báo cáo hóa học:" Research Article Audio Query by Example Using Similarity Measures between Probability Density Functions of Features" potx

... proposes a query by example system for generic audio. Section 2 gives an overview of the system and previous similarity measures. We observe that the similarity of audio signals can be measured by the ... methods in audio retrieval task in Section 4. 2. Query by Example Figure 1 illustrates the block diagram of the query by example system. An example sign...

Ngày tải lên: 21/06/2014, 20:20

... especially useful for detecting the onset of speaking periods. Figure 5(b) shows an example of a (a) (b) (c) Figure 6: An example of optical-flow analysis using a pair of lip im- ages (a) and (b). Optical-flow ... shows an example of the baseline. (4) The number of points on each line segment drawn during stage 2 is counted in the binary image made by using hue values. F...

Ngày tải lên: 22/06/2014, 19:20

... especially useful for detecting the onset of speaking periods. Figure 5(b) shows an example of a (a) (b) (c) Figure 6: An example of optical-flow analysis using a pair of lip im- ages (a) and (b). Optical-flow ... shows an example of the baseline. (4) The number of points on each line segment drawn during stage 2 is counted in the binary image made by using hue values. F...

Ngày tải lên: 22/06/2014, 22:20

... retrieved using a query composed by the keywords in a node n in the tree. For example, if n is the root node of the tree in Figure 5, d(n) is the number of Web documents retrieved by the AND query ... Therefore, we use a “fuzzier” way of using the query relevance: we determine the number of downloaded documents by a query so that the number is proportional to the va...

Ngày tải lên: 21/06/2014, 20:20

... efficient dig- ital audio watermarking using audio content analysis,” in Pro- ceedings of Security and Watermarking of Multimedia Contents II: Audio Watermarking, vol. 3971 of Proceedings of SPIE,pp. 382–392, ... hiding of 25 bps robust to 64 kbps/ch of audio compression were reported with BER <5%. A year later, we achieved 50 bps of data hiding by QIM in the fre- q...

Ngày tải lên: 22/06/2014, 19:20

... zero crossing: measures the noisiness of the signal and is defined as the number of time domain zero crossings of the signal. (v) Low energy: measures the amplitude distribution of the sig nal ... original features. Most of the MIR methods using audio signals have two processing steps. The first one is a frame-based feature extraction step of acoustic data where feature vect...

Ngày tải lên: 22/06/2014, 23:20

... and classified by key relationships, as well as stylistic periods. At the second stage of the evaluation, we use audio recordings of 24 Chopin Preludes to test the extensions of the audio key- finding ... audio outperforms symbolic key finding Figure 4 shows the first four measures of Bach’s Double Con- certo in D minor for two violins, BWV1043. For the whole duration of the f...

Ngày tải lên: 22/06/2014, 23:20

... simplicity. An optimal form of BD is proposed by extending the search domain of precoding matrices to the entire null space of other users’ transmissions [34]. The dual of the throughput maximization ... the left side of (16) is a linear combination of all entries of matrix Θ and not only the diagonal terms. The selection of Θ as a diagonal matrix reduces the search domain s...

Ngày tải lên: 21/06/2014, 05:20

... computational cost of the rest of the algorithm. From Table 1,itcanbenotedthatthereisanorderof magnitude between the two proposed schemes in terms of computational cost. This difference between the t ... show a practical decrease of the execution times by nearly a factor two between Scheme1 and Scheme2 implementations, and a decrease of execution times of a factor 3 betwee...

Ngày tải lên: 21/06/2014, 05:20

... multipath fading channel in the case of periodic co de scenario and using the average of the lower and upper boundary values is close to that of the GR of the case using the real optimal PCF, whether the ... that the B ER perfor- mances of GR employed by DS-CDMA systems of the cases using the proposed PCF at the first stage outperform ones of GR implemented in DS-CDMA sys...

Ngày tải lên: 21/06/2014, 05:20