video slice with the original video;

The manner of the quantitative test includes a subjective test or an objective test, and the quality quantized result is generated.

4. A video data transmission device, comprising: a description file receiving unit, configured to acquire a media description file, where the media description file includes segmentation information of the video data, fragmentation information, and a quality quantization result of the video data, where the segmentation information includes a score of the video data The time length corresponding to the segment, the fragmentation information includes a coding mode corresponding to the video segment of the video data, and a code rate corresponding to the coding mode, where the quantization result includes different quality scores, and different value ranges The code rate is expressed as a different quality score, and the quality score is proportional to the code rate;

a user information receiving unit, configured to acquire user information, where the user information includes a channel signal to noise ratio between the client and the base station, and the lowest quality score required by the client;

a capability calculation unit, configured to acquire the channel signal to noise ratio from the user information receiving unit, and determine, according to the channel signal to noise ratio, a data transmission capability of the client within the time length, where the data transmission capability includes the The number of data bits that the client can transmit on a resource block;

a fragment determining unit, configured to acquire the data rate from the data rate determining unit, and determine, according to the data rate, the first video segment corresponding to the video segment, so that the server and the client The first video slice is transmitted.

The device according to claim 4, wherein the device further comprises: a service request obtaining unit, configured to acquire video service request information sent by the client, where the request information includes the video segment Corresponding first fragment corresponding to the first fragmentation information;

The device according to claim 4, wherein the capability calculation unit is specifically configured to: The data transmission capability of the client over the length of time is determined by an adaptive modulation coding technique according to a channel signal to noise ratio between the client and a base station.

The device according to claim 4, wherein the data rate determining unit is specifically configured to:

Allocating resource blocks within the length of time to the client one by one until the client meets a required minimum quality score or all resource blocks within the length of time have been allocated; if the client satisfies If the minimum quality score is required, and there are unallocated resource blocks within the length of time, the unallocated resource blocks are further allocated to the client one by one until the client satisfies the highest transmission code rate. Or all resource blocks within the length of time have been allocated;

After all the resource blocks in the length of time are allocated, the ratio of the number of data bits transmitted by the client on the allocated resource block to the number of data bits on all resource blocks in the time length is the client. The data rate at the end of the length of time.

8. The apparatus according to claim 4, wherein the coding mode determining unit is specifically configured to:

The first coding mode is determined in the coding mode of the video segment, and the first coding code rate corresponding to the first coding mode is less than or equal to the data rate of the client.

9. A video data transmission apparatus, comprising:

a request information sending unit, configured to send video service request information to the base station after the user information sending unit sends the user information, so that the base station modifies and forwards the video service request information to a server, where The request information includes a video segment corresponding to the video segment and an encoding mode corresponding to the video segment and an encoding code rate corresponding to the encoding mode, where the video segment is encoded to form the video segment;

a segment obtaining unit, configured to: after the request information sending unit sends the video service request message, acquire a video segment and a media description file corresponding to the video segment, where the media description file includes segmentation information of the video data And fragmentation information, the segmentation information including the video data a length of time corresponding to the segment, where the fragmentation information includes a first coding mode corresponding to the video segment and a first coding rate corresponding to the first coding mode;

10. A video data transmission method, comprising:

The method according to claim 10, after the sending the media description file to the client, the method further includes:

The method according to claim 10, wherein the quantizing the quality of the video segment according to the video objective evaluation method, and generating the quality quantization result comprises:

13. A video data transmission method, comprising:

The method according to claim 13, wherein after determining the coding mode corresponding to the video segment and the coding code rate according to the data rate, the method further Includes:

The modified video service request message is sent to the server.

The method according to claim 13, wherein the determining, according to the channel signal to noise ratio, the data transmission capability of the client within the length of time comprises:

The data transmission capability of the client over the length of time is determined by an adaptive modulation coding technique based on a channel signal to noise ratio between the client and a base station.

16. The method according to claim 13, wherein said transmitting according to said data The capability and the minimum required quality score required by the client, determining the data rate allocated to the client for the length of time includes:

The method according to claim 13, wherein the determining, according to the data rate, the first video segment corresponding to the video segment by the client, so that the server and the client transmit the location The first video segmentation. Includes:

Determining, in the coding mode of the video segment, a first coding mode corresponding to the first fragment, where the first coding code rate corresponding to the first coding mode is less than or equal to the data rate of the client.

18. A video data transmission method, comprising:

Transmitting user information to the base station, where the user information includes a channel signal to noise ratio between the client and the base station and a minimum quality score required by the client, and the video coding rate in different numerical ranges is represented as different quality scores. The quality score is proportional to the code rate;

Sending video service request information to the base station, so that the base station modifies and forwards the video service request information to the server, where the request information includes a video segment corresponding to the video segment and a coding mode corresponding to the video segment. And an encoding code rate corresponding to the encoding mode, where the video segment is encoded to form the video segmentation

Acquiring a video segment and a media description file corresponding to the video segment, where the media description file includes segmentation information and fragmentation information of the video data, where the segmentation information includes a length of time corresponding to the segment of the video data, The fragmentation information includes a first coding mode corresponding to the video fragment and a first coding rate corresponding to the first coding mode;

Decoding the video into the video length according to a decoding mode corresponding to the first coding mode The line decodes and reads the decoded video data.

A server, comprising: a bus and a transmitter, a receiver, a memory, and a processor coupled to the bus, the memory for storing an instruction, the processor reading the instruction for:

The server according to claim 19, wherein the processor reads the instruction and is further configured to:

After the media description file is sent to the client, the video service request information is obtained by the receiver, where the request information includes the first fragment information of the first video segment corresponding to the video segment, and the video The business includes adaptive streaming services;

Transmitting, by the sender, the first video segment corresponding to the first fragmentation information to the client.

The server according to claim 19, wherein the processor reads the instruction specifically for:

22. A base station, comprising: a bus and a receiver connected to the bus a processor, a memory and a processor, the memory for storing an instruction, the processor reading the instruction for:

The base station according to claim 22, wherein after determining, according to the data rate, the encoding manner corresponding to the video segment and the encoding code rate, the processor Reading the instructions is also used to:

Acquiring, by the receiver, the video service request information sent by the client, where the request information includes first fragment information corresponding to the first fragment corresponding to the video segment;

The modified video service request message is sent to the server by the sender.

The base station according to claim 22, wherein the processor reads the instruction specifically for:

Determining the channel signal to noise ratio between the client and the base station by an adaptive modulation coding technique The data transmission capability of the client over the length of time.

27. A client, comprising: a bus and a transmitter, a receiver, a memory and a processor coupled to the bus, the memory for storing an instruction, the processor reading the instruction for:

And acquiring, by the receiver, a video segment and a media description file corresponding to the video segment, where the media description file includes segmentation information and fragmentation information of the video data, where the segmentation information includes segmentation of the video data. Corresponding time length, the fragmentation information includes a corresponding video segment a first coding mode and a first coding rate corresponding to the first coding mode;