WO2009043249A1

WO2009043249A1 - Method and device for identifying streaming media video frame borders

Info

Publication number: WO2009043249A1
Application number: PCT/CN2008/072140
Authority: WO
Inventors: Bin Li; Jiantao Ye; Zhiyong Chen
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-09-28
Filing date: 2008-08-26
Publication date: 2009-04-09
Also published as: CN101141639B; CN101141639A

Abstract

A method for identifying streaming media video frame borders involves the steps of: receiving a server data unit (SDU) data packet of a streaming media video frame, deciding a method to compare the size of SDUs according to a subpacking method which is adopted when the stream media video frame is subpacked, comparing size of the current received SDU and that of the target SDU according to the decided comparing method, and deciding whether the current SDU is the border point of the video frame according to the comparing result. And the embodiment of the present invention discloses a device for identifying streaming media video frame borders.

Description

A method and apparatus for identifying a boundary of a streaming media video frame. The present application claims to be filed on September 28, 2007, the Chinese Patent Office, Application No. 200710046814.9, entitled "A Method and Apparatus for Identifying Streaming Video Frame Boundaries" Priority of Chinese Patent Application, the entire contents of which is incorporated herein by reference.

TECHNICAL FIELD The present invention relates to the field of network communication technologies, and in particular, to a method and apparatus for identifying a boundary of a streaming media video frame.

Background technique

The streaming video service refers to an application in which the terminal plays multimedia data while downloading. The feature is that the user can watch without waiting for the multimedia content to be completely downloaded, so the user does not need to wait for a long download time, and only needs to cache the data to be downloaded after a certain amount of playback, and then during the playback, the new The data is sequentially cached to the terminal to maintain the continuity of playback.

As shown in FIG. 1 , a protocol for carrying audio and video data in a commonly used media stream video service is a Real Time Transport Protocol (RTP). The method for transmitting video data is usually to divide an audio or video stream into a transmission before transmission. A plurality of RTP packets have the same time stamp of the RTP packets obtained by the same frame segmentation, so that the video frames can be combined on the receiving side. When transmitting a video frame using a wireless network, the RTP packet needs to be mapped to a Service Data Unit (SDU) packet of the radio access network before being transmitted, and then transmitted in an air interface.

When a video frame is sent by the wireless network, the video data is counted in units of frames at both the video source and the receiving end, and is counted in units of SDUs on the wireless network side.

Summary of the invention

The object of the embodiments of the present invention is to provide a method and a device for identifying a boundary of a video media frame, so that the network side can identify the video frame boundary, and then the video data can be counted in units of frames to ensure the transmission quality of the video data. .

An embodiment of the present invention provides a method for identifying a boundary of a streaming media video frame, including:

Receiving a service data unit SDU data packet of a streaming media video frame;

Determining a method for comparing SDU sizes according to a packetization method used when packetizing the streaming video frame before transmission; The currently received SDU is compared with the target SDU according to the determined comparison method, and according to the comparison result, whether the current SDU is a boundary point of the video frame is obtained.

Based on the foregoing technical solution, an embodiment of the present invention further discloses an apparatus for identifying a boundary of a streaming media video frame, including:

a receiving unit, configured to receive a service data unit SDU data packet of the streaming media video frame, and a determining unit, configured to determine a method for comparing the SDU size according to a packetizing method used when the streaming media video frame is packetized before sending;

And a comparison unit, configured to compare the currently received SDU with the target SDU according to the comparison method determined by the determining unit, and obtain, according to the comparison result, whether the current SDU is a boundary point of the video frame.

Compared with the prior art, the technical solutions disclosed in the embodiments of the present invention have the following advantages: The present invention can be determined on the wireless network side by using a packetization method used when packetizing the streaming media video frame before transmission. A method of comparing SDU sizes, and then, according to the comparison method, the boundary points of the video frames are identified by comparing the sizes of the SDUs, so that the wireless network can be evaluated in units of frames to ensure the transmission quality of the video data as much as possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of packetization and bearer of a prior art video frame;

2 is a schematic block diagram of a method embodiment of the present invention;

3 is a schematic block diagram of another embodiment of a method of the present invention;

4 is a schematic block diagram showing the structure of an apparatus embodiment of the present invention;

Figure 5 is a schematic block diagram showing the structure of another apparatus of the present invention;

6 is a schematic block diagram showing the structure of another apparatus of the present invention;

7 is a schematic block diagram showing the structure of another apparatus according to the present invention;

FIG. 8 is a schematic block diagram showing the structure of another apparatus of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the process of creating the present invention, the inventors have found that at least the following problems exist in the above background art: since the video data is counted in units of SDUs on the wireless network side, and the frame is used at the receiving end. The unit performs statistics. Therefore, the wireless network side cannot know exactly the application layer at the receiving end. The reception of the video data, therefore, even if the receiving end does not receive the complete video frame, the wireless network side cannot know in time. Further, the wireless network side cannot perform the transmission quality evaluation on the transmitted video data, and cannot Guarantee the transmission quality of video data.

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

The video frame is usually divided into several RTP packets, and the average packet method or the fixed packet method can be used. The average packetization method divides the same video frame into RTP packets of average size and maps them to the wireless network, so that all SDUs belonging to the same video frame are completely equal in size, that is, SDU _t = SDU _l+ ^ or the same The size of any two adjacent _SDUs of different sizes in the video frame differs by only one byte, and the previous SDU is smaller than the latter SDU, that is, ^^^ ^ " - the fixed packet method is the same video The frame is divided into RTP packets of exactly equal size. If it is not evenly divided, the remainder is divided into the last RTP packet, so that it is mapped in the wireless network, except for the last SDU in the same video frame, the remaining SDU size. All are equal, ie ^{SD U} , = ^{SD Ua} = ^{SD U} " = medical, and the last SDU in the video frame should be less than or equal to the value of the remaining SDU, ie ^{SD U} « ^≤ dish.

It should be noted that in order to ensure the transmission quality of video frames, a video frame should be divided into fewer SDUs as much as possible, that is, each SDU should be as large as possible. Therefore, a maximum SDU can be preset for the video frame ( That is, SDU _max ), when the video frame is large and requires average packetization, the difference between the size of all the SDUs obtained by the division and the maximum SDU is not too large. Generally, the difference between the size of each actual SDU and the specified SDU maximum value may be referred to as the margin of the SDU, and the value obtained by accumulating the remaining amounts of all SDUs in the same video frame is referred to as the The cumulative margin of the video frame. For the method of using average packetization, in general, the accumulated margin of a video frame does not exceed the size of the smallest SDU in the video frame.

Since the RTP has an explicit mapping relationship with the SDU in the wireless network, the size relationship between the RTP packets obtained by dividing the same video frame is consistent with the size relationship of the SDUs mapped to the wireless network. Therefore, for the wireless network side, Similarly, according to different characteristics of different packetization methods, the boundary rule of the video frame is identified by using the size rule of the SDU in the same frame. The method for identifying a boundary of a streaming media video frame provided by the embodiment of the present invention includes: receiving a service data unit SDU data packet of a streaming media video frame; and packetizing the streaming video frame according to the sending The method for comparing the size of the SDU is determined by the method of sub-packaging, and the SDU is compared with the target SDU according to the determined comparison method, and the current SDU is obtained as a boundary point of the video frame according to the comparison result. The target SDU may be the previous SDU of the current SDU, the minimum SDU received in the current video frame, or the largest SDU received in the current video frame, according to the comparison method.

In the following, taking the two different packetization modes, the average packetization and the fixed packetization, as an example, how the embodiment of the present invention identifies the boundary points of the video frame according to different packetization methods.

Referring to FIG. 2, FIG. 2 is a schematic block diagram of a method for an embodiment of the present invention. The method is applicable to the method of using an average packet to compare the size of each SDU obtained after the division, and identify the boundary of the video frame. point. The method includes:

S201: The wireless network receives the SDU sent by the upper layer;

S202: Determine whether the received SDU is a video SDU, and if yes, execute S203; otherwise, execute S208.

S203: The size of the SDU is calculated by the wireless network side. For convenience of description, the current SDU is referred to as SD, and the previous SDU is referred to as SDU^, and the current video frame is received in the current video frame. The smallest SDU is called SDU _mm . Since the present embodiment is an SDU divided by an average packet, the average packet is characterized in that the latter SDU in the same video frame is one byte larger than the previous SDU, or all SDUs in the same video frame are equal in size. In general, the cumulative margin of a video frame does not exceed the minimum SDU _mm size of the video frame. Therefore, further, the method for comparing the SDU size in this embodiment can be performed according to the following steps.

S204: The wireless network side determines whether the 8011 ₁ is smaller than SDUn, that is, two adjacent SDUs, wherein the next SDU is smaller than the previous one SDU, and if it is smaller, S205 is performed; otherwise, S206 is performed.

S205: The 8011 ₁ is determined to be the starting point of the current video frame, and the SDU^ is the ending point of the previous video frame.

S206: The wireless network side determines whether the difference between the SD and the SDU _mm is greater than 1 byte, that is, whether S / i > SDU _mm + l, and if yes, returns to the S205; otherwise, it is known 8011 ₁ is equal to SDU _mm or one byte larger than the SDU _mm . Further, S207 can be performed at this time. Whether the sum of the differences from the preset maximum SDU is greater than the SDU _mm , and if so, executing S205; otherwise, executing S208.

S208: It is determined that the SD is not a boundary point of the current video frame, and at this time, return to the S201. In addition, the SDU _mm in the foregoing embodiment may be an SDU having the smallest value in advance, in addition to the SDU having the smallest value received in the current video frame.

In the above embodiment, the average packetization method is taken as an example. The difference between any two SDUs of different sizes in the same video frame does not exceed one byte, and the subsequent SDUs in the same video frame. If the SDU is not smaller than the previous SDU, or all SDUs in the same video frame are equal in size, the wireless network side compares the received SDU with the size of the previously received SDU, and combines the average packets in the same video frame. The size rule of the SDU to identify whether the current SDU is the boundary point of the video frame. Therefore, the wireless network can count the video data in the streaming media service in units of frames, and on the basis of identifying the boundary point of the video frame, can perform video transmission quality evaluation on the wireless side to understand the quality of the user's experience (Quality of Experience , QoE ). At the same time, when the video quality is degraded, the corresponding Quality of Service (QoS) protection measures can be taken in the wireless network.

Referring to FIG. 3, FIG. 3 is a schematic block diagram of another embodiment of a method according to the present invention. The method is applicable to an SDU obtained by using a fixed packet method, and the video frame is identified by comparing the sizes of the SDUs. The boundary point. The method includes:

S301: The wireless network receives the SDU sent by the upper layer;

S302: Determine whether the received SDU is a video SDU, and if yes, execute S303; otherwise, execute S306.

S303: The size of the SDU is counted by the wireless network side. For convenience of description, the current SDU is referred to as SD, and the maximum SDU preset when the fixed packet is fixed is referred to as SDU _max . For example, the SDU is divided into fixed sub-packets as an example, and the fixed sub-packets are characterized in that the SDUs are equally equal in size in the same video frame; or the size of the remaining SDUs is equal to the preset except for the last SDU. SDU _max , and the size of the last SDU is smaller than SDU _max . therefore, The method of comparing the SDU sizes in this embodiment is compared according to the following steps.

S304: The wireless network side determines whether the 8011 ₁ is smaller than the SDU _max , if the value is smaller than the

SDU _max , then execute S305; otherwise, return to the S306.

S305: Determine that the SD is an end point of a current video frame, and the SDU ₁₊₁ is a starting point of a next video frame.

S306: It is determined that the SD is not a boundary point of the current video frame, and at this time, return to the S301. In the above embodiment, the remaining SDUs are equal to the maximum SDU except for the last SDU in the same video frame, and the last SDU is smaller than the remaining SDUs. Therefore, the wireless network side compares the size of the received SDU with the maximum SDU, and combines the size rule of each SDU in the same video frame to identify whether the current SDU is the boundary point of the video frame. Therefore, the wireless network can count the video data in the streaming media service in units of frames, and on the basis of identifying the boundary of the video frame, the video transmission quality can be evaluated on the wireless network side to understand the QoE of the user. At the same time, when the video quality is found to be declining, the corresponding QoS guarantees can also be taken on the wireless network.

The wireless network described in the above two embodiments may be UMTS (Universal Mobile)

Telecommunication System, TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), CDMA (Code Division Multiple Access), General Packet Radio Service (GPRS) The general packet radio service, or the EDGE (Enhanced Data Rates for GSM Evolution), and the like are not limited herein.

Related to the foregoing method embodiments, the embodiment of the present invention further discloses an apparatus for identifying a boundary of a streaming media video frame, where the apparatus may be located on a wireless network side, and can pass the currently received SDU and the current video frame. The SDUs received before the current SDU are compared in size, and it is determined whether the SDU is a boundary point of a video frame, thereby identifying different video frames.

Referring to FIG. 4, FIG. 4 is a schematic structural block diagram of an apparatus embodiment of the present invention, where the apparatus includes: a receiving unit 401, a comparing unit 402, and a determining unit 403, where

The receiving unit 401 is configured to receive an SDU of a streaming media video frame.

The determining unit 403 is configured to determine a method for comparing SDU sizes according to a packetization method used when packetizing the streaming media video frame before sending; Further, the packetization method may include an average packetization method and a fixed packetization method; the comparison unit 402 is configured to compare the selected compared SDUs with the comparison method determined by the determining unit 403. The size of the SDU currently received by the receiving unit 401 is compared, that is, the currently received SDU is compared with the target SDU according to the comparison method determined by the determining unit 403, and the current SDU is obtained as a video according to the comparison result. The boundary point of the frame;

The compared SDU may be selected according to the comparison method determined by the determining unit 403. For example, for the SDU obtained by the average packetization method, the previous SDU of the current SDU may be selected as the compared SDU. For the SDU obtained by the fixed packet method, the maximum SDU preset at the time of packetization can be selected as the compared SDU.

In the above embodiment, the determining unit 403 can determine a specific method for comparing the size of the SDU according to different packetization methods used when packetizing the video frame, and the comparing unit 402 follows the determined method. The SDU is compared in size to identify whether the received current SDU is a boundary point of the video frame, and the device can identify all the received SDUs to identify the boundary of each video frame, so that the wireless network can The video data in the streaming media service is collected for the unit, and on the basis of identifying the boundary of the video frame, the video transmission quality evaluation can be performed on the wireless network side to understand the user experience experience QoE.

Further, an embodiment of the present invention further discloses an apparatus for identifying a boundary of a streaming media video frame. Referring to FIG. 5, FIG. 5 is a schematic structural block diagram of another apparatus embodiment of the present invention. Based on the foregoing embodiment, the media stream video frame can be packetized by the average packetization method to obtain an SDU, and the video frame boundary is determined at the receiving end by comparing the sizes between the SDUs. The device includes a receiving unit 501, a comparing unit 502, and a determining unit 503, where the comparing unit 502 includes a first determining unit 5021, where

The receiving unit 501 is configured to receive an SDU of a streaming media video frame.

The determining unit 503 is configured to determine a method for comparing SDU sizes according to a packet method used when packetizing the streaming media video frame before sending;

In the embodiment, the packetization method is a method for averaging packetization. Therefore, the determining unit 503 is configured according to the size of the SDU obtained by using the average packet division, that is, the size of the same video frame is not equal. The method of comparing the size of the SDU is determined by only one byte difference between the two SDUs, and the latter SDU is larger than the previous SDU, or all SDUs in the same video frame are equal in size. In this embodiment, the first determining unit 5021 in the comparing unit 502 is selected to perform comparison judgment on the SDU obtained by the average packetizing method.

The first determining unit 5021 is configured to determine whether the current SDU received by the receiving unit 501 is smaller than the previous received SDU, and if yes, determine that the current SDU is the starting point of the current video frame, where the current The previous SDU of the SDU is the end point of the previous video frame.

In addition, on the basis of the foregoing embodiment shown in FIG. 5, the embodiment of the present invention further discloses an apparatus for identifying a boundary of a streaming media video frame, and the apparatus may be determined by the first determining unit 5021. When the current SDU is greater than or equal to the previous received SDU, the current SDU is further determined. As shown in FIG. 6, the comparing unit 502 in the device may further include:

The second determining unit 5022 is configured to determine, when the first determining unit 5021 determines that the currently received SDU is not smaller than the previous received SDU, the minimum received in the current SDU and the current video frame. Whether the difference of the SDU is greater than one byte, and if so, determining that the current SDU is the starting point of the current video frame, and the previous SDU is the ending point of the previous video frame.

Further, on the basis of the foregoing embodiment shown in FIG. 6, the embodiment of the present invention further discloses an apparatus for identifying a boundary of a streaming media video frame, and the apparatus is determined by the second determining unit 5022. As a result, when the current SDU is equal to the minimum SDU or one byte larger than the minimum SDU, the current SDU is further determined. As shown in FIG. 7, the comparing unit 502 in the device further Includes:

The third determining unit 5023 is configured to: when the determination result of the second determining unit 5022 is that the difference between the current SDU and the minimum SDU received in the current video frame is not more than one byte, determine that the current video frame is included. Whether the sum of the difference between all the received SDUs and the specified maximum SDU is greater than the minimum SDU received in the current video frame, and if so, determining that the current SDU is the starting point of the current video frame. And the previous SDU is the end point of the previous video frame; otherwise, the receiving unit 501 is instructed to perform the SDU function of receiving the streaming video frame.

In the foregoing embodiment, according to the characteristics of the SDU obtained by the average packetization method, the received SDU is received by the first determining unit 5021, the second determining unit 5022, and the third determining unit 5023 in the comparing unit 502. The SDU compares to determine whether the SDU is a boundary point of a video frame, and the device can identify the boundaries of each video frame by judging all received SDUs, so that the wireless network can be counted in units of frames. Number of videos in streaming media business According to the fact, on the basis of identifying the boundary of the video frame, the video transmission quality evaluation can be performed on the wireless network side.

At the same time, the embodiment of the present invention further discloses an apparatus for identifying a boundary of a streaming media video frame. Referring to FIG. 8 , it is a structural block diagram of another apparatus embodiment of the present invention. On the basis of the illustrated embodiment, the media stream video frame can be packetized by the fixed packet method to obtain an SDU, and the video frame boundary is determined at the receiving end by comparing the sizes between the SDUs. The device includes a receiving unit 801, a comparing unit 802, and a determining unit 803, where the comparing unit 802 includes a fourth determining unit 8021, where

The receiving unit 801 is configured to receive an SDU of a streaming media video frame.

The determining unit 803 is configured to determine a method for comparing SDU sizes according to a packet method used when packetizing the streaming media video frame before sending.

In this embodiment, the packetization method is a fixed packet, and the size of the SDU obtained by using the fixed packet is that all SDUs are equal in size or in addition to the last SDU in the same video frame. All SDUs are the same size and the last SDU is smaller than the remaining SDUs. The determining unit 803 in the embodiment determines a method of comparing the sizes of the SDUs according to the above features. In this embodiment, the fourth judging unit 8021 in the comparing unit 802 is selected to perform comparison judgment on the SDU obtained by the fixed subcontracting method.

The fourth determining unit 8021 is configured to determine whether the current SDU received by the receiving unit 801 is smaller than a preset maximum SDU, and if yes, determine that the current SDU is the end point of the current video frame, and the next The SDU is the starting point of the next video frame; otherwise, the receiving unit 801 is instructed to perform the SDU function of receiving the streaming video frame.

The foregoing embodiment compares the received SDU with the preset maximum SDU by selecting the fourth determining unit 8021 in the comparing unit 802 according to the characteristics of the SDU obtained by the fixed packet method, thereby determining whether the SDU is a video. The boundary point of the frame, the device can identify the boundaries of each video frame by judging all received SDUs, so that the wireless network can count the video data in the streaming media service in units of frames, and identify Based on the boundaries of the video frames, video transmission quality assessment can be performed on the wireless network side.

The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may be or It may not be a physical unit, that is, it may be located in one place, or it may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without deliberate labor.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which may be stored in a storage medium such as a ROM/RAM or a disk. , an optical disk, etc., includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

The embodiments of the present invention described above are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Rights request

A method for identifying a boundary of a streaming media video frame, comprising:

Receiving a service data unit SDU data packet of a streaming media video frame;

Determining a method for comparing SDU sizes according to a packetization method used when packetizing the streaming video frame before transmission;

The currently received SDU is compared with the target SDU according to the determined comparison method, and according to the comparison result, whether the current SDU is a boundary point of the video frame is obtained.

The method for identifying a boundary of a video media frame according to claim 1, wherein, when the video frame is divided by the average packet method, the comparing, according to the comparison result, whether the current SDU is a boundary of a video frame Point methods include:

When the currently received SDU is smaller than the previous received SDU, the current SDU is the starting point of the video frame, and the previous SDU of the current SDU is the ending point of the previous video frame.

The method for identifying a boundary of a streaming media video frame according to claim 1, wherein when the video frame is divided by the average packet method, when the current SDU is greater than or equal to the previous SDU, The method for determining whether the current SDU is a boundary point of a video frame according to the comparison result includes:

Determining whether the difference between the current SDU and the smallest SDU received in the current video frame is greater than one byte, and if yes, determining that the current SDU is the starting point of the current video frame, and the previous SDU is the previous video frame. The end point.

4. The method for identifying a boundary of a streaming media video frame according to claim 1, wherein when the video frame is divided by the average packet method, the current SDU is equal to the minimum received in the current video frame. When the SDU is one byte larger than the minimum SDU received in the current video frame, the method for determining whether the current SDU is a boundary point of the video frame according to the comparison result includes:

Determining whether a sum of differences between all received SDUs including the current SDU and the specified maximum SDU in the current video frame is greater than a minimum SDU received in the current video frame, and if yes, determining the current SDU It is the starting point of the current video frame, and the previous SDU is the ending point of the previous video frame.

The method for identifying a boundary of a video media frame according to claim 1, wherein, when the video frame is divided by the fixed packet method, the comparing, according to the comparison result, whether the current SDU is a boundary of the video frame Point methods include: If the currently received SDU is smaller than the preset maximum SDU, the current SDU is the end point of the current video frame, and the next SDU is the starting point of the next video frame.

A device for identifying a boundary of a streaming media video frame, comprising: a receiving unit, a service data unit SDU data packet for receiving a streaming media video frame; and a determining unit, configured to: A method of comparing the size of the SDU by using a packetization method for streaming video frame segmentation;

The apparatus for identifying a boundary of a streaming media video frame according to claim 6, wherein when the video frame is divided by the average packetization method, the comparing unit comprises:

The first determining unit is configured to determine whether the currently received SDU is smaller than the previous received SDU, and if yes, determine that the current SDU is the starting point of the current video frame, and the previous SDU of the current SDU is the previous video. The end point of the frame.

The device for identifying a boundary of a streaming video frame according to claim 7, wherein the comparing unit further comprises:

a second determining unit, configured to determine, when the first determining unit is that the currently received SDU is not smaller than the previous received SDU, determining the current SDU and the minimum SDU received in the current video frame. Whether the difference is greater than one byte, and if so, determining that the current SDU is the starting point of the current video frame, and the previous SDU is the ending point of the previous video frame.

The apparatus for identifying a boundary of a streaming media video frame according to claim 8, wherein the comparing unit further comprises:

a third determining unit, configured to: when the judgment result of the second determining unit is that the difference between the current SDU and the minimum SDU received in the current video frame is not more than one byte, determine that the current video frame includes the Whether the sum of the difference between the received SDU and the specified maximum SDU is greater than the minimum SDU received in the current video frame, and if so, determining that the current SDU is the starting point of the current video frame, and The previous SDU is the end point of the previous video frame.

The apparatus for identifying a boundary of a streaming media video frame according to claim 6, wherein when the video frame is divided by the fixed packet method, the comparing unit comprises: The fourth determining unit is configured to determine whether the currently received SDU is smaller than the preset maximum SDU, and if yes, determine that the current SDU is the end point of the current video frame, and the next SDU is the starting point of the next video frame.