CN102316319A - Adaptive video coding/decoding method, decoder and audio/video playback system - Google Patents
Adaptive video coding/decoding method, decoder and audio/video playback system Download PDFInfo
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Abstract
The present invention provides a kind of adaptive video coding/decoding method, decoder and audio/video playback system, and wherein, the complicacy self-adaptive Video Decoder comprises: a plurality of elements are used to carry out a plurality of operations relevant with video decode; And the decoding complex degree manager, be used for carrying out the decoding complex degree management based on the bit stream information of incoming bit stream, whether reduce the decoding complex degree of at least one element in the complicacy self-adaptive Video Decoder with decision.Utilize complicacy self-adaptive Video Decoder of the present invention can reduce decoding complex degree adaptively, thereby reduce decoding workload and corresponding power consumption, be the very big flexibility that realizes that the digital video Play System provides.
Description
Technical field
The present invention is relevant for a kind of adaptive video (adaptively performing video decoding) method of decoding, especially relevant for a kind of adaptive video coding/decoding method, complicacy self-adaptive Video Decoder (adaptive complexity video decoder) and adaptive audio/audio/video player system.
Background technology
When the terminal use is in when using household audio and video system to watch video frequency program; The coded data of video frequency program is decoded with on the display screen that is presented at household audio and video system, and the decoded result of coded data can enlarge or dwindle with the size that meets display screen and the requirement of resolution.Usually, how complicated regardless of the algorithm that coded data is decoded, also no matter whether video frequency program is high-resolution, the decoding device of household audio and video system can be decoded to coded data easily.
For the terminal use, have that can to watch the portable electron device of same video frequency program anywhere be very easily, this portable electron device for example mobile phone or personal digital assistant (Personal Digital Assistant, PDA).Yet (Research and Development, R&D) team some problems possibly occur when this portable electron device of design when the research and development of manufacturer.For example, too under the too high situation of the resolution of complicacy and/or video frequency program, the decoding capability of portable electron device might be not enough at the algorithm that coded data is decoded.Again for example, when the one or more treatment circuits in the portable electron device were operated in the highest available work frequency, power consumption might be too high.Therefore, need high efficiency and cost effective Video Decoder, so that have the video that to accept quality with portable electron device broadcast with finite computational abilities.
Summary of the invention
In view of this, the present invention provides a kind of adaptive video coding/decoding method, complicacy self-adaptive Video Decoder and adaptive audio/audio/video player system.
The present invention provides a kind of adaptive video coding/decoding method; Comprise: based on the bit stream information of the incoming bit stream of complicacy self-adaptive Video Decoder; Whether execution decoding complex degree management reduces in the complicacy self-adaptive Video Decoder decoding complex degree of at least one element in a plurality of elements with decision; And selectivity reduces in the complicacy self-adaptive Video Decoder decoding complex degree of a part of element in a plurality of elements.
The present invention provides a kind of complicacy self-adaptive Video Decoder in addition, comprising: a plurality of elements are used to carry out a plurality of operations relevant with video decode; And the decoding complex degree manager, be used for carrying out the decoding complex degree management based on the bit stream information of incoming bit stream, whether reduce the decoding complex degree of at least one element in the complicacy self-adaptive Video Decoder with decision; Wherein, decoding complex degree manager selectivity reduces in the complicacy self-adaptive Video Decoder decoding complex degree of a part of element in a plurality of elements.
The present invention also provides a kind of adaptive audio/audio/video player system, comprising: audio decoder is used to carry out audio decoder to produce audio-frequency information; And Video Decoder, be used to carry out video decode, wherein, Video Decoder comprises the decoding management device, the decoding management device postpones the voice playing of audio-frequency information according to the bit stream information of incoming bit stream.
Adaptive video coding/decoding method provided by the present invention, complicacy self-adaptive Video Decoder and adaptive audio/audio/video player system can reduce decoding complex degree adaptively; Thereby reduce decoding workload and corresponding power consumption, be the very big flexibility that realizes that the digital video Play System provides.
Below for according to a plurality of diagrams preferred embodiment of the present invention is described in detail, the those skilled in the art should clearly understand the object of the invention after reading.
Description of drawings
Figure 1A is the block schematic diagram according to the complicacy self-adaptive Video Decoder of first embodiment of the invention.
Figure 1B is the block schematic diagram according to the complicacy self-adaptive Video Decoder of first embodiment of the invention.
Fig. 1 C is the block schematic diagram according to adaptive audio/audio/video player system of first embodiment.
Fig. 1 D is the block schematic diagram according to the complicacy self-adaptive Video Decoder of second embodiment of the invention.
Fig. 1 E is the block schematic diagram according to adaptive audio/audio/video player system of second embodiment.
Fig. 2 is the flow chart of adaptive video coding/decoding method according to an embodiment of the invention.
The certain operations sketch map that Fig. 3 can trigger for decoding complex degree manager according to an embodiment of the invention.
The correlated quality of certain operations/step that Fig. 4 can trigger for decoding complex degree manager according to an embodiment of the invention and the sketch map of processing speed.
The correlated quality of certain operations/step that Fig. 5 can trigger for decoding complex degree manager in accordance with another embodiment of the present invention and the sketch map of processing speed.
The sketch map of certain operations/step that Fig. 6 can trigger under different situations for decoding complex degree manager in accordance with another embodiment of the present invention.
Embodiment
In the middle of specification and claim, used some vocabulary to censure specific components.The person of ordinary skill in the field should understand, and same assembly may be called with different nouns by manufacturer.This specification and claim not with the difference of title as the mode of distinguishing assembly, but with the difference of assembly on function as distinguishing criterion.Be open language mentioned " comprising " in specification and the claim in the whole text, so should be construed to " comprise but be not limited to "." roughly " for refer to that in acceptable error range those skilled in the art can solve the technical problem, and reach said technique effect basically in certain error range.In addition, " couple " speech and comprise any indirect electric connection means that directly reach at this.Therefore, be coupled to one second device, then represent this first device can directly be electrically connected at this second device, or be electrically connected to this second device through other device or the intersegmental ground connection of connection hand if describe one first device in the literary composition.The specification subsequent descriptions is the preferred embodiments of embodiment of the present invention, and so this description is to explain that rule of the present invention is purpose, to be not to be used to limit scope of the present invention.Protection scope of the present invention is as the criterion when looking the accompanying claims person of defining.
With reference to Figure 1A and Figure 1B, Figure 1A and Figure 1B are the block schematic diagram according to the complicacy self-adaptive Video Decoder 100 of first embodiment of the invention.Complicacy self-adaptive Video Decoder 100 comprises quick variable length decoding (Variable Length Decoding; VLD) with inverse quantization module 110, inverse transformation (inverse transform) unit 120, motion compensation (Motion Compensation; MC) module 130 (in Figure 1A, being labeled as " MC module "), computing unit 140, reconstruction frames output unit 150 and frame memory cell 160; Wherein, For example inverse discrete cosine transform of inverse transformation unit 120 (Inverse Discrete Cosine Transform, IDCT) unit; Motion compensating module 130 comprises time prediction unit 132 and spatial prediction unit 134; Computing unit 140 is adder for example; Reconstruction frames output unit 150 comprises (de-blocking) filter that deblocks, for example loop filter (in-loop filter) 152; And frame memory cell 160 frame buffer for example.Especially, aforesaid deblocking filter (for example loop filter 152) is the complicacy self-adaptive deblocking filter.Note that and can time prediction unit 132 and spatial prediction unit 134 be called inter prediction (inter prediction) unit and infra-frame prediction (intra prediction) unit respectively.Shown in Figure 1B, complicacy self-adaptive Video Decoder 100 further comprises scaler (resizer) 170, the adjustment of demonstration time driver 175, display buffer 180 and decoding complex degree manager 100M.Wherein, decoding complex degree manager 100M can adopt hardware to realize, also can adopt software to realize.According to one embodiment of the present invention; The internal structure of decoding complex degree manager 100M is configurable to be hardware calculator/processor; Be used to calculate the decoding complex degree that the audio/video playback system can allow, and the decoding complex degree of complicacy self-adaptive decoder 100 adjusted according to result of calculation.For example this calculator/processor is alternative reduces in the complicacy self-adaptive Video Decoder 100 decoding complex degree of at least a portion element in a plurality of elements.Yet below only be used for illustration purpose, the execution mode of decoding complex degree manager 100M is not as limit.
According to this embodiment; Fast variable length decoding and inverse quantization module 110 are used for incoming bit stream 108 is carried out quick VLD and inverse quantization producing a plurality of inverse quantization results 118, and inverse transformation unit 120 is used for a plurality of inverse quantization results 118 execution inverse transformations to produce a plurality of inverse transformation results 128.In addition; Motion compensating module 130 is used for carrying out motion compensation according to incoming bit stream 108, and produces corresponding a plurality of prediction output result 138, wherein; Time prediction unit 132 is used for the time of implementation prediction, and spatial prediction unit 134 is used to carry out spatial prediction.Shown in Figure 1A; Computing unit 140 is used to add up to a plurality of inverse transformation results 128 and a plurality of prediction output results 138 to export results 148 to produce a plurality of compensation; And reconstruction frames output unit 150 is used to produce a plurality of reconstruction frames 158, and wherein spatial prediction unit 134 is carried out spatial prediction according to the data reconstruction of reconstruction frames output unit 150 outputs.In addition, frame memory cell 160 is used for storing at least a portion of a plurality of reconstruction frames 158, and wherein, time prediction unit 132 is according at least a portion time of implementation prediction of aforesaid a plurality of reconstruction frames 158 temporarily.
With reference to Figure 1B, scaler 170 is used for carries out image convergent-divergent whenever necessary (for example amplifying or downscaled images).Under the situation of carries out image convergent-divergent, a plurality of picture frames 178 comprise the zoom version of a plurality of reconstruction frames 158.Under the situation of carries out image convergent-divergent not, a plurality of picture frames 178 comprise a plurality of reconstruction frames 158, that is, and and a plurality of reconstruction frames 158 of scaler 170 bypasses (bypass).In addition, display buffer 180 is used for storing a plurality of picture frames 178 temporarily.Under the control of demonstration time adjustment driver 175, output is stored in a plurality of picture frames 178 in the display buffer 180 as a plurality of output frames 188 temporarily, to be presented on the appropriate time point corresponding to the voice playing of audio-frequency information.Therefore, adjust driver 175 through using the demonstration time, but the broadcast of the Voice & Video of complicacy self-adaptive decoder 100 isochronous audios/audio/video player system (not showing among Figure 1A and Figure 1B), with the delay (if existence) of eliminating video decode.For example, when having heavy video decode workload, the delay of video decode may take place.In addition, decoding complex degree manager 100M can carry out the decoding complex degree management based on incoming bit stream 108 with from the display buffer state of display buffer 180.For example, decoding complex degree manager 100M is alternative reduces in the complicacy self-adaptive Video Decoder 100 decoding complex degree of a part of element in a plurality of elements.More specifically; Decoding complex degree manager 100M can be according to incoming bit stream 108 and aforesaid display buffer state; Produce a plurality of control signals; For example control signal C1, C2, C3, C5, C6 and C7 are to control the decoding complex degree of respective element in the complicacy self-adaptive Video Decoder 100 respectively.For example; Shown in Figure 1A and Figure 1B, variable length decoding and inverse quantization module 110 are controlled by control signal C1 fast, and inverse transformation unit 120 is controlled by control signal C2; Motion compensating module 130 is controlled by control signal C3; Reconstruction frames output unit 150 is controlled by control signal C5, and aforesaid deblocking filter (for example loop filter 152) is controlled by control signal C6, and demonstration time adjustment driver 175 is controlled by control signal C7.
Especially; At least a portion of complicacy self-adaptive Video Decoder 100; For example time prediction unit 132, spatial prediction unit 134, inverse transformation unit 120, reconstruction frames output unit 150 and/or VLD and inverse quantization module 110 fast; Can operate according to the resolution of a plurality of reconstruction frames 158, rather than only operate, to reduce the complexity of decode operation according to the resolution of a plurality of primitive frames of incoming bit stream 108 representatives.Can for example,, for example select the lower right corner pixel of each 2 * 2 block of pixels through frame down-sampling (down sampling) being obtained the frame that resolution reduces through selecting specific pixel each block with representative frame.In one embodiment, time prediction unit 132 can be operated according to the resolution of a plurality of reconstruction frames 158, rather than operates according to the resolution of a plurality of primitive frames, to reduce the complexity of time prediction.For example, at least a portion information of time of implementation prediction can further be estimated to can be used in the abridged partial information in time prediction unit 132.In addition, spatial prediction unit 134 can be operated according to the resolution of a plurality of reconstruction frames 158, rather than operates according to the resolution of a plurality of primitive frames, to reduce the complexity of spatial prediction.For example, spatial prediction unit 134 can further estimate to can be used for carrying out in the abridged partial information at least a portion information of spatial prediction.According to this embodiment, inverse transformation unit 120 can be operated according to the resolution of a plurality of reconstruction frames 158, rather than operates according to the resolution of a plurality of primitive frames, to reduce the complexity of inverse transformation.For example, inverse transformation unit 120 can be through selecting one of a plurality of predetermined counter-transformation function FIT that the are used for inverse transformation part with a plurality of calculating of omitting inverse transformation.In addition, reconstruction frames output unit 150 can be operated according to the resolution of a plurality of reconstruction frames 158, rather than the resolution of a plurality of primitive frames operates, to reduce the complexity that produces a plurality of reconstruction frames.Based on whether satisfying one or more conditions, loop filter 152 can be carried out loop filtering corresponding to a selectivity in a plurality of levels of complexity and be used to deblock, and wherein, deblocking operation can for example all deblock, partly deblock and skip (skip) and deblock.In addition, variable length decoding and inverse quantization module 110 can be operated according to the resolution of a plurality of reconstruction frames 158 fast, rather than operate according to the resolution of a plurality of primitive frames, to reduce the complexity of carrying out quick VLD and inverse quantization.More particularly; For reducing complexity; Variable length decoding and inverse quantization module 110 can be used the look-up table that comprises master meter and at least one sublist (for example one or more sublist) during decoding fast; Wherein, because the preset arrangement to look-up table in design phase of complicacy self-adaptive Video Decoder 100, the probability that uses master meter is greater than the probability that uses at least one sublist.
According to some distortion of this embodiment, at least a portion element of complicacy self-adaptive Video Decoder 100 can omit the partial information that this at least a portion element need be handled, and to reduce incoming bit stream 108 is carried out complexity of decoding.For purpose of brevity, the similar description of relevant this type of distortion no longer repeats here.
Fig. 1 C is the block schematic diagram according to adaptive audio/audio/video player system 50 of first embodiment.Adaptive audio/audio/video player system 50 comprises audio decoder 52 and complicacy self-adaptive Video Decoder 100.Audio decoder 52 is used to carry out audio decoder to produce audio-frequency information 58.In addition, complicacy self-adaptive Video Decoder 100 can be carried out the video decode that is disclosed among first embodiment.Please note; Decoding complex degree manager 100M is used for whenever necessary incoming bit stream 108 being carried out the decoding complex degrees management, and decoding complex degree manager 100M selectivity reduces in the complicacy self-adaptive Video Decoder 100 decoding complex degree of a part of element in a plurality of elements.For example, decoding complex degree manager 100M reduces the decoding complex degree of one or more elements in the complicacy self-adaptive Video Decoder 100.Again for example, decoding complex degree manager 100M postpones the voice playing of audio-frequency information 58, and does not reduce the decoding complex degree of any element in the complicacy self-adaptive Video Decoder 100.Therefore; Video Decoder can not decode in time and the situation of a plurality of frames that output and voice playing are complementary under; Decoding complex degree manager 100M is the voice playing of delayed adaptation audio/video playback system 50 suitably, and is synchronous with the video playback and the audio/video playback between the voice playing that keep adaptive audio/audio/video player system 50.Shown in Fig. 1 C, decoding complex degree manager 100M produces whether at least one control signal C0 postpones voice playing and/or the audio-frequency information 58 of audio-frequency information 58 with control the retardation of voice playing.In fact, decoding complex degree manager 100M can be according to the combination of the bit stream information of incoming bit stream 108, the parameter of representing disposal ability and display buffer state or one of them, and decision postpones the voice playing of audio-frequency information 58.For example, according to the combination of the bit stream information of incoming bit stream 108, the parameter of representing disposal ability and display buffer state or one of them, whether decoding complex degree manager 100M decision postpones the voice playing of audio-frequency information 58.Again for example, according to the combination of the bit stream information of incoming bit stream 108, the parameter of representing disposal ability and display buffer state or one of them, the retardation of the voice playing of decoding complex degree manager 100M decision audio-frequency information 58.For purpose of brevity, the similar description of relevant this type of distortion no longer repeats here.
Fig. 1 D is the block schematic diagram according to the complicacy self-adaptive Video Decoder 100-1 of second embodiment of the invention.This embodiment is the distortion of first embodiment.Shown in Fig. 1 D, aforesaid deblocking filter (for example loop filter 152) is placed in outside the reconstruction frames output unit 150 of this embodiment, rather than is placed within the reconstruction frames output unit 150.The enforcement that note that other element (for example quick variable length decoding and inverse quantization module 110, inverse transformation unit 120, motion compensating module 130, computing unit 140, frame memory cell 160) in the complicacy self-adaptive Video Decoder 100-1 can be identical with corresponding elements in the complicacy self-adaptive Video Decoder 100 shown in Figure 1A.In this embodiment, a plurality of elements also can couple with Fig. 1 D among Figure 1B.For purpose of brevity, the similar description of relevant this embodiment no longer repeats here.
According to some distortion of this embodiment, at least a portion element of complicacy self-adaptive Video Decoder 100-1 can omit the partial information that this at least a portion need be handled, to reduce the complexity of decoding incoming bit stream 108.For purpose of brevity, the similar description of relevant this type of distortion no longer repeats here.
Fig. 1 E is the block schematic diagram according to adaptive audio/audio/video player system 60 of second embodiment.Adaptive audio/audio/video player system 60 comprises audio decoder 62 and complicacy self-adaptive Video Decoder 100-1.Audio decoder 62 is used to carry out audio decoder to produce audio-frequency information 68.In addition, complicacy self-adaptive Video Decoder 100-1 can carry out the video decode that is disclosed among second embodiment.Please note; Decoding complex degree manager 100M is used for whenever necessary incoming bit stream 108 being carried out the decoding complex degrees management, and decoding complex degree manager 100M selectivity reduces in the complicacy self-adaptive Video Decoder 100-1 decoding complex degree of a part of element in a plurality of elements.For example, decoding complex degree manager 100M reduces the decoding complex degree of one or more elements in the complicacy self-adaptive Video Decoder 100-1.Again for example, decoding complex degree manager 100M postpones the voice playing of audio-frequency information 68, and does not reduce the decoding complex degree of any element in the complicacy self-adaptive Video Decoder 100-1.Therefore; The voice playing of the suitable delayed adaptation audio/video playback of decoding complex degree manager 100M system 60; Video playback and the audio/video playback between the voice playing to keep adaptive audio/audio/video player system 60 are synchronous, thereby solve any video decode delay issue.Shown in Fig. 1 E, decoding complex degree manager 100M produces at least one control signal, and whether for example aforesaid at least one control signal C0 postpones the retardation of voice playing of voice playing and/or the audio-frequency information 68 of audio-frequency information 68 with control.In fact; Decoding complex degree manager 100M can be according to the combination of the bit stream information of the for example incoming bit stream described in the embodiment shown in Fig. 1 C 108, the parameter of representing disposal ability and display buffer state or one of them, and decision postpones the voice playing of audio-frequency information 68.For example, according to the combination of the bit stream information of incoming bit stream 108, the parameter of representing disposal ability and display buffer state or one of them, whether decoding complex degree manager 100M decision postpones the voice playing of audio-frequency information 68.Again for example, according to the combination of the bit stream information of incoming bit stream 108, the parameter of representing disposal ability and display buffer state or one of them, the retardation of the voice playing of decoding complex degree manager 100M decision audio-frequency information 68.For purpose of brevity, the similar description of relevant this distortion no longer repeats here.
The framework of any embodiment/distortion through using above-mentioned announcement can be adjusted the video decoding complexity of each element.For example; Under the control of decoding complex degree manager 100M, in the complicacy self-adaptive Video Decoder 100 of first embodiment one of (or the distortion of first embodiment) or the one or more elements in the complicacy self-adaptive Video Decoder 100-1 of second embodiment one of (or the distortion of first embodiment) can operate according to more low-level video decoding complexity.Again for example; Under the control of decoding complex degree manager 100M; During the decoding complex degree of any element, all interior elements of complicacy self-adaptive Video Decoder 100 or complicacy self-adaptive Video Decoder 100-1 can not operated according to the video decoding complexity of highest level in decision need not reduce by the complicacy self-adaptive Video Decoder 100 of first embodiment one of (or the distortion of first embodiment) or in the complicacy self-adaptive Video Decoder 100-1 of second embodiment one of (or the distortion of second embodiment).With reference to Fig. 2, more details further describes as follows.
Fig. 2 is the flow chart according to the adaptive video coding/decoding method 910 of one embodiment of the invention.Adaptive video coding/decoding method 910 is applicable to the complicacy self-adaptive Video Decoder 100-1 shown in the complicacy self-adaptive Video Decoder 100 shown in Figure 1A and Figure 1B or Fig. 1 D; More specifically, be applicable to above-mentioned any decoding complex degree manager 100M that embodiment/distortion disclosed.Being described below of adaptive video coding/decoding method 910.
In step S912; Decoding complex degree manager 100M carries out the decoding complex degrees management based on the incoming bit stream 108 of the complicacy self-adaptive Video Decoder (the for example complicacy self-adaptive Video Decoder 100-1 of the complicacy self-adaptive Video Decoder 100 of first embodiment or second embodiment) in considering, whether reduces in the above-mentioned complicacy self-adaptive Video Decoder decoding complex degree of at least one element in a plurality of elements with decision.For example, these a plurality of elements can comprise quick VLD and inverse quantization module 110, inverse transformation unit 120, motion compensating module 130, reconstruction frames output unit 150, aforesaid deblocking filter (for example loop filter 152) and demonstration time adjustment driver 175.
In step S914, the decoding complex degree of a part of element in a plurality of elements in the complicacy self-adaptive Video Decoder described in the decoding complex degree manager 100M selectivity reduction step S912.For example, decoding complex degree manager 100M optionally reduces the decoding complex degree of at least a portion in quick VLD and inverse quantization module 110, inverse transformation unit 120, motion compensating module 130, reconstruction frames output unit 150, aforesaid deblocking filter (for example loop filter 152) and the demonstration time adjustment driver 175 (for example a part or all) at particular point in time.Again for example, decoding complex degree manager 100M does not reduce any one decoding complex degree in quick VLD and inverse quantization module 110, inverse transformation unit 120, motion compensating module 130, reconstruction frames output unit 150, aforesaid deblocking filter (for example loop filter 152) and the demonstration time adjustment driver 175 at another time point.
According to this embodiment; Decoding complex degree manager 100M can be through carrying out the decoding complex degree management with reference to the combination of the bit stream information of the parameter of one or more representative disposal abilities of the display buffer state of display buffer 180, the complicacy self-adaptive Video Decoder described in the step S912 and incoming bit stream 108 or one of them; Wherein, bit stream information can comprise bit rate, resolution and/or frame type.Bit stream information can comprise a plurality of motion vectors, a plurality of residual error (residual), a plurality of IDCT coefficient, bitstream length or obtainable bit stream information in some other instance; Wherein, A plurality of residual errors are direct current (Direct Current for example; DC) value, obtainable bit stream information can be based on for example comparison and/or historical statistics, and the information that is flowed by above-mentioned known bits obtains.In one embodiment, decoding complex degree manager 100M is according to the variation adjustment decoding complex degree of a plurality of motion vectors.Represent the parameter of disposal ability can comprise the statistics of the decode time that each frame is required, for example, the average decoding time that decoding complex degree manager 100M can use each frame is judging current system capability, thus the accommodation decoding complex degree.Especially, decoding complex degree manager 100M can be based on whole execution decoding complex degrees management of the bit stream information of the display buffer state of aforesaid display buffer 180, aforesaid at least one parameter and incoming bit stream 108.
The certain operations sketch map that Fig. 3 can trigger for decoding complex degree manager 100M according to an embodiment of the invention, wherein, these operations are about the decoding complex degree management of adaptive video coding/decoding method 910 as shown in Figure 2.For example, the decoding complex degree manager 100M operation that can trigger comprises: the adjustment of demonstration time, abandon frame, the adjustment of deblocking filter complexity, motion compensation complexity adjustment (in Fig. 3, being labeled as " adjustment of MC complexity "), the adjustment of infra-frame prediction complexity, the adjustment of inverse transformation complexity and VLD complexity and adjust.Based on the combination of the bit stream information of the display buffer state of aforesaid display buffer 180, the parameter of representing disposal ability and incoming bit stream 108 or one of them; Decoding complex degree manager 100M carries out the decoding complex degree management, and optionally triggers one or more in these operations.
The correlated quality of certain operations/step that Fig. 4 can trigger for decoding complex degree manager 100M according to an embodiment of the invention and the sketch map of processing speed; Wherein, these operations are about the decoding complex degree management of adaptive video coding/decoding method 910 as shown in Figure 2.For example; These operation/steps can comprise: standard decoding process, self adaptation bidirectional frame (Bi-directional frame; B frame) (hereinafter to be referred as " B frame ") to deblock (be that self adaptation is carried out all or part of B frame and deblocked or skip the B frame and deblock; Wherein the B frame deblocks and refers to a plurality of B frames are carried out deblocking operations), the B frame simplifies motion compensation (in Fig. 4, being labeled as " the B frame is simplified MC "), fast B frame decoding (for example decoding B frame in the down-sampling territory), abandons B frame, adaptive prediction frame (Predictive frame; P frame) (hereinafter to be referred as " P frame ") (for example deblocks; Self adaptation is carried out all or part of P frame and is deblocked or skip the P frame and deblock; Wherein the P frame deblocks and refers to a plurality of P frames are carried out deblocking operations), the P frame simplify motion compensation (in Fig. 4, being labeled as " the P frame is simplified MC "), fast the P frame decoding, abandon (Intra frame in P frame, the adaptive frame; I frame) (hereinafter to be referred as " I frame ") deblocks (for example, self adaptation is carried out all or part of I frame and deblocked or skip the I frame and deblock, and wherein the I frame deblocks and refers to a plurality of I frames are carried out deblocking operations) and I frame decoding fast.It is used that the example of being takeed is merely explanation, and the present invention is not as limit." quality " on the vertical axis but the overall merit of mark presentation video quality, fluency, user's perceptibility, system resource saving degree or various quality index.According to some distortion of this embodiment, can be different under different situations corresponding to the quality and the processing speed of these operation/steps.For example, in operation/step shown in Figure 4, the operation/step that abandons the B frame can be inserted between the operation/step of standard decoding process and the operation/step that self adaptation B frame deblocks.Again for example, in operation/step shown in Figure 4, operation/step that self adaptation I frame deblocks can be inserted in that the P frame is simplified the operation/step of motion compensation and fast between the operation/step of P frame decoding.Again for example, in operation/step shown in Figure 4, abandon operation/step that the operation/step of P frame can be close to quick I frame decoding, therefore, become an operation/step of the bottom in operation/step shown in Figure 4.
In this embodiment, the best in quality that can get based on first strategy-realization, when the video decode delay issue is not the very crux, but the operation/step of decoding complex degree manager 100M trigger criteria decoding process.Yet; When confirming the delay of meeting generation video decode, (for example find that hardware resource deficiency and/or decoding workload are greater than predetermined threshold value); Decoding complex degree manager 100M can trigger one or more operation/steps; Preventing that serious video decode from postponing, and realize the available best in quality of decoder under the present case.For example, in operation/step shown in Figure 4, decoding complex degree manager 100M can trigger next suitable operation/step (self adaptation B frame operation/step of deblocking for example; The B frame is simplified the operation/step of motion compensation etc.); To discharge hardware resource and/or to reduce the decoding workload, wherein, when reducing decoding complex degree; Operation/step corresponding to higher quality level has higher execution priority, and can in the end carry out corresponding to the operation/step than quality level.It is used that the example of being takeed is merely explanation, and the present invention is not as limit.According to the distortion of this embodiment, decoding complex degree manager 100M can operate based on the predetermined quality scale of second strategy-realization, rather than operates based on the realization best in quality.According to some other distortion of this embodiment, decoding complex degree manager 100M can operate based on some strategies of realizing the fastest processing speed or predetermined processing speed.
The correlated quality of certain operations/step that Fig. 5 can trigger for decoding complex degree manager 100M in accordance with another embodiment of the present invention and the sketch map of processing speed; Wherein, these operations are about the decoding complex degree management of adaptive video coding/decoding method 910 as shown in Figure 2.Particularly, operation/step of considering among this embodiment comprises: normally deblock, simply deblock and forbid and deblock.The controlling mechanism that note that decoding complex degree manager 100M can be switched between these operation/steps according to a plurality of predetermined threshold value (for example, two threshold value T1 shown in Figure 5 and T2), wherein, and the appropriate level of predetermined threshold value T1 and T2 representation quality.
The sketch map of certain operations/step that Fig. 6 can trigger under different situations for decoding complex degree manager 100M in accordance with another embodiment of the present invention, these operations are about the decoding complex degree management of adaptive video coding/decoding method 910 as shown in Figure 2.Particularly, operation/step of considering among this embodiment comprises: stop the B frame and deblock, stop the P frame and deblock, start self adaptation P frame and deblock, start self adaptation I frame and deblock and stop to deblock.Please note; The controlling mechanism of decoding complex degree manager 100M can be according to a plurality of predetermined threshold value (for example; Three threshold value TI, TP and TB shown in Figure 6) between these operation/steps, switch, wherein, predetermined threshold value TI, TP and TB represent the appropriate level of display buffer state.In this embodiment, predetermined threshold value TI, TP and TB are respectively applied for decision and whether start/stop that the B frame deblocks, the P frame deblocks and the I frame deblocks.Especially, for expiring or being almost under the full situation, decoding complex degree manager 100M does not stop any one that the I frame deblocks, the P frame deblocks and the B frame deblocks at display buffer 180.On the contrary, be empty or be almost under the empty situation that at display buffer 180 decoding complex degree manager 100M stops each that the I frame deblocks, the P frame deblocks and the B frame deblocks.
More specifically; At the buffer state of display buffer 180 (more specifically; The buffering rank of display buffer 180) under the situation between predetermined threshold value TP and the TB; Decoding complex degree manager 100M stops the B frame and deblocks, and triggers operation/step (the P frame that promptly has complicacy self-adaptive deblocks) that startup self adaptation P frame deblocks.In addition; At the buffer state of display buffer 180 (more specifically; The buffering rank of display buffer 180) under the situation between predetermined threshold value TI and the TP; Decoding complex degree manager 100M stops the P frame and deblocks and deblock with the B frame, and triggers and start operation/step (the I frame that promptly has complicacy self-adaptive deblocks) that self adaptation I frame deblocks.In addition, under the situation between predetermined threshold value TI and 0, decoding complex degree manager 100M stops that the I frame deblocks, the P frame deblocks and the B frame deblocks at the buffer state (more specifically, the buffering rank of display buffer 180) of display buffer 180.
In this embodiment, about the controlling mechanism that complicacy self-adaptive deblocks, decoding complex degree manager 100M can (Macroblock MB) operates for the scheme of deblocking on basis based on macro block.For example, decoding complex degree manager 100M can be according to the bitstream length of at least a portion of buffer state and incoming bit stream 108 (for example a part or all), and the I frame deblocks, the P frame deblocks and/or the B frame deblocks for self-adapting start/stop.It is used that the example of being takeed is merely explanation, and the present invention is not as limit.According to the distortion of this embodiment, about the controlling mechanism that complicacy self-adaptive deblocks, decoding complex degree manager 100M can operate for the scheme of deblocking on basis based on frame.For example; Decoding complex degree manager 100M can come to start adaptively/stop that the I frame deblocks, the P frame deblocks and/or the B frame deblocks according to bitstream length, quantization step, MB type and/or the edge strength of at least a portion of buffer state, incoming bit stream 108 (for example a part or all); Wherein, Quantization step is so-called quantization parameter (Quantization Parameter, QP) value.
Advantage of the present invention is; The adaptive video coding/decoding method of each embodiment/distortion of above-mentioned announcement, relevant complicacy self-adaptive Video Decoder and corresponding adaptive audio/audio/video player system are applicable to various digital video application; Wherein, at least a portion in a plurality of elements in the complicacy self-adaptive Video Decoder (for example a part or all) can be operated by low-level video decoding complexity.Owing to can adjust the video decoding complexity of one or more elements, decoding workload and corresponding power consumption can reduce adaptively.Therefore, with relevant compared with techniques, the very big flexibility of the present invention for realizing that the digital video Play System provides.
The above embodiments only are used for enumerating execution mode of the present invention, and explain technical characterictic of the present invention, are not to be used for limiting category of the present invention.Any person of ordinary skill in the field is according to spirit of the present invention and the scope that unlabored change or isotropism arrangement all belong to the present invention is advocated, interest field of the present invention should be as the criterion with claim.
Claims (29)
1. adaptive video coding/decoding method, said adaptive video coding/decoding method comprises:
Based on the bit stream information of the incoming bit stream of complicacy self-adaptive Video Decoder, carry out the decoding complex degree management, whether reduce in the said complicacy self-adaptive Video Decoder decoding complex degree of at least one element in a plurality of elements with decision; And
Selectivity reduces the decoding complex degree of a part of element in interior these a plurality of elements of said complicacy self-adaptive Video Decoder.
2. adaptive video coding/decoding method as claimed in claim 1 is characterized in that, said a plurality of elements comprise:
Variable length decoding and inverse quantization module are used for said incoming bit stream is carried out quick variable length decoding and inverse quantization, to produce a plurality of inverse quantization results fast;
The inverse transformation unit is used for said a plurality of inverse quantization results are carried out inverse transformation, to produce a plurality of inverse transformation results;
Motion compensating module; Be used for carrying out motion compensation and producing corresponding a plurality of prediction output result according to said incoming bit stream; Wherein said motion compensating module comprises time prediction unit and spatial prediction unit, and said time prediction unit is used for the time of implementation prediction to produce at least a portion of said a plurality of prediction output results; And said spatial prediction unit is used to carry out spatial prediction to produce at least a portion of said a plurality of prediction output results;
Computing unit is used to add up to said a plurality of inverse transformation result and said a plurality of prediction output result to produce a plurality of compensation output results;
The reconstruction frames output unit is used for producing a plurality of reconstruction frames according to said a plurality of compensation output results, and wherein, said spatial prediction unit is carried out spatial prediction according to the current reconstruction frames of said a plurality of reconstruction frames; And
The frame memory cell is used for storing at least a portion of said a plurality of reconstruction frames, and wherein, said time prediction unit is according to said at least a portion time of implementation prediction of said a plurality of reconstruction frames temporarily.
3. adaptive video coding/decoding method as claimed in claim 1 is characterized in that, said a plurality of elements comprise:
Display buffer is used for storing a plurality of picture frames temporarily;
Wherein, the step of said execution decoding complex degree management comprises:
Based on the display buffer state of said display buffer, carry out the decoding complex degree management.
4. adaptive video coding/decoding method as claimed in claim 1 is characterized in that, the step of said execution decoding complex degree management comprises:
Produce at least one control signal, to control the decoding complex degree of subelement described in said a plurality of elements in the said complicacy self-adaptive Video Decoder.
5. adaptive video coding/decoding method as claimed in claim 1 is characterized in that, said a plurality of elements comprise:
Demonstration time adjustment driver; Wherein, Under the control of said demonstration time adjustment driver; Output is stored in a plurality of picture frames in the display buffer as a plurality of output frames temporarily, and said a plurality of output frames are used for respectively on a plurality of time points of the voice playing of respective audio information, showing.
6. adaptive video coding/decoding method as claimed in claim 2 is characterized in that, said time prediction unit is operated according to the resolution of said a plurality of reconstruction frames, to reduce the complexity of time of implementation prediction.
7. adaptive video coding/decoding method as claimed in claim 2 is characterized in that said spatial prediction unit is operated according to the resolution of said a plurality of reconstruction frames, to reduce the complexity of carrying out spatial prediction; And said spatial prediction unit further estimates to can be used for carrying out in the abridged partial information at least a portion of spatial prediction.
8. adaptive video coding/decoding method as claimed in claim 2 is characterized in that, said inverse transformation unit is operated according to the resolution of said a plurality of reconstruction frames, to reduce the complexity of carrying out said inverse transformation; And said inverse transformation unit omits the part of a plurality of calculating of said inverse transformation.
9. adaptive video coding/decoding method as claimed in claim 2 is characterized in that, said reconstruction frames output unit is operated according to the resolution of said a plurality of reconstruction frames, to reduce the complexity that produces said a plurality of reconstruction frames.
10. adaptive video coding/decoding method as claimed in claim 2 is characterized in that, said quick variable length decoding and inverse quantization module are operated according to the resolution of said a plurality of reconstruction frames, to reduce the complexity of carrying out quick variable length decoding and inverse quantization; And said quick variable length decoding and inverse quantization module use the look-up table that comprises master meter and at least one sublist during decoding, and the probability of use of said master meter is greater than the probability of use of said at least one sublist.
11. adaptive video coding/decoding method as claimed in claim 1 is characterized in that, the step of said execution decoding complex degree management comprises:
Based at least one parameter of the disposal ability of representing said complicacy self-adaptive Video Decoder, carry out the decoding complex degree management.
12. adaptive video coding/decoding method as claimed in claim 1 is characterized in that, the said bit stream information of said incoming bit stream comprises combination or one of them of bit rate, resolution and frame type.
13. adaptive video coding/decoding method as claimed in claim 1 is characterized in that, the said bit stream information of said incoming bit stream comprises combination or one of them of a plurality of motion vectors, a plurality of residual error and bitstream length.
14. a complicacy self-adaptive Video Decoder comprises:
A plurality of elements are used to carry out a plurality of operations relevant with video decode; And
The decoding complex degree manager is used for carrying out the decoding complex degree management based on the bit stream information of incoming bit stream, whether reduces the decoding complex degree of at least one element in the said complicacy self-adaptive Video Decoder with decision;
Wherein, said decoding complex degree manager selectivity reduces in the said complicacy self-adaptive Video Decoder decoding complex degree of a part of element in said a plurality of elements.
15. complicacy self-adaptive Video Decoder as claimed in claim 14 is characterized in that, said a plurality of elements comprise:
Fast variable length decoding and inverse quantization module are used for said incoming bit stream is carried out quick variable length decoding and inverse quantization to produce a plurality of inverse quantization results;
The inverse transformation unit is used for said a plurality of inverse quantization results are carried out inverse transformation to produce a plurality of inverse transformation results;
Motion compensating module; Be used for carrying out motion compensation and producing corresponding a plurality of prediction output result according to said incoming bit stream; Wherein said motion compensating module comprises time prediction unit and spatial prediction unit, and said time prediction unit is used for the time of implementation prediction to produce said a plurality of prediction output results of at least a portion; And said spatial prediction unit is used to carry out spatial prediction to produce said a plurality of prediction output results of at least a portion;
Computing unit is used to add up to said a plurality of inverse transformation result and said a plurality of prediction output result to produce a plurality of compensation output results;
The reconstruction frames output unit is used for producing a plurality of reconstruction frames according to said a plurality of compensation output results, and wherein, said spatial prediction unit is carried out spatial prediction according to the current reconstruction frames of said a plurality of reconstruction frames; And
The frame memory cell is used for storing at least a portion of said a plurality of reconstruction frames, and wherein, said time prediction unit is according to said at least a portion time of implementation prediction of said a plurality of reconstruction frames temporarily.
16. complicacy self-adaptive Video Decoder as claimed in claim 14 is characterized in that, said a plurality of elements comprise:
Wherein, said decoding complex degree manager is carried out the decoding complex degree management based on the display buffer state of said display buffer.
17. complicacy self-adaptive Video Decoder as claimed in claim 14; It is characterized in that; Said decoding complex degree manager produces at least one control signal according to the said bit stream information of said incoming bit stream; To control the decoding complex degree of subelement described in said a plurality of elements in the said complicacy self-adaptive Video Decoder, said a plurality of elements are controlled by said at least one control signal respectively.
18. complicacy self-adaptive Video Decoder as claimed in claim 14 is characterized in that, said a plurality of elements comprise:
Demonstration time adjustment driver; Wherein, Under the control of said demonstration time adjustment driver; Output is stored in a plurality of picture frames in the display buffer as a plurality of output frames temporarily, and said a plurality of output frames are used for respectively on a plurality of time points of the voice playing of respective audio information, showing.
19. complicacy self-adaptive Video Decoder as claimed in claim 15 is characterized in that, said time prediction unit is operated according to the resolution of said a plurality of reconstruction frames, to reduce the complexity of time of implementation prediction.
20. complicacy self-adaptive Video Decoder as claimed in claim 15 is characterized in that said spatial prediction unit is operated according to the resolution of said a plurality of reconstruction frames, to reduce the complexity of carrying out spatial prediction; And said spatial prediction unit further estimates to can be used for carrying out in the abridged partial information at least a portion of spatial prediction.
21. complicacy self-adaptive Video Decoder as claimed in claim 15 is characterized in that, said inverse transformation unit is operated according to the resolution of said a plurality of reconstruction frames, to reduce the complexity of carrying out said inverse transformation; And said inverse transformation unit omits the part of a plurality of calculating of said inverse transformation.
22. complicacy self-adaptive Video Decoder as claimed in claim 15 is characterized in that, said reconstruction frames output unit is operated according to the resolution of said a plurality of reconstruction frames, to reduce the complexity that produces said a plurality of reconstruction frames.
23. complicacy self-adaptive Video Decoder as claimed in claim 15 is characterized in that, said quick variable length decoding and inverse quantization module are operated according to the resolution of said a plurality of reconstruction frames, to reduce the complexity of carrying out quick variable length decoding and inverse quantization; And said quick variable length decoding and inverse quantization module use the look-up table that comprises master meter and at least one sublist during decoding, and the probability of use of said master meter is greater than the probability of use of said at least one sublist.
24. complicacy self-adaptive Video Decoder as claimed in claim 14 is characterized in that, said decoding complex degree manager is carried out the decoding complex degree management based at least one parameter of the disposal ability of the said complicacy self-adaptive Video Decoder of representative.
25. complicacy self-adaptive Video Decoder as claimed in claim 14 is characterized in that, the said bit stream information of said incoming bit stream comprises combination or one of them of bit rate, resolution and frame type.
26. complicacy self-adaptive Video Decoder as claimed in claim 14 is characterized in that, the said bit stream information of said incoming bit stream comprises combination or one of them of a plurality of motion vectors, a plurality of residual error and bitstream length.
27. complicacy self-adaptive Video Decoder as claimed in claim 14 is characterized in that, said decoding complex degree manager postpones the voice playing of audio-frequency information.
28. an adaptive audio/audio/video player system comprises:
Audio decoder is used to carry out audio decoder to produce audio-frequency information; And
Video Decoder is used to carry out video decode, and wherein, said Video Decoder comprises the decoding management device, and said decoding management device postpones the voice playing of said audio-frequency information according to the bit stream information of incoming bit stream.
29. adaptive audio/audio/video player system as claimed in claim 28 is characterized in that, the said decoding management device of said Video Decoder is further according to the delay of the parameter of representing disposal ability or display buffer state decision voice playing.
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| US12/830,419 | 2010-07-05 |
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| TW201204049A (en) | 2012-01-16 |
| TWI543627B (en) | 2016-07-21 |
| CN102316319B (en) | 2016-08-10 |
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