CN112995649A - Network terminal and network terminal evaluation method - Google Patents

Network terminal and network terminal evaluation method Download PDF

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Publication number
CN112995649A
CN112995649A CN201911285090.2A CN201911285090A CN112995649A CN 112995649 A CN112995649 A CN 112995649A CN 201911285090 A CN201911285090 A CN 201911285090A CN 112995649 A CN112995649 A CN 112995649A
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Prior art keywords
time
frame
video data
network terminal
determining
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CN201911285090.2A
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CN112995649B (en
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蒋艳兵
姜勃
刘京华
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Hisense Broadband Multimedia Technology Co Ltd
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Hisense Broadband Multimedia Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/004—Diagnosis, testing or measuring for television systems or their details for digital television systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
    • H04N21/4383—Accessing a communication channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control

Abstract

The application provides a network terminal and a network terminal evaluating method, which relate to the technical field of communication and comprise the following steps: receiving a channel switching operation instruction for switching to a specified multicast program, and recording the trigger time of the channel switching operation instruction; determining the time length between the received first frame video data and the first I frame video data of the specified multicast program; recording the starting display time of the first I frame video data; and determining the time difference between the display starting time and the trigger time, and correcting the time difference according to the duration between the first frame of video data and the first I frame of video data to obtain the channel switching speed of the network terminal. The method further improves the accuracy of the performance evaluation of the network terminal.

Description

Network terminal and network terminal evaluation method
Technical Field
The present application relates to the field of communications technologies, and in particular, to a network terminal and a network terminal evaluation method.
Background
In the related art, when evaluating the channel switching speed performance of a network terminal for a multicast program, a stopwatch or a timing instrument is usually adopted to calculate the difference of the time between the stop of a current program and a static frame or the output of a first frame from a black screen to the next program, and the difference is taken as the channel switching speed of the multicast program. In addition, to reduce errors, it is possible to operate to calculate the average value a plurality of times.
However, the accuracy of evaluating the performance of the network terminal by the method is low, and based on this, the embodiment of the application provides a network terminal evaluating method.
Disclosure of Invention
The exemplary embodiment of the invention provides a network terminal and a network terminal evaluation method, which can improve the accuracy of network terminal evaluation.
According to an aspect of the exemplary embodiments, there is provided a network terminal, including: an input unit configured to receive a user instruction;
a processor, respectively connected to the display screen and the input unit, configured to:
receiving a channel switching operation instruction for switching to a specified multicast program through the input unit, and recording the trigger time of the channel switching operation instruction;
receiving data of the specified multicast program through the input unit; and the number of the first and second electrodes,
determining the time length between the received first frame video data and the first I frame video data of the specified multicast program;
recording the starting display time of the first I frame video data;
and determining the time difference between the display starting time and the trigger time, and correcting the time difference according to the duration between the first frame of video data and the first I frame of video data to obtain the channel switching speed of the network terminal.
The beneficial effects produced by the embodiment are as follows: the method eliminates the influence of the time length between the first frame video data and the first I frame video data on the channel switching speed of the network terminal, and further improves the accuracy of the network terminal evaluation.
In some exemplary embodiments, the processor is further configured to:
determining a reception start time when the data of the specified multicast program starts to be received;
determining the receiving time of the I frame image of the first I frame video data of the specified multicast program;
determining a time duration between the start reception time and the I-frame image reception time.
The beneficial effects produced by the embodiment are as follows: the influence of the arrival time of the first I frame is eliminated, the influence of uncertainty of the arrival time of the I frame is eliminated, and the accuracy of network terminal evaluation is further improved.
In some exemplary embodiments, the processor is further configured to:
determining a channel switching speed of the network terminal determined based on each channel switching operation instruction by triggering a plurality of channel switching operation instructions;
and taking the average value of the plurality of channel changing speeds as the final channel changing speed of the network terminal.
The beneficial effects produced by the embodiment are as follows: the error can be further reduced by calculating the average value for multiple times, and the accuracy of evaluating the channel change speed is improved.
In some exemplary embodiments, the plurality of zapping operation instructions are zapping operation instructions for different multicast programs.
The beneficial effects produced by the embodiment are as follows: by the method, errors caused by the same multicast program after switching and before switching can be avoided when channel switching speed is evaluated.
In some exemplary embodiments, the processor is further configured to:
and correcting the time difference by subtracting the time length between the first frame of video data and the first I frame of video data from the time difference between the display starting time and the trigger time.
The beneficial effects produced by the embodiment are as follows: the channel switching speed of the network terminal can be obtained more intuitively through the method.
According to another aspect of the exemplary embodiments, there is provided a network terminal evaluating method, including:
receiving a channel switching operation instruction for switching to a specified multicast program, and recording the trigger time of the channel switching operation instruction;
determining the time length between the received first frame video data and the first I frame video data of the specified multicast program;
recording the starting display time of the first I frame video data;
and determining the time difference between the display starting time and the trigger time, and correcting the time difference according to the duration between the first frame of video data and the first I frame of video data to obtain the channel switching speed of the network terminal.
The beneficial effects produced by the embodiment are as follows: the method eliminates the influence of the time length between the first frame video data and the first I frame video data on the channel switching speed of the network terminal, and further improves the accuracy of the network terminal evaluation.
In some exemplary embodiments, the determining a duration between the first frame of video data and the first I frame of video data of the specified multicast program received comprises:
determining a reception start time when the data of the specified multicast program starts to be received;
determining the receiving time of the I frame image of the first I frame video data of the specified multicast program;
determining a time duration between the start reception time and the I-frame image reception time.
The beneficial effects produced by the embodiment are as follows: the influence of the arrival time of the first I frame is eliminated, the influence of uncertainty of the arrival time of the I frame is eliminated, and the accuracy of network terminal evaluation is further improved.
In some exemplary embodiments, the method further comprises:
determining a channel switching speed of the network terminal determined based on each channel switching operation instruction by triggering a plurality of channel switching operation instructions;
and taking the average value of the plurality of channel changing speeds as the final channel changing speed of the network terminal.
The beneficial effects produced by the embodiment are as follows: the error can be further reduced by calculating the average value for multiple times, and the accuracy of evaluating the channel change speed is improved.
In some exemplary embodiments, the plurality of zapping operation instructions are zapping operation instructions for different multicast programs.
The beneficial effects produced by the embodiment are as follows: by the method, errors caused by the same multicast program after switching and before switching can be avoided when channel switching speed is evaluated.
In some exemplary embodiments, the determining a time difference between the display start time and the trigger time, and modifying the time difference according to a duration between the first frame of video data and the first I frame of video data includes:
and correcting the time difference by subtracting the time length between the first frame of video data and the first I frame of video data from the time difference between the display starting time and the trigger time.
The beneficial effects produced by the embodiment are as follows: the channel switching speed of the network terminal can be obtained more intuitively through the method.
According to another aspect of the exemplary embodiments, a computer storage medium is provided, in which computer executable instructions are stored, and the computer executable instructions are used for executing the network terminal evaluating method described above.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 schematically illustrates a structural diagram of a network terminal provided in an embodiment of the present application;
FIG. 2 is a diagram illustrating multicast program zapping times;
FIG. 3 is a diagram illustrating interaction between a network terminal and a server;
fig. 4 is a flow chart illustrating a network terminal evaluation method;
fig. 5 is a flow chart illustrating a network terminal evaluation method;
FIG. 6 is a diagram illustrating multicast program zapping times;
fig. 7 is a diagram illustrating the timing of a multicast program zapping operation;
fig. 8 is a schematic diagram illustrating the structure of a network terminal;
fig. 9 exemplarily shows a schematic structural diagram of the network terminal evaluation device.
Detailed Description
The technical solution in the embodiments of the present application will be described in detail and removed with reference to the accompanying drawings. In the description of the embodiments herein, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" in the text is only an association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: three cases of a alone, a and B both, and B alone exist, and in addition, "a plurality" means two or more than two in the description of the embodiments of the present application.
In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of embodiments of the application, unless stated otherwise, "plurality" means two or more.
Fig. 1 is a schematic structural diagram of a network terminal 100 according to an embodiment of the present disclosure. The following describes an embodiment specifically by taking the network terminal 100 as an example. It should be understood that the network terminal 100 shown in fig. 1 is only one example, and the network terminal 100 may have more or fewer components than shown in fig. 1, may combine two or more components, or may have a different configuration of components. The various components shown in the figures may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.
A block diagram of a hardware configuration of a network terminal 100 according to an exemplary embodiment is exemplarily shown in fig. 1. As shown in fig. 1, the network terminal 100 includes: a Radio Frequency (RF) circuit 110, a memory 120, a display unit 130, a camera 140, a sensor 150, an audio circuit 160, a Wireless Fidelity (Wi-Fi) module 170, a processor 180, a bluetooth module 181, and a power supply 190.
The RF circuit 110 may be used for receiving and transmitting signals during information transmission and reception or during a call, and may receive downlink data of a base station and then send the downlink data to the processor 180 for processing; the uplink data may be transmitted to the base station. Typically, the RF circuitry includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
The memory 120 may be used to store software programs and data. The processor 180 performs various functions of the network terminal 100 and data processing by executing software programs or data stored in the memory 120. The memory 120 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. The memory 120 stores an operating system that enables the network terminal 100 to operate. The memory 120 may store an operating system and various application programs, and may also store codes for performing the methods described in the embodiments of the present application.
The display unit 130 may be used to receive input numeric or character information and generate signal input related to user settings and function control of the network terminal 100, and specifically, the display unit 130 may include a touch screen 131 disposed on the front surface of the network terminal 100 and may collect touch operations of a user thereon or nearby, such as clicking a button, dragging a scroll box, and the like.
The display unit 130 may also be used to display a Graphical User Interface (GUI) for displaying information input by or provided to the User and various menus of the network terminal 100. Specifically, the display unit 130 may include a display screen 132 disposed on the front surface of the network terminal 100. The display screen 132 may be configured in the form of a liquid crystal display, a light emitting diode, or the like. The display unit 130 may be used to display various graphical user interfaces described herein.
The touch screen 131 may cover the display screen 132, or the touch screen 131 and the display screen 132 may be integrated to implement the input and output functions of the network terminal 100, and after the integration, the touch screen may be referred to as a touch display screen for short. In the present application, the display unit 130 may display the application programs and the corresponding operation steps.
The camera 140 may be used to capture still images or video. The object generates an optical image through the lens and projects the optical image to the photosensitive element. The photosensitive element may be a Charge Coupled Device (CCD) or a Complementary Metal-oxide-Semiconductor (CMOS) phototransistor. The light sensing elements convert the light signals into electrical signals which are then passed to the processor 180 for conversion into digital image signals.
The network terminal 100 may further comprise at least one sensor 150, such as an acceleration sensor 151, a distance sensor 152, a fingerprint sensor 153, a temperature sensor 154. The network terminal 100 may also be configured with other sensors such as a gyroscope, barometer, hygrometer, thermometer, infrared sensor, light sensor, motion sensor, and the like.
The audio circuitry 160, speaker 161, microphone 162 may provide an audio interface between a user and the network terminal 100. The audio circuit 160 may transmit the electrical signal converted from the received audio data to the speaker 161, and convert the electrical signal into a sound signal for output by the speaker 161. The network terminal 100 may also be provided with a volume button for adjusting the volume of the sound signal. On the other hand, the microphone 162 converts the collected sound signal into an electrical signal, converts the electrical signal into audio data after being received by the audio circuit 160, and outputs the audio data to the RF circuit 110 to be transmitted to, for example, another network terminal, or outputs the audio data to the memory 120 for further processing. In this application, the microphone 162 may capture the voice of the user.
Wi-Fi belongs to a short-distance wireless transmission technology, and the network terminal 100 can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the Wi-Fi module 170, and provides wireless broadband internet access for the user.
The processor 180 is a control center of the network terminal 100, connects various parts of the entire network terminal using various interfaces and lines, and performs various functions of the network terminal 100 and processes data by running or executing software programs stored in the memory 120 and calling data stored in the memory 120. In some embodiments, the processor 180 may include one or more processors; the processor 180 may also integrate an application processor, which mainly handles operating systems, user interfaces, applications, etc., and a baseband processor, which mainly handles wireless communications. It will be appreciated that the baseband processor described above may not be integrated into the processor 180. In the present application, the processor 180 may run an operating system, an application program, a user interface display, and a touch response, and the processing method described in the embodiments of the present application. In addition, the processor 180 is coupled with the input unit 130 and the display unit 140.
And the bluetooth module 181 is configured to perform information interaction with other bluetooth devices having a bluetooth module through a bluetooth protocol. For example, the network terminal 100 may establish a bluetooth connection with a wearable electronic device (e.g., a smart watch) having a bluetooth module via the bluetooth module 181, so as to perform data interaction.
The network terminal 100 also includes a power supply 190 (such as a battery) to power the various components. The power supply may be logically connected to the processor 180 through a power management system to manage charging, discharging, power consumption, etc. through the power management system. The network terminal 100 may also be configured with a power button for powering on and off the network terminal, and locking the screen.
In the encoding process of video, except that an I-frame is a complete picture, both a P-frame and a B-frame are encoded according to the difference of the previous frame (P-frame) or the previous and subsequent frames (B-frames). Groups of Pictures (GOPs) are often referred to in video coding, and a GOP is actually a Group of consecutive Pictures. The length between two I-frames is usually called GOP length, and if a video has a certain GOP length of 120 frames and the film source is 60fps (i.e. 60 pictures are transmitted per second), the time difference between two I-frames is 2 seconds.
It should be noted that, the performance index of the zapping speed of a network terminal for a multicast type live program is usually represented by calculating the difference between the stop (still frame or black screen) of the current program and the first frame of the next program using a stopwatch or an instrument. To reduce errors, the calculation of the average value may be performed several times.
The inventor finds that the method cannot solve the problem of errors caused by the randomness of channel switching due to the length of the GOP of the live program. Particularly, in the case of a program image whose dynamic change is not large, the GOP length may be up to 4 seconds at maximum. If the method is adopted to evaluate the multicast program switching speed performance of a certain terminal, the maximum error can reach 4 seconds, and the error cannot be removed to the maximum extent.
Generally, the influence factors of the multicast program zapping time include the following aspects, as shown in fig. 2: internet Group Management Protocol (IGMP Protocol) processing time T1n (time for joining a multicast program to be switched to a multicast Group and sending a message that the multicast program joining is successful to a terminal device), device processing time T2n (time for a network terminal to read data from a cache), arrival time T3n of an I frame after zapping (time difference between the time when the device receives non-I frame data and the time when the device receives the next I frame data), and decoding time T4n of the device (time for the network terminal to decode the I frame image).
As mentioned above, a stopwatch or an instrument is usually used to calculate the time difference between the stop of a current program and a still frame or the output of a first frame from a blank screen to the next program, and to reduce the error, the operation of calculating the average value may be performed several timesAnd evaluating the channel switching speed of the network terminal (such as a digital video conversion box) according to the average value. In fig. 3, it is shown that the time to be considered when evaluating the zapping speed of the network terminal includes: after receiving a zapping operation command for switching to a specified multicast program, the network terminal transmits the zapping operation command to a server (such as a multicast switch, a film source server and the like) through an IGMP protocol, namely the time length required by the server (T1n in FIG. 2), the server adds the specified multicast program to a multicast group and transmits the multicast group to the network terminal so that the network terminal reads video data from a cache, namely the time length required by the network terminal, namely T2n in FIG. 2, the time length required by the network terminal for receiving first I-frame video data, namely T3n in FIG. 2, and the time length required by the network terminal for decoding the received first I-frame video data, namely T4n in FIG. 2. Therefore, it can be seen that the station change speed of the network terminal is Tn ═ (T1n + T2n + T3n + T4n), where n represents the number of times of station changes, and T1 and T2 … Tn are the speeds of each station change, respectively, and in order to make the determined station change speed more accurate, the final station change speed can be represented by using the average value of a plurality of determined station change speeds, that is, the final station change speed can be calculated
Figure BDA0002317763090000091
As the final determined zapping speed, wherein TdRepresenting the final zapping speed.
The longer the GOP length, the higher the compression rate, the longer the time for the I-frame to reach the device after zapping. In addition, for the same program content, the longer the GOP length, the smaller the bandwidth occupied by the transmission process. In practical applications, the GOP length of many high definition programs reaches even 5 seconds. Case 1: if the zapping speed is 7 seconds, 5 seconds (1 GOP length) are consumed for the arrival time of the I frame, and 71.4 percent is occupied; case 2 if an I-frame is received right after zapping (without any waiting I-frame time), the zapping speed is 2 seconds. Compared with the case 1, the channel switching speed is improved by 71.4% (5 seconds), and in fact, the terminal to be evaluated does not make any performance optimization, but the channel switching time is different.
Since the live program is transmitted by the server in real time during the encoding process, the User Datagram Protocol (UDP) packet transmitted by the server to the network terminal after the User zaps does not necessarily include an I frame. As described above, the time to wait for the I frame after zapping may reach 5 seconds in the worst case, but if the very first frame data is I frame data, the time to wait for the I frame is negligible. Therefore, a large error exists when the performance of the network terminal is evaluated in the mode, and a new network terminal evaluation method is provided based on the method so as to improve the accuracy of network terminal evaluation.
As described above, the performance evaluation of the multicast program switching speed of the network terminal is greatly influenced by the factor of when the first I frame data arrives after the user operates, and because of the real-time performance of the live program, the influence of the factor is random, which causes great uncertainty to the accuracy of the evaluation, and the live program switching speed of the terminal cannot be evaluated really. Referring to fig. 4, a network terminal evaluating method provided in the embodiment of the present application may be applied to a network terminal that plays a multicast program, for example: digital video transform box. After receiving channel switching operation of multicast programs triggered by a remote controller or other infrared devices, the method can execute the following steps:
step 401: receiving a channel switching operation instruction for switching to a specified multicast program, and recording the triggering time of the channel switching operation instruction, wherein the triggering time is assumed to be t 1.
Step 402: and determining the time length between the received first frame video data and the first I frame video data of the specified multicast program, wherein the time length is assumed to be delta T.
In one embodiment, a start receiving time when the data of the specified multicast program starts to be received may be determined, then an I-frame image receiving time when the first I-frame video data of the specified multicast program is received may be determined, and finally a time duration between the start receiving time and the I-frame image receiving time may be determined.
In the implementation, the time t2 (i.e. the start receiving time) of the first frame of video data is read in the processor of the network terminal through FFmpeg (FFmpeg is a set of open source computer programs which can be used for recording, converting digital audio and video and converting the digital audio and video into streams), and the channel switching speed of the network terminal is corrected by calculating the difference between t2 and t3 when the time t3 of the first I frame is read. In practice, ffmpeg can be implemented by the following code, but the program code is not limited thereto, and any program code that can implement the determination of the time length between the reception start time and the I-frame image reception time is applicable to the present application.
V/start to continuously read the buffered data after channel change
While((av_read_frame(context,&InPack)>＝0))
{
// decoding data
Len＝avcodec_decode_video2(context,&outFrame,&nComplete,&InPack)；
Recording time point t 2; the function is performed only once, avoiding that I-frames are performed multiple times before they arrive
I frame judgment
If(nComplete>0&&outFrame.key_frame)
{
Recording time point t 3;
break; // jump while cycle
}
}
V/calculate the difference between T2 and T3, Δ T-T3-T2.
In the program code, Δ T is used as a correction value for the zapping speed.
By the method, the influence of the arrival time of the first I frame is eliminated, the influence of uncertainty of the arrival time of the I frame is eliminated, and the evaluation accuracy of the network terminal is further improved.
Step 403: the start display time of the first I-frame video data is recorded, assuming that it is t 4.
Step 404: and determining the time difference between the display starting time and the trigger time, and correcting the time difference according to the duration between the first frame of video data and the first I frame of video data to obtain the channel switching speed of the network terminal.
In one embodiment, the time difference between the first frame video data and the first I frame video data is subtracted from the time difference between the display start time and the trigger time to correct the time difference, i.e., T-T4-T1- Δ T (where T represents a time point and T represents a time duration). And taking the T-T4-T1-delta T value as an evaluation standard for evaluating the channel switching speed of the network terminal. If T is large, the stage changing speed is slow; if T is small, the channel changing speed is high; the absolute value of T is the relative value of the complete channel switching time without the I frame waiting time, and the channel switching speed is evaluated by T and has higher objectivity and accuracy.
Furthermore, in order to make the determined zapping speed more accurate, the average of the multiple measurements can be used as the final zapping speed. For example, m measurements are taken, where m is a positive integer, and the average of the m measurements is determined to represent the final zapping speed.
In one embodiment, the zapping speed of the network terminal determined based on each zapping operation instruction may be determined by triggering a plurality of zapping operation instructions, and the average value of the plurality of zapping speeds is taken as the final zapping speed of the network terminal. The error can be further reduced by calculating the average value for multiple times, and the accuracy of evaluating the channel change speed is improved.
In one embodiment, the plurality of zapping operation instructions are zapping operation instructions for different multicast programs. Such as: the evaluation of the zapping speed of the network terminal is to switch the multicast program 1 to the multicast program 2, instead of switching to the multicast program 1 again in case of the currently playing multicast program 1.
By the method, errors caused by the same multicast program after switching and before switching can be avoided when channel switching speed is evaluated.
As described in detail below by the flow steps shown in fig. 5, in step 501: receiving a channel switching operation instruction for switching to the specified multicast program, counting the triggering time of the operation instruction as t1, and transmitting the channel switching operation instruction to the server.
Step 502: and the network terminal reads the cache data, wherein the cache data is transmitted after the server adds the specified multicast program into the multicast group.
Step 503: the buffered data is read in sequence, and the time t2 for reading the video data of the first frame is recorded (the recording time point is operated only 1 time, and the time is not recorded for the second and subsequent data reading operation).
Step 504: and judging whether the read video data is I-frame video data, if so, executing step 505, and if not, executing step 503.
Step 505: the time to read I-frame video data is recorded as t 3.
Step 506: the I-frame video data is decoded and parsed into pictures at time t 4.
As can be seen, the zapping operation time is t4-t1- (t3-t 2). Fig. 6 shows a schematic diagram of receiving a P frame instead of an I frame after a zapping operation, fig. 7 shows a schematic diagram of receiving a P frame instead of an I frame after a zapping operation, and t2 ≈ t3 in fig. 7, where the difference between t3 and t2 is only the judgment time of the I frame in the program code, and the value is very small.
Based on the same concept, as shown in fig. 8, an embodiment of the present application provides a terminal for reporting information, where the terminal includes: a processor 800 and a memory 801, wherein the processor 800 stores program code, and when one or more computer programs stored in the memory 801 are executed by the processor 800, the terminal is caused to perform the following processes:
receiving a channel switching operation instruction for switching to a specified multicast program, and recording the trigger time of the channel switching operation instruction;
determining the time length between the received first frame video data and the first I frame video data of the specified multicast program;
recording the starting display time of the first I frame video data;
and determining the time difference between the display starting time and the trigger time, and correcting the time difference according to the duration between the first frame of video data and the first I frame of video data to obtain the channel switching speed of the network terminal.
Optionally, the processor 800 is specifically configured to:
determining a reception start time when the data of the specified multicast program starts to be received;
determining the receiving time of the I frame image of the first I frame video data of the specified multicast program;
determining a time duration between the start reception time and the I-frame image reception time.
Optionally, the processor 800 is specifically configured to:
determining a channel switching speed of the network terminal determined based on each channel switching operation instruction by triggering a plurality of channel switching operation instructions;
and taking the average value of the plurality of channel changing speeds as the final channel changing speed of the network terminal.
Optionally, the multiple channel switching operation instructions are channel switching operation instructions for different multicast programs.
Optionally, the processor 800 is specifically configured to:
and correcting the time difference by subtracting the time length between the first frame of video data and the first I frame of video data from the time difference between the display starting time and the trigger time.
Referring to fig. 9, a network terminal evaluating device provided in the embodiment of the present application includes: a receiving module 91, a first determining module 92, a recording module 93, and a second determining module 94.
A receiving module 91, configured to receive a channel switching operation instruction for switching to a specified multicast program, and record trigger time of the channel switching operation instruction;
a first determining module 92, configured to determine a time duration between a first frame of video data of the received specified multicast program and a first I frame of video data;
a recording module 93, configured to record a display start time of the first I-frame video data;
a second determining module 94, configured to determine a time difference between the display start time and the trigger time, and correct the time difference according to a time length between the first frame of video data and the first I frame of video data, so as to obtain a channel switching speed of the network terminal.
In one implementation, the first determining module is specifically configured to:
determining a reception start time when the data of the specified multicast program starts to be received;
determining the receiving time of the I frame image of the first I frame video data of the specified multicast program;
determining a time duration between the start reception time and the I-frame image reception time.
In one implementation, the apparatus further comprises: the third determining module is used for determining the channel switching speed of the network terminal determined based on each channel switching operation instruction by triggering a plurality of channel switching operation instructions;
and taking the average value of the plurality of channel changing speeds as the final channel changing speed of the network terminal.
In one embodiment, the plurality of zapping operation instructions are zapping operation instructions for different multicast programs.
In an embodiment, the second determining module is specifically configured to: and correcting the time difference by subtracting the time length between the first frame of video data and the first I frame of video data from the time difference between the display starting time and the trigger time.
Since the network terminal and the computer storage medium in the embodiment of the present invention may be applied to the processing method, reference may also be made to the method embodiment for obtaining technical effects, and details of the embodiment of the present invention are not described herein again.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims (10)

1. A network terminal, characterized in that the network terminal comprises:
an input unit configured to receive a user instruction;
a processor, respectively connected to the display screen and the input unit, configured to:
receiving a channel switching operation instruction for switching to a specified multicast program through the input unit, and recording the trigger time of the channel switching operation instruction;
receiving data of the specified multicast program through the input unit; and the number of the first and second electrodes,
determining the time length between the received first frame video data and the first I frame video data of the specified multicast program;
recording the starting display time of the first I frame video data;
and determining the time difference between the display starting time and the trigger time, and correcting the time difference according to the duration between the first frame of video data and the first I frame of video data to obtain the channel switching speed of the network terminal.
2. The network terminal of claim 1, wherein the processor is configured to:
determining a reception start time when the data of the specified multicast program starts to be received;
determining the receiving time of the I frame image of the first I frame video data of the specified multicast program;
determining a time duration between the start reception time and the I-frame image reception time.
3. The network terminal of claim 1, wherein the processor is configured to:
determining a channel switching speed of the network terminal determined based on each channel switching operation instruction by triggering a plurality of channel switching operation instructions;
and taking the average value of the plurality of channel changing speeds as the final channel changing speed of the network terminal.
4. The network terminal of claim 3, wherein the plurality of zapping operation instructions are zapping operation instructions for different multicast programs.
5. The network terminal of claim 1, wherein the processor is configured to: and correcting the time difference by subtracting the time length between the first frame of video data and the first I frame of video data from the time difference between the display starting time and the trigger time.
6. A network terminal evaluating method is characterized in that the method comprises the following steps:
receiving a channel switching operation instruction for switching to a specified multicast program, and recording the trigger time of the channel switching operation instruction;
determining the time length between the received first frame video data and the first I frame video data of the specified multicast program;
recording the starting display time of the first I frame video data;
and determining the time difference between the display starting time and the trigger time, and correcting the time difference according to the duration between the first frame of video data and the first I frame of video data to obtain the channel switching speed of the network terminal.
7. The method of claim 6, wherein determining the duration between the first frame of video data and the first I frame of video data of the specified multicast program received comprises:
determining a reception start time when the data of the specified multicast program starts to be received;
determining the receiving time of the I frame image of the first I frame video data of the specified multicast program;
determining a time duration between the start reception time and the I-frame image reception time.
8. The method of claim 6, further comprising:
determining a channel switching speed of the network terminal determined based on each channel switching operation instruction by triggering a plurality of channel switching operation instructions;
and taking the average value of the plurality of channel changing speeds as the final channel changing speed of the network terminal.
9. The method of claim 8, wherein the plurality of zapping instructions are zapping instructions for different multicast programs.
10. The method of claim 6, wherein determining the time difference between the display start time and the trigger time and modifying the time difference based on the duration between the first frame of video data and the first I-frame of video data comprises:
and correcting the time difference by subtracting the time length between the first frame of video data and the first I frame of video data from the time difference between the display starting time and the trigger time.
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