TW200421880A - Method and apparatus for rate control in moving picture video compression - Google Patents

Abstract

A method and apparatus for rate control in moving picture video compression. According to the present invention, a total activity measure for a current picture to be encoded in a set of consecutive pictures of a video sequence is calculated first. Based on the total activity measure of the current picture and an activity-to-complexity ratio of a previously encoded picture of the same type in the set of consecutive pictures, a complexity measure of the current picture is estimated. A target bit budget is allocated to the current picture depending on the estimated complexity measure of the current picture. Then, the current picture is encoded according to the target bit budget. After encoding the current picture, the activity-to-complexity ratio for the current picture is computed based on the total activity, actual bits consumed by the current picture, and the average quantization step size of the current picture.

Description

200421880

[Technical field to which Mingming belongs] The present invention relates to: the field of compression and compression, and particularly refers to a type of video coding system that is suitable for controlling the vanadium position. Method and device. [Prior technology] The world of BitSonic communication is undergoing a number of digital revolutions. The main advantage of using a digital table to represent 5 holes is that it can store #, regenerate, transmit, and process lean bitstreams (bitstr) without error. eam). For example, NTSC's color video image has 2 997 daylight surfaces per second, and each daytime surface has 480 visible scanning lines. Each scanning line requires approximately 480 points in red, green, and blue. Pixels rendered in three blue colors, but if each color component is encoded in 8 bits, the resulting bitrate is about 168 million bits per second (Mbits / s), so various video formats Its uncompressed bit rate is very high and uneconomical, so it is not suitable for most applications. Digital audio and video integrated with computers, telecommunications networks, and consumer products have further stimulated the information revolution. The core of this revolution is digital compression technology for video and audio. Many compression standards, including algorithms based on the essence of common compression technology, such as: ITU-T (formerly CCITT) Recommendations Η.261 and Η.2 6 3, and ISO / IEC MPEG-1, MPEG -2 and MPEG-4 standards. The MPEG algorithm was developed by the Moving Picture Experts Group (MPEG), which is an international standard organization (I n t e r n a t i ο n a 1

Standards Organization (ISO) and International Electrotechnical Commission (IEC)

0702-7302TWf (nl); 90P97; Lin.ptd Page 6 200421880 V. Description of the invention (2) Joint technical committee is committed to the development of video and audio compression and multi-channel transmission. These standards specify the compression bit The syntax and decoding method of the metastream, but for the algorithm used by the encoder, it retains a considerable amount of freedom for the novelty and diversity of the encoding. According to MPEG, a series of video diurnal pictures are divided into a series of diurnal groups (G0P), where each G0P starts with I-dimension, followed by P-dimension and B-dimension Figure 1 illustrates a typical set of GOPs in the order shown. The encoding of the I-day plane does not need to refer to the previous or future day plane, the P-day plane refers to the I-day plane or p-day plane closest to the time in the series of video day planes, and B- The picture is interspersed between I-day and P-day. And use the previous, future, or both of the immediate I-day plane and p_picture to encode. Although several B-pictures can appear next to each other in succession, the other day-surfaces must not be estimated from the B-day-surface. Each daylight surface has three components: a brightness value (represented by Y), a red color difference (represented by Cr), and a monitor color difference (represented by Cb). For the MPEG 4: 2: 0 format, the sampling points for each cr and Cb component are only half of the γ component in the horizontal and vertical directions. As shown in Figure 2, the basic composition of a MPEG diurnal surface is a large block, expressed in MB). Taking the video of 4: 2: 〇 as an example, each MB contains an array of 16x16 sampling points of the Y component and two blocks of 8x8 sampling points of the Cr and Cb components, where the array of 16x16 sampling points of the Y component is actually composed of It consists of 4 blocks of 8x8 sampling points. The role of the encoder is to determine what type of picture encoding and what kind of prediction

07〇2-7302TWf (nl); 90P97; Lin.ptd Page 7 200421880 V. Description of the invention (3) The test mode is the best. For each I-picture, each 8x8 block in MB is subjected to a discrete cosine transform (DCT) to form an array of 8 x 8 conversion coefficients. The conversion coefficients are then quantized by a quantization matrix and then zigzag ( Zig-zag) scans the quantized results of the DCT coefficients to obtain a series of DCT coefficients, and the DCT coefficient sequence is encoded with a variable length code (VLC). p—day and night must be determined ^ Will each 0 be a type 0 or? Type 0 is coded. The coding of type 丨 is done in this way. For each P_, we need to get the prediction made by the picture. This prediction is based on- The prediction errors between the estimated Mβ are DCT, quantization, and z;;, the estimated Mβ and the head "B code. When transforming the Z-shaped image and VLC to process the B-day, you must make a decision 雠:! Mode, F mode, B mode, and any mode to encode each body without the use of motion compensation (such as! Type I. I mode uses MB-based forward prediction coding, which is based on the previous book β-like); F The mode is one-way type MB in general. On the other hand, the B mode is based on the prediction of backward motion compensation (such as the day-to-day motion compensation from P to get the ^ estimated j special backward prediction encoding, which is the backward prediction encoding. The former $ other is the FB mode, which is obtained by double interpolation. ≪ Motion compensation estimates are both for the F, B and FB modes. Estimation. Shape scan and VLC encoding. To use DCT, quantization, z-code encoder needs to be the whole day and time to get the order in the given bit.

0702-7302TWf (nl); 90P97; Lin.ptd 200421880 V. Description of the invention (4) There is no order in the control of the quantization rank order at the element rate. The system where the determinant is important is the intelligent element number, which makes the k South coding is quite complicated. Considering single-shot, live video compression and installation. mr will not know the actual number of bits used by the selected code / Zhang Dan face until after the actual editing. A reversal function can give the desired number of quantizations. The actual number of bits used in each picture,- The ir port of this 'video 1' is a bit rate control. The master of the bit rate control wisely allocates the bit code used to encode each day face and each dragon. When the decoder decodes it, it can be as good as possible. However, traditional bit rate control methods usually need to be performed several times to complete the video encoding. A novel bit rate control technology is urgently needed, which can be used in video encoders. Furthermore, a dynamic video encoding method is also expected. Bit-rate control method for picture frame-level [Summary of the Invention] According to the present invention, the preparation of the first and the last day of the day code encoding. The bit score S 'is based on the analysis of the activity. The current picture of the 夂 Π ϋ code is pre-divided and the previous code is analyzed in advance. The amount of pre-analyzed activity is an estimate of the quality information of the current code. f Μ 地 八: The encoder is very useful, it can give the target bit quota of plane i to each day plane, and can achieve more average visual quality between different planes.

0702-7302TWf (nl); 90P97; Lin.ptd

Bill m page 9 is for a kind of full-volume activity that is encoded in a video to estimate the complexity of the previous picture on the complex day-to-day surface. The current momentum is proportional to the reversed level. The present invention includes a movement and a more continuous parameter in the diurnal plane, that is, when the block is matched. The amount of activity is complex with the complex picture. This set of continuous instantaneous complexity signal bit rates The control of the calculation of the continuous continuous diurnal plane of the full-lived diurnal plane is the same as the estimated current diurnal continuous distribution of the group. A complexity estimation unit is connected to the current day surface, and the complexity of the same day is estimated in the full-continuous day surface of the previous picture, and the bit rate is given. 5. Description of the invention (5) The present invention is The current diurnal plane encodes the diurnal plane in the current diurnal plane, and it is based on the complexity of the mesh; the degree of mesh complexity and the average ratio of the diurnal plane of the current diurnal plane in the instantaneous sequence. A device that averages the other party's system. A set of the frontal dispatcher is connected with the motion estimation based on the current day code. The current day code is used to estimate the complexity of the current head dispatcher and the sequence of the dynamic image based on the current picture. The ratio of grouping complexity is more complex than the standard quota; therefore, it is based on coding. The current day-to-day calculation of current day-to-day activity is compared with the present. Also revealed a ^ estimation unit, new device. Move the to be coded and calculate the ratio, degree, of this item and the set of connectedness. The moment of the current picture, the method of assigning the target system, momentum, which is medium; then the moment of the complexity of the previous face of the basic type is the estimated degree of repetition. After the video, the The ratio of the bit rate to the current bit rate controller, a video sequence is used to perform the amount of activity. The basic type of pre-processor can therefore be used with complexity, based on the estimated current picture. 200421880

The parameter update is based on the current number of book positions and the current diurnal surface = = momentum, the actual consumption of the current diurnal surface, and the ratio of its activity to complexity. The advantages can be more obvious and easy to understand, and in conjunction with the accompanying drawings, a detailed description is provided. In order to make the above-mentioned following of the present invention a preferred embodiment is given below:

Called: Khan. For prediction, the diurnal plane and P-diurnal plane must first be edited in mpeg J Zhai noon code 'by calculating the root mean square error between the original diurnal plane and the decoded diurnal plane to obtain the decoded picture. A pen-based measure of its quality. Taking the root mean square error as the distortion of the decoding day, the complexity of decoding the written complex-C is defined as follows: C = r X d where r is the bit rate required to encode the day and d is the decoding The degree of distortion of the day. In theory, there is a proportional relationship between the average quantization level (qUantizati〇n step s i z e) and the degree of distortion, so the complexity of the picture can be defined as:

0702-7302TWf (nl); 90P97; Lin.ptd page 11 200421880 V. Description of the invention (7) Among them, will be able to know the degree of the prior art of the day surface and the degree of heterogeneity of the day surface, and the same as the encoding form, Then, if the video is sequenced into a consistent view q, the average quantization bit rate (actual consumption bits-bits of white) of the picture. The complexity is also obtained after day-time encoding. The number of digits and the average quantization level The complexity depends on the local surface of the day, using the recently edited version, encoding and encoding. I-, and B- octave of octave to indicate the effect of the current picture. If the video ^ don't keep its complexity to reduce the number of ways that can reach 5 | 丨 ^ ^ τ, the content of the day is smooth. "Shi" arrived pretty good ^ ^ ^ bit quota and straight real ^ $ a / wenguo. However, due to the inconsistency between the number of digits consumed by the day and time, the method of addiction is not suitable for reaching scallops. According to the present invention, 'analyze the current investigation in advance; A said: .. U mouth month U 畺 surface activity (a C ti ν ity) and the relationship between the actual complexity of the screen, the current day complexity Will be able to take this estimate. Activity amount is a measure of its bit rate and quality after the picture is encoded. 'Assuming that the full amount of activity A of a whole day is proportional to the complexity C, then A = k XC ^ X r X q = k ^ xr xa 2 丄 ^ where k is a proportional constant. If k 'is the activity-to-complexity ratio (ACR), then A in the whole activity can also be expressed by the following formula: A = ACRxr ^ < g According to the present invention, the same type State of the previously encoded picture to estimate ACR. Conceptually, first calculate its full activity A in front of the code / Zhang Tian, and then

0702-7302TWf (nl); 90P97; Lin.ptd Page 12 200421880

0702-7302TWf (nl); 90P97; Lin.ptd Page 13 200421880 V. Description of the invention (9) The rule of the Video Buffer Verifier (Video Buffer Verifier, VBV), the allocated target quota must be limited so that the VBV buffer does not Will overflow or underflow. When the target bit quota of the current picture is determined, many different types of image encoders, such as Test Model 5 described in the MPEG-2 standard, can be used to complete the daytime surface according to the target bit quota. Compression. At present, after the encoding of the daytime plane is completed, its actual complexity will be known ', and the relationship between the full activity of the current picture and the actual complexity, ACR⑴ can be calculated from the following to q ACRU) = -ii (〇AQ (l) χ [/ 3 (0, where ACR⑴ is proportional to the full activity A (υ, but inversely proportional to the actual number of bits UB (1) and the average quantization level correction of the current picture. This ACR⑴ can be taken Estimate the complexity of the next diurnal surface in the same split state. ACR⑴ can be linearly combined with 乩 ... ⑴ to avoid the influence of the noisy rich diurnal surface. The single-pass (Singie_pass) video coding invented by the scholar can be obtained by Comparison of FIG. 3: An example and the operation flowchart of FIG. 4 are used to illustrate: The cipher device 300 includes-motion estimation single lake-and-wheat image; DO with jaw dispatcher 3 30,-parameter updater 340 movement In front of the estimated block, Α (1) (step S410). Based on the full activity; the full activity volume of m, Chery Λ, and the continuous diurnal plane of group XI are the same as on page 14 〇07〇2-73〇2TWf (ni ); 9〇p97; Lin.ptd 200421880 V. Description of the invention (10) The J-coded daytime surface and its' complexity estimator 32 can be used to estimate the target The complexity CS of the picture (step S420). The quota dispatcher 33 uses the estimated complexity ct to update the instantaneous complexity of this group of day-to-day planes—c 22 and allocate the target bit quota according to "and inst-c" — Z-Μ ^ Β-! Γ ^ ^ S44〇) 〇 ^ ^ E'350 ^ ^ § ^ Decrease the TB level to determine the quantization level currently used in the day time. These quantization bits are used as each The use of a spatial area coding: EG = σ This inter-work area refers to a large block; according to these internalization levels determined by μ⑴, the image encoder 3 5 0 encodes the current day surface ρ⑴ (S450), and returns the actual The number of consumed bits _⑴ and _ give the parameter f a newer 340. Based on the full activity Α⑴, the actual number of consumed bits: two and the average-Lihua rank AQ.) 'Parameter updater 340 is the current day surface P (〇 Calculate ^ its activity to complexity ratio ACR⑴ (step S46). — Equivalently, the preferred embodiment of FIG. 3 can be implemented by software. According to the present invention, the mobile estimation unit 31 3 And the figure = = 1 yuan and two can, the pipeline (P1PeUne) mode operation, starting in the copy of Yi 320, Ye Ye currently face Prior to the complexity, ㈣Estimation Unit Chuan: Ϊ ΐ Ϊ into the calculation and estimation of the current day's full activity that will be coded, and 'when the mobile estimation unit 310 is the next sheet = Bei Ai Complexity Estimator 3 2 0 and other components are still busy: everyone is concerned about the operation. Next, each component in the example will be used. One of the main purposes of the mobile estimation unit 31 is to determine what prediction to use. Page 15 0702-7302TWf (nl); 90P97; Lin.ptd 200421880 V. Description of the invention (11) Mode to encode each BM in a daytime plane, and if necessary, forward and backward movement prediction , Can also extract the information of day-to-day activity from the block matching operation. First, calculate the intra-activity of each MB, and divide the pixel intensities of 4 8x8 luminance blocks in a 〇 to 111,11'11 [1 :: = 〇, ..., 7, ] 1 = :: 0, ..., 7, and the average value of each 8 and 8 blocks is Γ, then the activity in each μ B I ntra A ct: 3

IntraAct = where

If a lower computational complexity is required, it can be replaced by the absolute difference of f:

IntraAct = lAk where = Σ Σ;-7 m = 0? 2 = 0 is the ‘live 2 form. I kernel form of the I-day surface, so htraAct is estimated. It is most commonly used for non-self-encoding. If the diurnal plane is P- or B-diurnal plane, the technique to find the best motion vector is block matching.

200421880 V. Description of the invention (12) (nonintra coding) The standard is the number of variations or absolute distortion. Values: and ^ day face), using the forward-to-backward MB prediction, the two-way prediction or the minimum required 'option to select the MB mode forward J MB, at each time. Once the number of variations in P_ or Bu day surface can also be calculated, the difference between the pixel-to-pixel difference between the 4 and 8 blocks in the 2 ^ 2 compensation difference = = the absolute value of the distortion and the addition i; The change of the 8x8 block ... It means that K pays for each MB in the non-intra-coded daytime plane + ^ aetlVlty) 'InterAct, and then compares the IntraAct and InterAct of the parent MBs in the non-intra-coded daytime plane to compare Determine whether i ^ erAct is small. If it is, use InterAct as the Mβ activity to encode the MB in mutual mode (lnter_m〇de); otherwise, use it as the MB's activity and use its own mode (intra_m〇de). ). Finally, for the current day, day, or day, the activities of all willows are added together to obtain a full activity A⑴ ', the mobile estimation unit 31, and then the full activity A (n) is transmitted to the complexity estimator 32. And the parameter updater 34. Next, the complexity estimator 32 0 estimates the complexity of the current day surface ^^ for a certain type, and according to the three day surface types, the weighting coefficient is advanced to the estimated ^ complexity. Coincidentally, since it is impossible to estimate other daytime planes with the B-picture, the weighting coefficient of the B-daytime plane can be reduced to allocate fewer bits to the daytime plane and retain more bits to I- and P. -Diurnal plane; generally speaking, encoding the diurnal plane will produce many bits, so the weighting coefficient of P-diurnal plane is smaller than the weighting coefficient of the diurnal plane. The complexity estimator 3 2 0 is updated according to the current diurnal plane type. the complexity

200421880 V. Description of the invention (13) One of CP or CB. The complexity of the current day surface P (1) ^〗 丨 Estimated as follows: if (I-day surface) ^ (0 0esf A (〇 Cr = KrX -γ—ΓΤ 1 1 ACRf ~ l) else if (P- 天 面)

_ y one Up one 厶 P

XACRfTJ else if (B-day surface) 0 b Cs = Ksx A (i) ACR ^ l) where, and '4C /? Fu is a previously coded day surface of type I, P, and B in a set of continuous day surfaces The ratio of respective activities to complexity. These H υ and 乂 α? Γ; are stored in the parameter updater 340, and the complexity estimator 3 2 0 will read the corresponding amount of activity to complexity for the previous type of the previous day. I, Κ and Β are weighting coefficients of I-, P-, and B-, respectively, and their ranges are generally between 0 and 1.0. As for the I-day surface, the preferred embodiment can use I = 1 · 0. When β is received, the quota dispatcher 3 3 0 updates the instantaneous complexity INST_C for the group of continuous daytime planes and allocates the target bit quota TB (1) to the current daytime plane P (1), and updates the instantaneous complexity INST_C. as follows:

0702-7302TWf (ni); 90P97; Lin.ptd page 18 200421880

V. Description of the invention (14) INST _C = NIxCI + NpxCp + NBxC3 where the number, NP and NB are I-, p-and b in the continuous diurnal plane of the group. Furthermore, the target bit quota of the current picture P (1) TB (i) is TB (i) =

INST C where 'n is the number of continuous diurnal planes in this group, f is the number of diurnal planes per second, that is, the frame rate (frame rate), and R is the expectation of continuous diurnal planes in each group ten, τ is too uniform. However, the actual number of bits consumed will not be exactly equal to the expected number of children; therefore, a feedback strategy is developed to make the actual number of bits consumed by the day close to the target bit amount. In the embodiment, the encoding

^ Θ is the amount of overused bits up to J, which can be amortized by the current daytime being coded:

TB (i) = TB (i)-JLRxEB where EB is the over-bit amount transmitted by the parameter updater 340, and AR is the predetermined amortization rate, and its range is generally from 0.5 to 0.2 between. The quota dispatcher 3 3 0 must adjust the target bit quota TB⑴ to comply with the VBV specification, so it also sets the upper limit (U-boiind) and lower limit (L-bund) of the quota. For constant bitrate (CBR) operations, the target bit quota allocated to a daytime plane must be such that the VBV buffer will not overflow or be scarce, so the target bit quota TB⑴ is limited to the upper and lower limits. In the range: if (TB (i) > U —bound) then TB⑴—bound if (TB⑴ < L —bound) then TB⑴ = L —bound If it is a variable bitrate (VBR) operation, only

200421880 V. Description of the invention (15) One " --------:-To prevent VBV from being short of hair, so: Mengde if (JB:> u-bound) then TB (1) = u ' _d…, after that, the target bit quota TB (n will be transmitted to the spring image encoder 3 5 0. The number is updated to 3 4 0 and the video is received == 35 () from the mobile estimation unit 310 through the signal line 312 Connect U and each MB's motion vector and MB mode. In order to maximize the image, the encoder 3 50 determines the quantization level used to encode each mb of the Muli picture according to the target bit amount " ^. Based on the data, the image encoder 350 starts to encode the current diurnal plane, and outputs an encoded data CD. After the current diurnal plane, the image encoder 350 averages the quantization levels and calculates the actual consumed bits. Unit number / UB (1), and then return the current picture υβ⑴ and the average quantization level ⑴ to the clip number updater 3 4 0. The difference between the target bit quota TB and the actual number of consumed bits of the diurnal plane P⑴ will be Accumulation is performed by the parameter updater 340 so as to obtain the super-used bit amount EB after daytime ρ⑴ encoding: EB-EBx (l-AR) + UB (i)- TB (i) Among them, AR is a predetermined amortization rate. Therefore, the relationship between the amount of activity and the actual complexity, ACR⑴, can be calculated from the following ACR (i) =: A (i) AQU) x UB {i ) Complexity. In order to make use of the preferred embodiment, this ACR (1) can be used to predict the same type of next diurnal surface ACR (l) will not be affected by noise-rich pictures.

200421880 V. Description of the invention (16) Linear combination of ACR (1) and ACRd-1), such as if (I-picture)

= ACRa-; χ cwy ACr (i) X CW else if (P ~ day surface)

= ACR (; ~ l) X (l-cw) + ACRa) X CW else if (B- 天 面) "4〇βί; ACR (J'l) (l-CW) + ACR (i) x CW /, The predetermined weighting coefficient of the CW 仏 linear combination. Updated and typed written work; Biography; :: Complex: ΪΓ Counter 320 to make a bit for the next one :, the extra amount of extra bits will be sent to the quota Distributing Although the present invention has been disclosed as above with a specific embodiment, it is easy to lack and clarify the technical content of the present invention, but not to narrowly limit the present invention to you. Anyone skilled in this art will not depart from the present invention. J: and within the scope, when you can make a few changes and retouching :: Application scope Dang depending on the protection of the scope of the patent application attached at the end of page 21 0702-7302TWf (nl); 90P97; Lin.ptd 200421880 Figure Brief description of the formulas Figure 1 shows a typical group of pictures (GOP) in the order of display; Figure 2 is a large block of MPEG; Figure 3 is a block diagram of a bit rate control device of a preferred embodiment of the present invention The intention, and FIG. 4 are flowcharts of the operation of the present invention. Symbol description 3 0 0 ~ Motion video encoder; 310 ~ Motion estimation unit; 3 1 2 ~ Signal line; 3 2 0 ~ Complex estimator; 3 3 0 ~ Quota dispatcher; 3 4 0 ~ Parameter updater; 3 5 0 ~ Image encoder; P (i) ~ Day surface; A⑴ ~ Full activity amount; ~ Estimated complexity; ACR (i) ~ Ratio of activity amount to complexity; EB ~ Over-use bit amount; TBm ~ Target bit quota; AQ (1) ~ average quantization level; UB (i) ~ actual number of bits consumed; CD ~ encoded data.

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Claims (1)

200421880 VI. Application steps: A method for controlling the bit rate of a moving image video, including at least the next full-time activity calculated for the current daytime plane to be encoded. Group of continuous diurnal planes: Medium; Based on the ratio of the amount of activity to the complexity of the previously coded diurnal planes in the group of continuous pictures and one of the same type of sadness in the group of continuous pictures, it is estimated that one of the current diurnal planes is complex Update the instantaneous complexity of the set of continuous pictures with the complexity estimated by the current daytime plane; allocate a target bit quota to the current daytime plane based on the estimated complexity and the instantaneous complexity; the video The current day surface in the sequence is coded based on the target bit quota; and the current quantity and the level of the current day surface are encoded to calculate the item, in which the number of full activity elements of the current day surface and the average quantization 2 _If the method of applying for a patent system, the current picture is shifted. 3.If the method of applying for a patent system, the actual picture of the previous screen disappears It is proportional to the rank and range. The above dynamic estimation range is described. Allocate a π denier W < 坌 坌 坌 |} The number of bits and the current day-time average i. The ratio of the amount of activity to the complexity. The amount of activity to the complexity. The ratio of degrees is inversely proportional to the item. Consecutive Consumption of Surface I {1 The motion picture described in item 1 is based on the current writing, +, X α position control time. The above 34 full activity amounts are in Mulu of the moving picture described in item _1, the bit rate of the news, and the 7-membrane quota. The above is the current amount; 0702-7302TWf (nl); 90P97; Lin.ptd page 23 200421880 VI. Patent application scope = is proportional to the above-mentioned group of continuous pictures of the above-mentioned transient system 11 application patent scope of the motion picture video bit Yuan rate control calculation '..., where the above step of estimating the complexity is based on a formula where Cest is the weighted value of the current picture estimated above, and the range is between 0 and 丨, A Sun said post-hybrid degree' K system A predetermined above-mentioned full-time activity of the current day surface, the above-mentioned previously coded day ACR of the same type of the above-mentioned group of continuous day-planes t is the above-mentioned group of continuous pictures. Degree ratio. The manufacturing method, wherein the above-mentioned group of moving images video bit rate control (group of Picture, Gop), the daytime surface includes at least one daytime surface group standard. And the diurnal group complies with MPEG video 6. A kind of moving image video bit -... a motion estimation unit, receiving: rate control device, at least including: a group in the current diurnal view sigma sequence to be encoded For continuous day-to-day matching, calculate the block of the current day-to-Z to perform a motion estimation in a block-complexity estimator, based on: total = momentum; two of the same type in this group of continuous day-to-day = ^ before the picture The ratio of the full activity amount and the degree is used to estimate the current day-to-day coded day-to-day activity amount to the complex-quota dispatcher, with the objective = a complexity; one instantaneous and complex day-to-day estimation of a group of continuous pictures The complexity is more Jin ', which is used to estimate the complexity based on 200421880 200421880 6. The scope of patent application. Among them, Cest is the above estimate of the current picture. "The above complexity, K is a predetermined weighting value, and its range is from 0 to 1. A is μ, +, ^ ^ ^ * ΛΑ. ,,, The above-mentioned full activity of the above-mentioned day-plane in the above-mentioned set of Lian Bin pictures, Arp γ, ^ ^ * jr- is the above-mentioned previously-encoded day-day dragon of the same type in the above-mentioned series 、,, n ^ ^ ”/ Tongue momentum to complexity ratio 0 Scrape W Λ Range The device for controlling the bit rate of the moving image video as described in item 6 above, wherein the above set of continuous diurnal planes includes at least one diurnal plane group ( group 〇f picture (G0P), and Xi + ^ A Bing, Shi i day and day group in line with the MPEG video standard. 1 士 1 _ as described in the Shen Qian Patent Qianwei 7 bit rate control The device 'wherein the above-mentioned spatial area in the current day is a macroblock defined by the video standard. 0702-7302TWf (nl); 90P97; Lin.ptd Page 26